Maintenance of pneumatic cut-off valve would you?

Pneumatic cut-off valve is played fast cutting function, it has a simple structure, sensitive reaction, reliable operation, etc. Can be widely used in petroleum, chemical, metallurgical and other industrial production. Pneumatic cut-off valve of air required by the compressed air filter, flowing through the valve body is supposed to be free of impurities and particles of the medium of liquid and gas. Pneumatic cut-off valve, pneumatic cut-off valve categories: normal rapid emergency pneumatic cut-off valve. Pneumatic - valve pipe due to the combination or improperly installed can produce all kinds of stress, thermal stress of high temperature medium, for example, when installation fastening force caused by uneven stress, some collision to the pneumatic control valve and the pipeline caused by stress, etc. The stress on the pneumatic control valve and pipeline, it is easy to affect the performance of the pneumatic control valve, seriously will affect the control system itself, lead to deformation of the valve stem and guide and cannot aim and seat center; For split type pneumatic control valve body, may cause the valve flange release; Stress may cause the seat leakage, etc. Any moment, therefore, make sure to avoid or eliminate stress, the stress direction out of the pneumatic control valve. In explosive dangerous sites using pneumatic control valve and the related accessories should check the safe operation of the situation, for example, sealing cover are tight, the operation situation of safety barrier, the power supply, etc. , ensure to safe operation of the pneumatic control valve and related accessories. Install pneumatic regulator is the best position to make the travel direction of the stem at the top of the actuator to the valve body in a vertical plane. If pneumatic - valve must be installed on the valve stem horizontal mobile location, or the movement of the valve stem direction and horizontal plane has a certain Angle, you should put actuator support, make every parts of pneumatic control valve is in natural state. If not described. compare or improper support adding may cause different heart of pneumatic control valve stem and valve seat, can easily lead to poor or make packing leakage fault. Even if pneumatic control valve has a fixed and supporting measures, must also be checked regularly, general 2 ~ 3 months to check one more time. Packing and oiler needs to be adjusted after short term use. Many occasions to dust covered with plastic or rubber around the valve stem packing box and the guide parts, presence of corrosive gas or liquid droplets occasions to the use of special protective measures, the commonly used anti-corrosion bag cover the pneumatic control valve, but does not influence its operation. Where fire resistance requirements, can use special methods of refractory coating, cover fire bag, fire bags containing multilayer ceramic fiber or glass fiber materials. Gas source is one of the key energy drive pneumatic pneumatic control valve. Pneumatic control valve of pneumatic membrane room although not consume air, but if the air supply system contains impurities such as water, oil, can make the valve positioner, relay and other attachment plug and failure. Must therefore be regularly check for gas source and power supply, ensure the air clean, dry, reliable power supply. Pneumatic control valve applied dedicated bracket, prevent loose, to ensure that the overall vertical or horizontal position. If long distance transportation, had better use strong wooden shipment. Pneumatic control valve in assembly and painting and installed according to the requirement, the handwheel actuator, locator and other accessories, to prevent foreign matter into the pneumatic control valve, pneumatic regulator all air interface to plug, connecting flange mount shield, to pay more attention to the connection parts, such as valve positioner intake pipe and actuators of the interface state. Any outstanding attachments, easily damaged the wound oiler and potentiometer pressure gauge, the fitting should be removed, with separate pneumatic - valve packing and transportation.