Pneumatic valve maintenance strategy

, scope: this specification applies Yu Falan connect the electric ( Or pneumatic) Valve. And: by electric ( Or pneumatic) Actuator ( ） And the body parts, its connection by stents ( ） And the connecting shaft ( ） 。 , use limit temperature and pressure limit l nameplate shows a valve in the maximum and minimum operating temperature is allowed to the maximum operating pressure. L using PTFE or RTFE seat and seal material, operating temperature should be between degrees and degrees. Other types of operating temperature of the seat and seal, should be check. Cryogenic valve nominal pressure level l ( PN) , can show that the maximum working pressure in normal temperature condition. （ For example: the PN. , shows that its operating temperature in - C - C when the maximum working pressure for the Bar, 。 MPa) ） 。 L electric or pneumatic actuators attention see its corresponding specifications. , installation) , take off the protective cover on both sides of the flange end, under the conditions of valve fully open to wash clean. ） , before installation shall be in accordance with the provisions of signal, Electricity or gas) The engine test ( Prevent because of transportation vibration impact performance) , qualified rear can install ( According to the electric actuator wiring diagram wiring) 。 ) Before, preparation, and pipeline connection, you must wash and clean the pipe residual impurities ( These substances may damage the seat and) 。 ) , during the installation, please don't use valve actuator part as a lifting of the lifting point, in order to avoid damage the actuator and accessories. 。 ) This kind of valve should be installed in horizontal or vertical direction of pipeline. ) Near, installation of pipe with low or bear the phenomenon of external force, can use a pipe support or support to eliminate the deviation of pipelines. ) After, and pipeline connection, please use specified torque cross locking bolt flange connection. , and use of operation), Must be confirmed before operation, piping and valves have been washed. ) , and the size of the valve operation according to the actuator input signal turns the valve stem complete: positive rotation/circle ( °) When the valve is shut off. Reverse rotation/circle ( °) When the valve opens. ) , when executing agency indicating arrow direction parallel to the pipeline when the valve is open; Indicating arrow and vertical pipeline, the valve is closed. , maintenance has a longer service life and maintenance free, will depend on several factors: the normal working conditions and maintain harmonious temperature/pressure ratio, and the reasonable corrosion data