Control valve structure is simple

Release time:2017-10-19 author:admin Browsing volume:194

The control valve has the advantages of simple structure and reliable action, but because it is direct contact with the process medium, its performance directly affects the quality and environmental pollution, so the control valve must be regular maintenance and periodic maintenance, especially for the use of harsh conditions and important occasions, more attention should be paid to the maintenance work. Key inspection sites:

1, the inner wall of the valve body

For the control valve used in high pressure differential and corrosive medium, the diaphragm of the valve body inner wall and diaphragm valve is often subjected to the impact and corrosion of the medium, so we must check the situation of pressure and corrosion resistance.

2, seat

When the control valve works, the inner surface of the screw thread is easily corroded and the seat is loose because of the infiltration of the medium. It should be paid attention to when the valve is checked. For the valve working under the high pressure difference, it is also necessary to check whether the seat seal face is damaged or not.

3. Valve core

The valve core is a movable part that regulates the work. The erosion and corrosion of the medium is the most serious. During the overhaul, we must carefully check whether the parts of the spool are corroded or worn, especially when the pressure difference is high, the spool wear is more serious (cavitation phenomenon), we should pay attention to it. The valve core should be replaced when the spool is seriously damaged, and it should also be paid attention to whether the stem also has similar phenomena or loose connection with the valve core.

4, diaphragm

"O" ring and other seal pads. It is necessary to check the aging and cracking of the diaphragm and the "O" seal.

5. Sealed packing

Attention should be paid to the aging of polytetrafluoroethylene fillers and sealing grease, and if the matching surface is damaged or not, it should be replaced when necessary.

The control valve, also known as the control valve, is the main type of actuator. It controls the output of the control unit by adjusting the output signal of the control unit, and changes the fluid flow by means of power operation. The regulating valve is generally composed of the actuator and the valve. If you press it with the enforcement agencies use the power, control valve can be divided into pneumatic, electric, hydraulic and three, that is the source of compressed air powered pneumatic control valve, electric power source for electric regulating valve, the liquid medium (such as oil) pressure powered electric hydraulic control valve in addition, according to their functions and features, as well as solenoid valves, electronic, intelligent, fieldbus regulating valve.

The control valve has the advantages of simple structure and reliable action, but because it is direct contact with the process medium, its performance directly affects the quality and environmental pollution, so the control valve must be regular maintenance and periodic maintenance, especially for the use of harsh conditions and important occasions, more attention should be paid to the maintenance work. Key inspection sites:

1, the inner wall of the valve body

For the control valve used in high pressure differential and corrosive medium, the diaphragm of the valve body inner wall and diaphragm valve is often subjected to the impact and corrosion of the medium, so we must check the situation of pressure and corrosion resistance.

2, seat

When the control valve works, the inner surface of the screw thread is easily corroded and the seat is loose because of the infiltration of the medium. It should be paid attention to when the valve is checked. For the valve working under the high pressure difference, it is also necessary to check whether the seat seal face is damaged or not.

3. Valve core

The valve core is a movable part that regulates the work. The erosion and corrosion of the medium is the most serious. During the overhaul, we must carefully check whether the parts of the spool are corroded or worn, especially when the pressure difference is high, the spool wear is more serious (cavitation phenomenon), we should pay attention to it. The valve core should be replaced when the spool is seriously damaged, and it should also be paid attention to whether the stem also has similar phenomena or loose connection with the valve core.

4, diaphragm

"O" ring and other seal pads. It is necessary to check the aging and cracking of the diaphragm and the "O" seal.

5. Sealed packing

Attention should be paid to the aging of polytetrafluoroethylene fillers and sealing grease, and if the matching surface is damaged or not, it should be replaced when necessary.

The control valve, also known as the control valve, is the main type of actuator. It controls the output of the control unit by adjusting the output signal of the control unit, and changes the fluid flow by means of power operation. The regulating valve is generally composed of the actuator and the valve. If you press it with the enforcement agencies use the power, control valve can be divided into pneumatic, electric, hydraulic and three, that is the source of compressed air powered pneumatic control valve, electric power source for electric regulating valve, the liquid medium (such as oil) pressure powered electric hydraulic control valve in addition, according to their functions and features, as well as solenoid valves, electronic, intelligent, fieldbus regulating valve.

The control valve has the advantages of simple structure and reliable action, but because it is direct contact with the process medium, its performance directly affects the quality and environmental pollution, so the control valve must be regular maintenance and periodic maintenance, especially for the use of harsh conditions and important occasions, more attention should be paid to the maintenance work. Key inspection sites:

1, the inner wall of the valve body

For the control valve used in high pressure differential and corrosive medium, the diaphragm of the valve body inner wall and diaphragm valve is often subjected to the impact and corrosion of the medium, so we must check the situation of pressure and corrosion resistance.

2, seat

When the control valve works, the inner surface of the screw thread is easily corroded and the seat is loose because of the infiltration of the medium. It should be paid attention to when the valve is checked. For the valve working under the high pressure difference, it is also necessary to check whether the seat seal face is damaged or not.

3. Valve core

The valve core is a movable part that regulates the work. The erosion and corrosion of the medium is the most serious. During the overhaul, we must carefully check whether the parts of the spool are corroded or worn, especially when the pressure difference is high, the spool wear is more serious (cavitation phenomenon), we should pay attention to it. The valve core should be replaced when the spool is seriously damaged, and it should also be paid attention to whether the stem also has similar phenomena or loose connection with the valve core.

