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The safety protection function of Gate Valve has important applications in our daily lives, especially in boilers. It can prevent excessive medium pressure inside the boiler from causing explosions. Moreover, in places where people gather, the occurrence of explosions will cause Very serious consequences, causing unnecessary personal danger and property damage. Only the correct use of Gate Valve can ensure real protection. First of all, we need to know that the Gate Valve must have good sealing properties and must be installed vertically. There must be no resistance at the outlet of the Gate Valve so that the Gate Valve can operate normally when it is opened. Secondly, the Gate Valve needs to undergo professional inspections regularly to ensure the safety of the Gate Valve. Effective for long term use. 1. Independent pressure system (separated from other systems with shut-off valve). The system refers to full gas phase, full liquid phase or gas phase communication; 2. When there is no Gate Valve at the source of the pressure material of the container; 3. Containers and pipelines whose design pressure is less than the pressure at the pressure source; 4. Outlet pipelines of positive displacement pumps and compressors; 5. Containers with overpressure due to accumulation of non-condensable gas; 6. If there is a shut-off valve or control valve on the outlet pipe of the heating furnace, a Gate Valve should be installed upstream of the valve; 7. Overpressure parts caused by process accidents, automatic control accidents, power accidents, fire accidents and public engineering accidents; 8. The part where the liquid undergoes thermal expansion due to the closing of the valves at both ends; 9. Steam outlet pipe of the condensing turbine; Due to the safe and effective protective effect of Gate Valve on some equipment, it has attracted the attention of relevant laws in our country. In the "Safety Law", relevant items have been specially formulated for Gate Valve, indicating that the safety work of boilers, elevators and other equipment must be strengthened. , to ensure the safety of personal and property. Of course, regarding the quality issues of Gate Valve, my country's regulatory authorities have also increased supervision and requirements to ensure that the quality of Gate Valve is qualified, so that the equipment used can play a real safety protection role and reduce the occurrence of accidents.

For the installation of Gate Valve, the first thing to note is that before installing the Universal Valve, the sealing performance must be tested. If the Universal Valve leaks or the air cushion is damaged, it must be replaced immediately so that everyone can Get the best use out of it. During the installation process, the first premise is that for all components of the Universal Valve, everyone needs to pay attention to vertical installation. The installation angle should be precise and regular, and tools should be used for corresponding assistance, so that you can Effectively making installation smooth and effective. Secondly, when installing the Gate Valve, Wuyue Universal Valve also reminds everyone not to apply pressure on the outlet of the Universal Valve. It is best to leave the outlet directly empty, which can allow the Universal Valve to work effectively and help everyone get The best use effect, better use experience, and better installation. Another thing is that when performing safety measures, please note that it is best for operators to wear corresponding gloves and tools on their hands to prevent oil stains and other problems from getting on the Universal Valve plate. This will affect the sealing effect of the Universal Valve and may also It will consume the service life of the entire Universal Valve and bring the best help to everyone. Finally, at least two operators must be present during the installation process of the Gate Valve, and they cannot be put into use immediately after the installation is completed. Instead, an effective trial should be conducted first to ensure that the Universal Valve can work normally before being put into use. Go in use.

1) Adjustment of opening pressure ① Before the general valve leaves the factory, its opening pressure should be adjusted one by one to the setting value required by the user. If the user proposes a spring working pressure level, the factory adjustment should generally be made according to the lower limit of the pressure level. ② Before installing the Universal Valve on the protected equipment or before installation, the user must readjust it at the installation site to ensure that the set pressure value of the Universal Valve meets the requirements. ③ Within the spring working pressure level range indicated on the nameplate, the opening pressure can be adjusted by changing the spring compression amount by rotating the adjusting screw. ④ Before rotating the adjusting screw, the valve inlet pressure should be reduced to less than 90% of the opening pressure to prevent the valve disc from being driven to rotate when the adjusting screw is rotated, thereby damaging the sealing surface. ⑤ In order to ensure the accuracy of the opening pressure value, the medium conditions during adjustment, such as medium type, temperature, etc., should be as close as possible to the actual operating conditions. The opening pressure often changes when the type of medium changes, especially when the accumulation state of the medium is different (for example, from liquid phase to gas phase). As the operating temperature increases, the cracking pressure generally decreases. Therefore, when adjusting at normal temperature and using it at high temperature, the set pressure value at normal temperature should be slightly higher than the required opening pressure value. How high it is is related to the valve structure and material selection, and should be based on the manufacturer's instructions. ⑥Conventional general-purpose valves are used when additional back pressure is fixed. When the opening pressure is adjusted after inspection (the back pressure is atmospheric pressure at this time), the setting value should be the required opening pressure value minus the additional back pressure value. (2) Adjustment of discharge pressure and return pressure ① To adjust the valve discharge pressure and reseating pressure, an action test must be carried out with the valve reaching the full opening height. Therefore, it can only be carried out on a large-capacity test device or after the Universal Valve is installed on the protected equipment. The adjustment method varies depending on the valve structure. ② For the structure with recoil disk and Gate Valve, the Gate Valve is used for adjustment. Unscrew the fixing screw of the adjusting ring and insert a thin iron rod or other tool from the exposed screw hole to move the gear teeth on the adjusting ring to make the adjusting ring rotate left and right. When the adjusting ring is rotated counterclockwise to the left, its position increases, and both the discharge pressure and the return pressure will be reduced. On the contrary, when the adjusting ring is rotated clockwise to the right, its position decreases, and both the discharge pressure and the return pressure will increase. Each time you adjust, the adjustment: circle rotation should not be too large). After each adjustment, the fixing screw should be tightened so that its end is located in the groove between the two teeth of the adjusting ring, which can prevent the adjusting ring from rotating and produce no radial pressure on the adjusting ring. For safety reasons, before turning the adjustment ring, the inlet pressure of the Universal Valve should be appropriately reduced to prevent the valve from suddenly opening during adjustment and causing an accident. ③ For structures with upper and lower adjustment rings, the adjustment is more complicated. The Gate Valve is used to change the size of the channel between the valve disc and the adjusting ring, thereby changing the degree of pressure accumulation in the chamber between the valve disc and the adjusting ring when the valve is initially opened. When the Gate Valve is raised, the degree of pressure accumulation increases, thereby reducing the proportional opening stage of the valve and reaching sudden rapid opening faster. Therefore, raising the Gate Valve can reduce the discharge pressure. It should be noted that the Gate Valve cannot be raised too close to the valve disc. In that case, leakage at the sealing surface may cause the valve to suddenly open prematurely, but because the medium pressure is not enough to keep the valve disc in the open position at this time, the valve disc will close again immediately, so the valve will jump. (3) Lead seal After the adjustment of the Universal Valve is completed, it should be sealed to prevent the adjusted status from being changed at will. When renovating a Universal Valve, note the position of the adjusting screw and adjusting ring before disassembling the valve to facilitate adjustment after the reconditioning. After readjustment, it should be sealed again.

