One safety valve leakage fault.
The main reason: (1) valve core and valve seat contact surface is not tight;
(2) valve core and valve seat contact surface with dirt;
(3) stem deflection.
Fault two to provide the pressure relief valve does not open
The main reason: (1) to the valve core and valve seat, do manual exhaust test exclusions;
(2) the spring pressure adjusting spring safety valve is too large, should adjust;
(3) the hammer lever safety valve should be moving backward, the weight shift to the original constant pressure position, with the limit screw fastening.
Fault three does not require a pressure relief valve opening.
The main reason: (1) the spring pressure adjusting spring safety valve spring failure is not enough, inadequate or stretch, should be reset or replace safety valve;
(2) lever-type safety valve hammer hammer moves forward, should be moved to the original constant pressure position, with the limit screw fastening.
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