Common Faults and Cause Analysis of Safety Valves in Gas Storage Tanks

Common faults, causes, and solutions for air storage tank safety valves include: Kaishan brand screw compressor customized air storage tank jacket container, Kaishan air compressor, Kaishan pressure vessel ASME certified air storage tank, CE certified air storage tank, EAC certified air storage tank, DOSH certified air storage tank, MOM certified air storage tank, ASME certified pressure vessel, CE certified pressure vessel, EAC certified pressure vessel, DOSH certified pressure vessel, MOM certified pressure vessel, ASME certified accumulator tank, CE certified accumulator tank common faults, causes, and solutions:

1. Frequent air leakage: main causes include: poor sealing between valve seat and valve core, worn sealing surfaces, deposits and dirt; spring deformation; displacement of the hammer position on the lever type; skewed support surface of valve seat or valve core; bent lever or valve stem; valve core not returning to original position after lifting and pressure reduction. Solutions mainly include: replacing valve seat or valve core, blowing and cleaning the safety valve, removing debris; replacing the spring; repositioning the hammer correctly; checking lever alignment for straight movement; properly installing the exhaust pipe and cleaning rust and debris.

2. Reaching opening pressure but not opening: main causes and solutions include:

(1) When the hammer moves to the end of the lever, or the spring is too tight or the spring pressure range is inappropriate, adjust the hammer position, properly loosen the spring, or replace the spring.

(2) When the valve seat and valve core are stuck or rusted, perform a manual lift exhaust test or slowly turn the valve body with a wrench; grind the valve core and valve seat to ensure proper sealing.

(3) If the gap between the valve stem and the casing is too small and gets stuck due to thermal expansion, appropriately increase the gap between the valve stem and the casing.

(4) If installation issues are the cause, remove the safety valve and reinstall it. If the valve inlet passage is blocked by debris or the blind plate is not removed, clear the obstruction and remove the blind plate.

(5) Remove any inappropriate heavy objects on the lever.

(6) If leakage caused by poor sealing between the valve core and valve seat reduces the pressure acting on the valve core, eliminate the leakage.

3. Opening prematurely before reaching the opening pressure: main causes and solutions include:

(1) