Spring safety valve common faults and elimination

(1) after discharge valve back seat. This is mainly a spring bent stem the mounting position of the valve caused by incorrect or stuck. Should be re-assembled.
(2) leakage. Between the valves and valve seat sealing surface exceeds the allowable level of leakage in the device to work under pressure. The reason: there is dirt between the valves and valve seat sealing surface. Can be used to enhance the wrench to open the valve several times, rushed to the dirt; sealing surface damage. Should be based on the degree of injury, the use of the ground after grinding or turning to be repaired; stem bending, tilt or skew lever and fulcrum, the spool valve dislocation. Should be re-assembly or replacement; the spring elasticity decreased or loses its elasticity. Should take measures to replace the spring, re-adjust the opening pressure.
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(3) is not turned to a predetermined pressure. The reasons for this situation is the constant pressure are not allowed. Re-adjust the amount of compression of the spring or hammer; stuck valves and valve seat. Manual air or water test safety valve on a regular basis; lever safety valve lever is stuck or weight to be moved. Re-adjust the hammer position and make the lever moves freely.
(4) The exhaust gas after the pressure continues to rise. This is mainly because the the safety valve displacement Xiaoping equipment optional safety discharge should be re-selection of a suitable safety valve; stem rust midline is not correct or spring, the valve can not be opened to the proper height, should be re-assembled stem or replace the spring; exhaust pipe cut-off is not enough, should be taken to meet the safety discharge area of ??the exhaust pipe.
(5) valve frequency hopping or vibration. Primarily due to the stiffness of the spring is too large. Should be replaced by a suitable spring stiffness; adjustment ring to adjust properly, so that the high pressure of the back seat. Re-adjust the adjusting ring position; discharge piping resistance is too large, resulting in large emissions back pressure. Should reduce the discharge pipe resistance.
(6) less than the required pressure is turned on. Constant pressure not allowed; spring aging Elastic Fall. Should be properly tighten the adjustment screw or replace the spring.

solenoid valve actuator