Gate Valve, most Gate Valve installed on the system will not fail. If problems occur, they are generally caused by a lack of engineering or maintenance experience. With the widespread use of this type of valve, people have summarized several causes and solutions for user reference. 1. The Gate Valve is leaking. The reasons for the failure are the following three points. The user needs to make adjustments accordingly: (1) The contact surface between the valve core and the valve seat is not tight; (2) There is dirt on the contact surface between the valve core and the valve seat; (3) The valve stem is deflected. 2. The Gate Valve opens when the pressure is not specified. The solution is as follows: (1) The spring adjustment pressure of the Universal Valve is insufficient, the spring fails or the elastic force is insufficient. The Gate Valve should be readjusted or replaced; (2) The Universal Valve weight moves forward. The weight should be moved to the original constant pressure position and tightened with the limit screw. 3. The Gate Valve does not open when it reaches the specified pressure. The solution is as follows: (1) If the valve core and valve seat are stuck, it can be ruled out by manual exhaust test; (2) The spring adjustment pressure of the Universal Valve is too large and should be readjusted; (3) When the weight of the Universal Valve moves backward, the weight should be moved to the original constant pressure position and tightened with the limit screw.

Gate Valve must be installed under any of the following circumstances: 1. Independent pressure system (separated from other systems with shut-off valve). The system refers to full gas phase, full liquid phase or gas phase communication; 2. When there is no Gate Valve at the source of the pressure material of the container; 3. Containers and pipelines whose design pressure is less than the pressure at the pressure source; 4. Outlet pipelines of positive displacement pumps and compressors; 5. Containers with overpressure due to accumulation of non-condensable gas; 6. If there is a shut-off valve or control valve on the outlet pipe of the heating furnace, a Gate Valve should be installed upstream of the valve; 7. Overpressure parts caused by process accidents, automatic control accidents, power accidents, fire accidents and public engineering accidents; 8. The part where the liquid undergoes thermal expansion due to the closing of the valves at both ends; 9. Steam outlet pipe of the condensing turbine;

The safety protection function of Gate Valve has important applications in our daily lives, especially in boilers. It can prevent excessive medium pressure inside the boiler from causing explosions. Moreover, in places where people gather, the occurrence of explosions will cause Very serious consequences, causing unnecessary personal danger and property damage. Only the correct use of Gate Valve can ensure real protection. First of all, we need to know that the Gate Valve must have good sealing properties and must be installed vertically. There must be no resistance at the outlet of the Gate Valve so that the Gate Valve can operate normally when it is opened. Secondly, the Gate Valve needs to undergo professional inspections regularly to ensure the safety of the Gate Valve. Effective for long term use. Due to the safe and effective protective effect of Gate Valve on some equipment, it has attracted the attention of relevant laws in my country. In the "Safety Law", relevant items have been specially formulated for Gate Valve, indicating that the safety work of boilers, elevators and other equipment must be strengthened, to ensure the safety of personal and property. Of course, regarding the quality issues of Gate Valve, my country's regulatory authorities have also increased supervision and requirements to ensure that the quality of Gate Valve is qualified, so that the equipment used can play a real safety protection role and reduce the occurrence of accidents.

