What are the common fault of safety valve

       The common faults

       After the valve does not discharge back seat: This is mainly spring bending stem, valve installation position is not correct or stuck due.Should be re assembled.

      Leakage: under normal working pressure in the equipment, valves and valve seat sealing surface between the degree of leakage than allowed. The reasons are: the dirt valve and valve seat sealing surface between. Can be used to enhance the wrench to open the valve several times, the dirt washed out; sealing surface damage.According to the degree of injury, by grinding or polishing methods after turning to repair; stem bending, tilting or deflection lever and fulcrum, so that spool and the valve flap transposition. Should be re assembled or replaced; spring elasticity or lose. Should be taken to replace the spring, re adjust the opening pressure and other measures.

      To the required pressure is not open: the reason for this situation is the constant pressure are not allowed. The amount of compressionor the position of the hammer should be re adjustment of the spring; and the valve seat valve stuck. Should be regular manual release or discharge test of safety valve; lever type safety valvelever is stuck or the hammer is moving. Should re adjust theposition and to hammer lever moves freely. [span]

       Continue to increase the exhaust back pressure: This is mainly because the safety valve discharge used less than the device's safety discharge, should be re select the appropriate safety valve;valve stem centerline is not correct or corrosion of the spring, the valve can not open to a certain height, the stem should be re assembled or replace the spring; exhaust pipe section has not,should be taken to meet the the safety area of the exhaust emissions.

Chains Belts Guide 

      Valve frequency hopping or vibration: mainly due to stiffness of the spring too. Should use the appropriate spring stiffness; adjustment ring to adjust properly, so that the pressure back seat is too high.Should re adjust the position of adjusting ring; discharge pipe resistance is too large, resulting in excessive emissions of back pressure. Should reduce the discharge pipe resistance.

     Less than the required opening pressure: mainly constant pressureis not allowed; spring stretch down the aging. Tighten the screws should be properly adjusted or replace the spring.

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