"O" ring and other seal pads. Check control valve diaphragm, "O" shape seal

The control valve has the advantages of simple structure and reliable action, but because it is direct contact with the process medium, its performance directly affects the quality and environmental pollution, so the control valve must be regular maintenance and periodic maintenance, especially for the use of harsh conditions and important occasions, more attention should be paid to the maintenance work. Key inspection sites:

1, the inner wall of the valve body

For the control valve used in high pressure differential and corrosive medium, the diaphragm of the valve body inner wall and diaphragm valve is often subjected to the impact and corrosion of the medium, so we must check the situation of pressure and corrosion resistance.

2, seat

When the control valve works, the inner surface of the screw thread is easily corroded and the seat is loose because of the infiltration of the medium. It should be paid attention to when the valve is checked. For the valve working under the high pressure difference, it is also necessary to check whether the seat seal face is damaged or not.

3. Valve core

The valve core is a movable part that regulates the work. The erosion and corrosion of the medium is the most serious. During the overhaul, we must carefully check whether the parts of the spool are corroded or worn, especially when the pressure difference is high, the spool wear is more serious (cavitation phenomenon), we should pay attention to it. The valve core should be replaced when the spool is seriously damaged, and it should also be paid attention to whether the stem also has similar phenomena or loose connection with the valve core.

4, diaphragm

"O" ring and other seal pads. It is necessary to check the aging and cracking of the diaphragm and the "O" seal.

5. Sealed packing

Attention should be paid to the aging of polytetrafluoroethylene fillers and sealing grease, and if the matching surface is damaged or not, it should be replaced when necessary.

The control valve, also known as the control valve, is the main type of actuator. It controls the output of the control unit by adjusting the output signal of the control unit, and changes the fluid flow by means of power operation. The regulating valve is generally composed of the actuator and the valve. If you press it with the enforcement agencies use the power, control valve can be divided into pneumatic, electric, hydraulic and three, that is the source of compressed air powered pneumatic control valve, electric power source for electric regulating valve, the liquid medium (such as oil) pressure powered electric hydraulic control valve in addition, according to their functions and features, as well as solenoid valves, electronic, intelligent, fieldbus regulating valve.

The control valve has the advantages of simple structure and reliable action, but because it is direct contact with the process medium, its performance directly affects the quality and environmental pollution, so the control valve must be regular maintenance and periodic maintenance, especially for the use of harsh conditions and important occasions, more attention should be paid to the maintenance work. Key inspection sites:

1, the inner wall of the valve body

For the control valve used in high pressure differential and corrosive medium, the diaphragm of the valve body inner wall and diaphragm valve is often subjected to the impact and corrosion of the medium, so we must check the situation of pressure and corrosion resistance.

2, seat

When the control valve works, the inner surface of the screw thread is easily corroded and the seat is loose because of the infiltration of the medium. It should be paid attention to when the valve is checked. For the valve working under the high pressure difference, it is also necessary to check whether the seat seal face is damaged or not.

3. Valve core

The valve core is a movable part that regulates the work. The erosion and corrosion of the medium is the most serious. During the overhaul, we must carefully check whether the parts of the spool are corroded or worn, especially when the pressure difference is high, the spool wear is more serious (cavitation phenomenon), we should pay attention to it. The valve core should be replaced when the spool is seriously damaged, and it should also be paid attention to whether the stem also has similar phenomena or loose connection with the valve core.

4, diaphragm

"O" ring and other seal pads. It is necessary to check the aging and cracking of the diaphragm and the "O" seal.

5. Sealed packing

Attention should be paid to the aging of polytetrafluoroethylene fillers and sealing grease, and if the matching surface is damaged or not, it should be replaced when necessary.

The control valve, also known as the control valve, is the main type of actuator. It controls the output of the control unit by adjusting the output signal of the control unit, and changes the fluid flow by means of power operation. The regulating valve is generally composed of the actuator and the valve. If you press it with the enforcement agencies use the power, control valve can be divided into pneumatic, electric, hydraulic and three, that is the source of compressed air powered pneumatic control valve, electric power source for electric regulating valve, the liquid medium (such as oil) pressure powered electric hydraulic control valve in addition, according to their functions and features, as well as solenoid valves, electronic, intelligent, fieldbus regulating valve.

The control valve has the advantages of simple structure and reliable action, but because it is direct contact with the process medium, its performance directly affects the quality and environmental pollution, so the control valve must be regular maintenance and periodic maintenance, especially for the use of harsh conditions and important occasions, more attention should be paid to the maintenance work. Key inspection sites:

1, the inner wall of the valve body

For the control valve used in high pressure differential and corrosive medium, the diaphragm of the valve body inner wall and diaphragm valve is often subjected to the impact and corrosion of the medium, so we must check the situation of pressure and corrosion resistance.

2, seat

When the control valve works, the inner surface of the screw thread is easily corroded and the seat is loose because of the infiltration of the medium. It should be paid attention to when the valve is checked. For the valve working under the high pressure difference, it is also necessary to check whether the seat seal face is damaged or not.

3. Valve core

The valve core is a movable part that regulates the work. The erosion and corrosion of the medium is the most serious. During the overhaul, we must carefully check whether the parts of the spool are corroded or worn, especially when the pressure difference is high, the spool wear is more serious (cavitation phenomenon), we should pay attention to it. The valve core should be replaced when the spool is seriously damaged, and it should also be paid attention to whether the stem also has similar phenomena or loose connection with the valve core.

"O" ring and other seal pads. Check control valve diaphragm, "O" shape seal


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