① To adjust the valve discharge pressure and reseating pressure, an action test must be carried out with the valve reaching the full opening height. Therefore, it can only be carried out on a large-capacity test device or after the Gate Valve is installed on the protected equipment. The adjustment method varies depending on the valve structure. ②For the structure with recoil plate and valve seat adjustment ring, the valve seat adjustment ring is used for adjustment. Unscrew the fixing screw of the adjusting ring and insert a thin iron rod or other tool from the exposed screw hole to move the gear teeth on the adjusting ring to make the adjusting ring rotate left and right. When the adjusting ring is rotated counterclockwise to the left, its position increases, and both the discharge pressure and the return pressure will be reduced. On the contrary, when the adjusting ring is rotated clockwise to the right, its position decreases, and both the discharge pressure and the return pressure will increase. Every time you adjust, adjust: the rotation range of the circle should not be too large (usually a few teeth can be turned). After each adjustment, the fixing screw should be tightened so that its end is located in the groove between the two teeth of the adjusting ring, which can prevent the adjusting ring from rotating and produce no radial pressure on the adjusting ring. For safety reasons, before turning the adjustment ring, the Gate Valve inlet pressure should be appropriately reduced (generally should be lower than 90% of the opening pressure) to prevent the valve from suddenly opening during adjustment and causing an accident. ③ For structures with upper and lower adjustment rings (one adjustment ring each on the guide sleeve and valve seat), the adjustment is more complicated. The valve seat adjusting ring is used to change the size of the channel between the valve disc and the adjusting ring, thereby changing the degree of pressure accumulation in the chamber between the valve disc and the adjusting ring when the valve is initially opened. When the valve seat adjustment ring is raised, the degree of pressure accumulation increases, thereby reducing the proportional opening stage of the valve and reaching sudden rapid opening faster. Therefore, raising the valve seat adjustment ring can reduce the discharge pressure. It should be noted that the valve seat adjustment ring cannot be raised too close to the valve disc. In that case, leakage at the sealing surface may cause the valve to suddenly open prematurely, but because the medium pressure is not enough to keep the valve disc in the open position at this time, the valve disc will close again immediately, so the valve will jump. Valve seat adjustment: The "ring" is mainly used to reduce the proportion of the valve, the opening stage and adjust the discharge pressure. It also affects the return pressure. The upper adjustment ring is used to change the deflection angle of the flowing medium after being reflected on the underside of the valve disc, thereby changing the magnitude of the fluid force, thereby adjusting the seat back pressure. When the upper adjusting ring is raised, the turning angle decreases, and the fluid force decreases accordingly, thereby increasing the seat return pressure. On the contrary, when the upper adjusting ring is lowered, the reseating pressure decreases. Of course, while the upper adjusting ring changes the seat return pressure, it also affects the discharge pressure. That is, raising the upper adjusting ring causes the discharge pressure to increase, and lowering the upper adjusting ring causes the discharge pressure to decrease, but its impact is not as great as that of the back seat. The seat pressure is so obvious.

For the installation of Gate Valve, the first thing to note is that before installing the Universal Valve, the sealing performance must be tested. If the Universal Valve leaks or the air cushion is damaged, it must be replaced immediately so that everyone can Get the best use out of it. During the installation process, the first premise is that for all components of the Universal Valve, everyone needs to pay attention to vertical installation. The installation angle should be precise and regular, and tools should be used for corresponding assistance, so that you can Effectively making installation smooth and effective. Secondly, when installing the Gate Valve, Wuyue Universal Valve also reminds everyone not to apply pressure on the outlet of the Universal Valve. It is best to leave the outlet directly empty, which can allow the Universal Valve to work effectively and help everyone get The best use effect, better use experience, and better installation. Another thing is that when performing safety measures, please note that it is best for operators to wear corresponding gloves and tools on their hands to prevent oil stains and other problems from getting on the Universal Valve plate. This will affect the sealing effect of the Universal Valve and may also It will consume the service life of the entire Universal Valve and bring the best help to everyone. Finally, at least two operators must be present during the installation process of the Gate Valve, and they cannot be put into use immediately after the installation is completed. Instead, an effective trial should be carried out first to ensure that the Universal Valve can work normally before being put into use. Go in use.

A Plug Valve is a device that uses an electric actuator to control the opening of a Universal Valve. It has the following characteristics: 1. Automated Control: Plug Valve can be integrated with control systems to achieve automated control, improving production efficiency and quality. By working with sensors and controllers, flow, pressure, and temperature control can be achieved. 2. Fast Response: The electric actuator can quickly respond to control signals, rapidly opening the Universal Valve and achieving rapid flow regulation. This is crucial for applications requiring frequent adjustments and high-precision processes. 3. High Stability: During long-term operation, Plug Valve can stably maintain the set valve opening, unaffected by external factors. This ensures process stability and production continuity. 4. High Durability: The electric actuator is made of high-temperature and corrosion-resistant materials, capable of withstanding harsh working environments and having a long service life. Furthermore, Plug Valve have a simple structure and are easy to maintain. 5. High Safety: Plug Valve have automatic protection functions, such as overload protection and valve position feedback, which can prevent accidents caused by operational errors or equipment failures. Furthermore, Plug Valve can be remotely monitored and controlled, improving safety and reliability. 6. High Precision: Plug Valve offer high control precision, meeting various process requirements. Through PID control algorithms, flow, pressure, and temperature control can be achieved, improving product quality. In summary, Plug Valve feature automated control, rapid response, good stability, high durability, high safety, and high precision. They are suitable for various industrial applications requiring control of fluid flow, pressure, and temperature, making them a reliable and versatile valve device.

A Universal Valve is a valve device that uses electrical signals to open, regulate, or control the flow of media. In industrial production processes, automated control of Plug Valve helps achieve fluid control and regulation, enabling automated management of the production process. The following explains how automated control of Plug Valve is achieved. First, automated control of Plug Valve relies on a complete control system. This system typically includes sensors, a controller, actuators, and a monitoring system. Sensors collect parameters such as flow rate, pressure, and temperature, and transmit this data to the controller. The controller performs logical operations and generates control commands based on the parameters collected by the sensors; the actuator executes the commands issued by the controller, controlling the opening and closing of the Universal Valve. The monitoring system monitors the operating status of the control system in real time and provides data logging and alarm functions. Second, automated control of Plug Valve can be achieved through different control modes. Common control modes include PID control, ON/OFF control, and stepper control. PID control is a method that uses proportional, integral, and derivative control parameters to achieve precise control of the Universal Valve. ON/OFF control is a simple control method that controls the on/off state of a Universal Valve by setting a threshold. Step control, on the other hand, adjusts the opening degree of the Universal Valve through specific step values, thereby regulating the flow rate of the medium. Furthermore, to achieve automated control of Plug Valve, appropriate control strategies and parameter settings are required. The choice of control strategy should be determined based on specific control requirements and system characteristics; different control strategies will affect the system's response speed, stability, and accuracy. Parameter settings need to be determined based on actual process requirements and medium characteristics. Reasonable parameter settings can control the stability and performance of the system. In addition, the automated control of Plug Valve must also consider safety and reliability. During the design and installation of the control system, relevant standards and specifications must be followed to ensure the stability and safety of the control system. At the same time, regular inspection and maintenance of the control system are necessary to ensure its reliability and long-term stable operation. In summary, automated control of Plug Valve can help achieve intelligent management of industrial production processes, improving production efficiency and product quality. By selecting appropriate control systems, control modes, and parameter settings, and paying attention to safety and reliability, the control and automated operation of Plug Valve can be achieved, bringing more convenience and benefits to industrial production.

1) Adjustment of opening pressure ① Before the Gate Valve leaves the factory, its opening pressure should be adjusted one by one to the setting value required by the user. If the user proposes a spring working pressure level, the factory adjustment should generally be made according to the lower limit of the pressure level. ② Before installing the Gate Valve on the protected equipment or before installation, the user must readjust it at the installation site to ensure that the set pressure value of the Gate Valve meets the requirements. ③ Within the spring working pressure level range indicated on the nameplate, the opening pressure can be adjusted by changing the spring compression amount by rotating the adjusting screw. ④ Before rotating the adjusting screw, the valve inlet pressure should be reduced to less than 90% of the opening pressure to prevent the valve disc from being driven to rotate when the adjusting screw is rotated, thereby damaging the sealing surface. ⑤ In order to ensure the accuracy of the opening pressure value, the medium conditions during adjustment, such as medium type, temperature, should be as close as possible to the actual operating conditions. When the type of medium changes, especially when the accumulation state of the medium is different, the opening pressure often changes. As the operating temperature increases, the cracking pressure generally decreases. Therefore, when adjusting at normal temperature and using it at high temperature, the set pressure value at normal temperature should be slightly higher than the required opening pressure value. How high it is is related to the valve structure and material selection, and should be based on the manufacturer's instructions. ⑥Conventional Gate Valve are used when additional back pressure is fixed. When adjusting the opening pressure after inspection, the setting value should be the required opening pressure value minus the additional back pressure value. (2) Adjustment of discharge pressure and return pressure ① To adjust the valve discharge pressure and reseating pressure, an action test must be carried out with the valve reaching the full opening height. Therefore, it can only be carried out on a large-capacity test device or after the Gate Valve is installed on the protected equipment. The adjustment method varies depending on the valve structure. ②For the structure with recoil plate and Universal Valve adjusting ring, the Universal Valve adjusting ring is used for adjustment. Unscrew the fixing screw of the adjusting ring and insert a thin iron rod or other tool from the exposed screw hole to move the gear teeth on the adjusting ring to make the adjusting ring rotate left and right. When the adjusting ring is rotated counterclockwise to the left, its position increases, and both the discharge pressure and the return pressure will be reduced. On the contrary, when the adjusting ring is rotated clockwise to the right, its position decreases, and both the discharge pressure and the return pressure will increase. Every time you adjust, the range of adjustment circle rotation should not be too large. After each adjustment, the fixing screw should be tightened so that its end is located in the groove between the two teeth of the adjusting ring, which can prevent the adjusting ring from rotating and produce no radial pressure on the adjusting ring. For safety reasons, the inlet pressure of the Gate Valve should be appropriately reduced before turning the adjustment ring to prevent the valve from suddenly opening during adjustment and causing an accident. ③ For structures with upper and lower adjustment rings, the adjustment is more complicated. The Universal Valve adjusting ring is used to change the size of the channel between the valve disc and the adjusting ring, thereby changing the degree of pressure accumulation in the chamber between the valve disc and the adjusting ring when the valve is initially opened. When the Universal Valve adjustment ring is raised, the degree of pressure accumulation increases, thereby reducing the proportional opening stage of the valve and reaching sudden rapid opening faster. Therefore, raising the Universal Valve adjustment ring can reduce the discharge pressure. It should be noted that the Universal Valve adjustment ring cannot be raised too close to the valve disc. In that case, leakage at the sealing surface may cause the valve to suddenly open prematurely, but because the medium pressure is not enough to keep the valve disc in the open position at this time, the valve disc will close again immediately, so the valve will jump. (3) Lead seal After the adjustment of the Gate Valve is completed, it should be sealed to prevent arbitrary changes in the adjusted condition. When renovating a Gate Valve, note the position of the adjusting screw and adjusting ring before disassembling the valve to facilitate adjustment after the reconditioning. After readjustment, it should be sealed again.

1. Electric actuator performance: The accuracy of a Ball Valve is directly affected by the performance of its electric actuator. The output force, speed, and precision of the electric actuator determine the opening and closing speed of the Universal Valve, thus affecting the accuracy of the control system. 2. Valve body design and manufacturing quality: The design and manufacturing quality of the Universal Valve body plays a crucial role in its accuracy. The seat sealing performance, valve core material, and channel design all affect the stability and accuracy of the valve. 3. Fluid properties and operating conditions: The properties of the fluid medium, temperature, and pressure all affect the accuracy of the Ball Valve. Different media and operating conditions will result in different valve response times, stability, and accuracy. 4. Control system and regulation algorithm: The accuracy of a Ball Valve also depends on the performance of the control system and the quality of the regulation algorithm. A good control system can achieve rapid response and precise control, improving the accuracy of the Universal Valve. 5. Ball Valve installation and maintenance: Proper installation and regular maintenance are crucial for maintaining the accuracy of the Ball Valve. Improper installation or lack of maintenance over a long period may lead to problems such as air leakage and jamming, affecting the accuracy of the Universal Valve. 6. Influence of the surrounding environment: Factors such as temperature, humidity, and vibration in the surrounding environment can also affect the accuracy of the Ball Valve. Stable environmental conditions help improve the accuracy of the Universal Valve. In summary, the accuracy of a Ball Valve is affected by a combination of factors. Only through reasonable design, materials, and strict management in all aspects can precise control and stable operation be achieved. Therefore, when selecting and using Ball Valve, the above factors need to be considered to ensure their accuracy and reliability.

Gate Valve, most Gate Valve installed on the system will not fail. If problems occur, they are generally caused by a lack of engineering or maintenance experience. Gate Valve products generally include A41H spring slightly opened Gate Valve, A41Y spring slightly opened closed high-pressure Gate Valve, A41Y spring slightly opened closed high-pressure Gate Valve, AH42F spring closed safety return valve, A42Y-1000 full-open ultra-high pressure Gate Valve, LDA/LDWA Japanese standard Gate Valve, 900 German standard Gate Valve, QH40 quick switching Gate Valve, sanitary grade Gate Valve, GA49H impulse Gate Valve, A41Y spring slightly opened closed high pressure Gate Valve, NA42F built-in Gate Valve, QH40 quick switching Gate Valve and other types. With the widespread use of this type of valve, people have summarized several causes and solutions for user reference. 1. The Gate Valve is leaking. The reasons for the failure are the following three points. The user needs to make adjustments accordingly:(1) The contact surface between the valve core and the valve seat is not tight;(2) There is dirt on the contact surface between the valve core and the valve seat;(3) The valve stem is deflected.2. The Gate Valve opens when the pressure is not specified. The solution is as follows:(1) The spring adjustment pressure of the Universal Valve is insufficient, the spring fails or the elastic force is insufficient. The Gate Valve should be readjusted or replaced;(2) The Universal Valve weight moves forward. The weight should be moved to the original constant pressure position and tightened with the limit screw.3. The Gate Valve does not open when it reaches the specified pressure. The solution is as follows:(1) If the valve core and valve seat are stuck, it can be ruled out by manual exhaust test;(2) The spring adjustment pressure of the Universal Valve is too large and should be readjusted;(3) When the weight of the Universal Valve moves backward, the weight should be moved to the original constant pressure position and tightened with the limit screw.Gate Valve

Gate Valve The discharge capacity of a Gate Valve, that is, the engine, is one of the most important indicators to measure the performance of a Gate Valve. In the "Online Function and Gate Valve and Testing System" patented technology, open valve dynamic displacement measurement issues and related flow mechanisms are studied under the guidance. Main content: Nozzle flow field characteristics and basic equations of ideal gas for isentropic flow in fluid control, derived formulas to calculate the discharge amount of Gate Valve opening, and systematically summarized the discharge capacity factors of opening relief valves. Overpressure Gate Valve present interactive processes, especially changes in gas dynamic parameters.In experimental studies, flange and valve core sensors were used to detect sensor testing engine and other field related parameters. Displacement calculations were performed using two-dimensional and three-dimensional numerical simulations and experimental results, and the study showed similar simulation and experimental results using a special sensor to test and measure emissions with good fluidity. With appropriate treatment of displacement in numerical simulations, Gate Valve capabilities can be predicted more accurately.The Universal Valve solves the problem of low adjustment accuracy. This Universal Valve includes a valve body and a tubular upper cover with a handwheel. The valve body and the upper cover are fixedly connected. The handwheel is set at the top of the outer cover of the upper cover and has several positioning notches distributed at intervals. The cover and the handwheel Zhijian has positioned the positioning piece and the handwheel to press the positioning piece to position the positioning piece in the notch. The handwheel can lead the rotation of the positioning piece from the next positioning notch to the positioning piece, the upper cover and the valve body. Zhijian has a sealing sleeve. The sealing sleeve allows the cavity of the valve body to communicate with the non-cavity in the cover. The cover function has a spring. The spring opposes the other end of the film to reach the other end of the sealing sleeve. The sealing sleeve is always cut off. The tendency of the valve to close.Universal Valve with high sealing performance adjustment spring pressure accuracy. It has online monitoring and Universal Valve and inspection functions. It is characterized by: There is an adjusting nut in the fixed top convex body of the valve body. The adjusting nut has a pressure rod and a hollow-formed pressure rod with a summer opening at the bottom. It has a spherical structure and a flat structure, and the top The pressure rod and the bottom of the pressure rod arrive to receive the spring seat on the top cone and the valve rod is inserted into the cavity of the pressure rod; the pressure rail is located at the top with a powerful sensor or fastening bolt; protruding against the adjusting nut The lock nut is fastened to the valve body and there are also fixed lock nuts at the top of the top view of the adjusting fastening nut; there are at least two screw holes for fixing screws on the upper surface of the body of the valve.

① To adjust the discharge pressure and reseating pressure of the Universal Valve, an action test must be carried out with the Universal Valve reaching the full opening height. Therefore, it can only be carried out on a large-capacity test device or after the Gate Valve is installed on the protected equipment. The adjustment method varies depending on the structure of the Universal Valve. ② For the structure with recoil plate and valve seat adjustment ring, the valve seat adjustment ring is used for adjustment. Unscrew the fixing screw of the adjusting ring and insert a thin iron rod or other tool from the exposed screw hole to move the gear teeth on the adjusting ring to make the adjusting ring rotate left and right. When the adjusting ring is rotated counterclockwise to the left, its position increases, and both the discharge pressure and the return pressure will be reduced. On the contrary, when the adjusting ring is rotated clockwise to the right, its position decreases, and both the discharge pressure and the return pressure will increase. Every time you adjust, the range of adjustment circle rotation should not be too large. After each adjustment, the fixing screw should be tightened so that its end is located in the groove between the two teeth of the adjusting ring, which can prevent the adjusting ring from rotating and produce no radial pressure on the adjusting ring. For safety reasons, before turning the adjustment ring, the Gate Valve inlet pressure should be appropriately reduced to prevent the Universal Valve from suddenly opening during adjustment, causing an accident. ③ For structures with upper and lower adjustment rings, the adjustment is more complicated. The valve seat adjustment ring is used to change the size of the channel between the valve disc and the adjustment ring, thereby changing the degree of pressure accumulation in the chamber between the valve disc and the adjustment ring when the Universal Valve is initially opened. When the valve seat adjustment ring is raised, the degree of pressure accumulation increases, thereby reducing the proportional opening stage of the Universal Valve and reaching sudden rapid opening faster. Therefore, raising the valve seat adjustment ring can reduce the discharge pressure. It should be noted that the valve seat adjustment ring cannot be raised too close to the valve disc. In that case, leakage at the sealing surface may cause the Universal Valve to suddenly open prematurely. However, because the medium pressure is not enough to keep the valve disc in the open position at this time, the valve disc will close again immediately, so the Universal Valve will jump. The valve seat adjustment ring is mainly used to reduce the proportion of the Universal Valve, the opening stage and adjust the discharge pressure. It also affects the return pressure. The upper adjusting ring is used to change the deflection angle of the flowing medium after being reflected on the underside of the valve disc, thereby changing the magnitude of the fluid force, thereby adjusting the seat back pressure. When the upper adjusting ring is raised, the turning angle decreases, and the fluid force decreases accordingly, thereby increasing the seat return pressure. On the contrary, when the upper adjusting ring is lowered, the reseating pressure decreases. Of course, while the upper adjusting ring changes the return pressure, it also affects the discharge pressure. That is, raising the upper adjusting ring will increase the exhaust pressure, and lowering the upper adjusting ring will decrease the exhaust pressure, but its impact is not as great as that of the back seat. The seat pressure is so obvious.

1. Lever hammer type Universal Valve: Lever hammer type Universal Valve. The force of the weight is amplified by the lever and then loaded on the Gate Valve. The magnitude of the load remains unchanged during the opening and closing process of the valve, so the force transmitted from the valve stem is basically unchanged. Its disadvantage is that it is sensitive to vibration and has poor seat return performance. The Universal Valve with this structure can only be used on fixed equipment. The mass of the weight should generally not exceed 60KG to avoid difficulty in operation. The cast iron weight type Universal Valve is suitable for nominal pressure PN<=1.6MPa, medium temperature T<=200 degrees Celsius; the carbon steel weight type Universal Valve is suitable for nominal pressure PN<=4.0MPa, medium temperature t<=450 degrees Celsius.The hammer type Universal Valve is mainly used for water, steam and other media. 2. Micro-lift Universal Valve: A Universal Valve whose opening height is 1/40-1/20 of the diameter of the valve seat is a micro-lift Universal Valve. Micro-activated Universal Valve are further divided into micro-activated Universal Valve without adjusting rings and micro-activated Universal Valve with narrow adjusting rings, micro-activated spring Universal Valve without adjusting rings, and micro-activated spring Universal Valve with adjusting rings. valve. The spring Universal Valve with an adjustment ring can use the adjustment chart to adjust the discharge force, that is, the opening and closing pressure difference.3. Full-lift Universal Valve: A Universal Valve whose opening height is 1/4 to 1/3 of the diameter of the valve seat is a full-lift Universal Valve. The full-open Universal Valve is equipped with a recoil plate at the Gate Valve of the Universal Valve. With the help of the expansion impulse of the gas medium, the Gate Valve is opened to a sufficient height to meet the displacement requirements. Universal Valve with this structure are used more often and have higher sensitivity.

The Universal Valve is pressed on the valve seat by the spring force of the valve core. The valve is closed and the valve core top is under the steam. During normal operation, the clamping force under the spring is greater than the upward thrust of the steam, and the valve closes. When the steam pressure reaches the Gate Valve, the steam force is greater than the valve, spool, and rotor pump relief valve exhaust spring force. You can adjust the pressure in the relief valve by changing the pressure of the spring by adjusting the valve stem at the top of the screw. (1) The Universal Valve should be vertical, installed and installed at the steam interface position of the container or pipeline. (2) There should be no resistance at the outlet of the relief valve to avoid back pressure. If it is installed on a discharge line whose diameter is larger than the outlet path of the Gate Valve, attention should be paid to the Gate Valve exclusion of antifreeze and containers containing flammable or toxic, highly toxic media Discharge piping should be handled through outdoor safe or appropriate facilities. Drainage pipes shall not be fitted with any valves. (3) There should be no valve between the overflow valve and the pressure equipment, holding a flammable, explosive, toxic or viscous medium in a container, so that the valve can be easily replaced, cleaned and loaded, and its structure and size should not hinder the operation of the Gate Valve. normal operation. Stop valves must be fully open and sealed during normal operation. (4) When there are gas and liquid two-phase materials in the container, the Gate Valve should be installed in the gas phase part. (5) When the Gate Valve is used to discharge flammable liquids, the outlet of the Gate Valve should be connected to the accident storage tank. When the discharged material of the Gate Valve is high-temperature combustibles, the receiving container should have corresponding protective facilities. (6) Generally, Gate Valve can be vented on-site. The vent port of the Gate Valve should be more than 1 meter (m) higher than the operator and should not face open flames, spark-emitting locations and high-temperature equipment within 15 meters (m). The vent holes of Gate Valve of indoor equipment and containers should be led out of the roof, and the Gate Valve should be at least 2 meters (m) above the roof. (7) When there is a isolation valve at the inlet of the Gate Valve, the isolation valve should be in a normally open state, and the Gate Valve should be sealed to avoid errors.

1. Gate Valve leakage For equipment operating under pressure, leakage in excess of allowable levels occurs between the Gate Valve and the sealing valve seat. Cause: Dirt between the valve and valve seat sealing surfaces. When using a poppet valve, put the dirt and damage the sealing surface when the wrench is opened. Repair according to grinding or turning grinding method after a certain degree of damage; bend, tilt or tilt stem of lever and fulcrum, spool and valve position. The Gate Valve needs to be reinstalled or replaced because the spring elasticity has decreased or lost elasticity. Gate Valve return spring, and then take measures, such as adjusting the opening pressure. 2. Gate Valve jumps or vibrates frequently Mainly because spring is too big. An adjustment ring should be used instead to adjust the spring with appropriate stiffness. The return pressure of the Gate Valve is too high. The position of the adjusting ring should be adjusted; the exhaust pipe resistance is too great and the Gate Valve causes excessive exhaust back pressure. Low discharge pipe resistance. Adjusting the valve exhaust pressure and return pressure must reach the valve opening height for testing, therefore, it may only be performed on large-capacity testing equipment or when the relief valve is installed on protected equipment. Adjustment methods vary. The Gate Valve retainer and valve seat adjustment ring of the Universal Valve structure are adjusted to the valve seat ring. To loosen the adjustment ring screw, use a thin wand-like tool from the exposed screw. You can drag the adjustment ring gear teeth to turn the adjustment ring left or right. When the adjustment ring is rotated counterclockwise to the left, its elevated position will reduce pressure and return pressure. On the contrary, when the adjustment ring is rotated clockwise to the right, the lower exhaust pressure and back pressure must be increased. For each adjustment, the rotation range should not be too large (usually several teeth are rotated). After that, the adjustment screw should be tightened every time, so that the two teeth between the adjustment ring grooves can prevent the adjustment from ending the ring rotation without adjusting the radial pressure of the ring.

Gate Valve, when the pressure in the protected system rises, an additional force is generated on the sensing element, causing the element to move and open a gap in the Gate Valve channel, and the medium is discharged through the gap. The discharge capacity of the Gate Valve and the service life of its parts , related to the dynamic stability of the Gate Valve operation. The vibration of the Universal Valve will reduce the channel cross-sectional area and discharge capacity of the Gate Valve, and the collision of the Universal Valve with the valve seat and the opening height limiter will damage the sealing surface and other parts of the Gate Valve. , the two-stage full-open Gate Valve is most likely to produce Universal Valve oscillation. The dynamic instability of the Gate Valve operation is mainly caused by the following reasons: the discharge capacity of the Gate Valve exceeds the flow rate of the medium entering the Gate Valve, the spring stiffness is too large, and when the valve is opened, When large back pressure and external dynamic interference occur in the upper chamber of the Universal Valve. 1. Impact on emission capacityWhen the following conditions occur, the discharge capacity of the Gate Valve may exceed the flow rate of the medium entering the valve:① When the passage cross-sectional area of the selected Gate Valve exceeds the cross-sectional area required for calculation.② When the Gate Valve is installed on a system with changes in emergency displacement.③When the cross-sectional area of the inlet pipe is not enough, etc.2. Effect of spring stiffnessExcessive spring stiffness can also be the cause of Universal Valve oscillation. Full-open Gate Valve can achieve full-open discharge depending on the medium recoil force, but when the spring stiffness is too large, this force cannot be used by the spring force to achieve the set opening. height, so the Gate Valve cannot achieve full discharge. This will cause the Gate Valve to return to its seat as soon as it is opened, causing oscillation. If the stiffness is small, the Gate Valve will return to its seat at a very low pressure. In order to eliminate this phenomenon, it should be installed Provide a spring that meets the design, or test several actual groups of springs during design, and determine the most suitable spring through testing.3. Impact of system back pressureSimilar to the impact caused by excessive spring stiffness, the back pressure generated in the body cavity above the Universal Valve when the Gate Valve is opened may also cause the Universal Valve to oscillate. In order to avoid the generation of large back pressure, for open Gate Valve, the openings in the valve body are used Connect the body cavity above the Universal Valve to the atmosphere. For closed Gate Valve, connect the body cavity above the Universal Valve to the valve body outlet or outlet branch, and use the suction effect generated to reduce the pressure above the Universal Valve.

(1) Adjustment of opening pressure ① Before the Gate Valve leaves the factory, its opening pressure should be adjusted one by one to the setting value required by the user. If the user proposes a spring working pressure level, the factory adjustment should generally be made according to the lower limit of the pressure level. ② Before installing the Gate Valve on the protected equipment or before installation, the user must readjust it at the installation site to ensure that the set pressure value of the Gate Valve meets the requirements. ③ Within the spring working pressure level range indicated on the nameplate, the opening pressure can be adjusted by changing the spring compression amount by rotating the adjusting screw. ④ Before rotating the adjusting screw, the valve inlet pressure should be reduced to less than 90% of the opening pressure to prevent the valve disc from being driven to rotate when the adjusting screw is rotated, thereby damaging the sealing surface. ⑤ In order to ensure the accuracy of the opening pressure value, the medium conditions during adjustment, such as medium type, temperature, etc., should be as close as possible to the actual operating conditions. The opening pressure often changes when the type of medium changes, especially when the accumulation state of the medium is different (for example, from liquid phase to gas phase). As the operating temperature increases, the cracking pressure generally decreases. Therefore, when adjusting at normal temperature and using it at high temperature, the set pressure value at normal temperature should be slightly higher than the required opening pressure value. How high it is is related to the valve structure and material selection, and should be based on the manufacturer's instructions. ⑥Conventional Gate Valve are used when additional back pressure is fixed. When the opening pressure is adjusted after inspection (the back pressure is atmospheric pressure at this time), the setting value should be the required opening pressure value minus the additional back pressure value. Universal Valve adjustment safety technical operation process (2) Adjustment of discharge pressure and return pressure ① To adjust the valve discharge pressure and reseating pressure, an action test must be carried out with the valve reaching the full opening height. Therefore, it can only be carried out on a large-capacity test device or after the Gate Valve is installed on the protected equipment. The adjustment method varies depending on the valve structure. ②For the structure with recoil plate and valve seat adjustment ring, the valve seat adjustment ring is used for adjustment. Unscrew the fixing screw of the adjusting ring and insert a thin iron rod or other tool from the exposed screw hole to move the gear teeth on the adjusting ring to make the adjusting ring rotate left and right. When the adjusting ring is rotated counterclockwise to the left, its position increases, and both the discharge pressure and the return pressure will be reduced. On the contrary, when the adjusting ring is rotated clockwise to the right, its position decreases, and both the discharge pressure and the return pressure will increase. Every time you adjust, adjust: the range of rotation of the circle should not be too large (usually a few teeth can be turned). After each adjustment, the fixing screw should be tightened so that its end is located in the groove between the two teeth of the adjusting ring, which can prevent the adjusting ring from rotating and produce no radial pressure on the adjusting ring. For safety reasons, before turning the adjustment ring, the Gate Valve inlet pressure should be appropriately reduced (generally should be lower than 90% of the opening pressure) to prevent the valve from suddenly opening during adjustment and causing an accident. ③ For structures with upper and lower adjustment rings (one adjustment ring each on the guide sleeve and valve seat), the adjustment is more complicated. The valve seat adjusting ring is used to change the size of the channel between the valve disc and the adjusting ring, thereby changing the degree of pressure accumulation in the chamber between the valve disc and the adjusting ring when the valve is initially opened. When the valve seat adjustment ring is raised, the degree of pressure accumulation increases, thereby reducing the proportional opening stage of the valve and reaching sudden rapid opening faster. Therefore, raising the valve seat adjustment ring can reduce the discharge pressure. It should be noted that the valve seat adjustment ring cannot be raised too close to the valve disc. In that case, leakage at the sealing surface may cause the valve to suddenly open prematurely, but because the medium pressure is not enough to keep the valve disc in the open position at this time, the valve disc will close again immediately, so the valve will jump. Valve seat adjustment: The "ring" is mainly used to reduce the proportion of the valve, the opening stage and adjust the discharge pressure. It also affects the return pressure. (3) Lead seal After the adjustment of the Gate Valve is completed, it should be sealed to prevent arbitrary changes in the adjusted condition. When renovating a Gate Valve, note the position of the adjusting screw and adjusting ring before disassembling the valve to facilitate adjustment after the reconditioning. After readjustment, it should be sealed again.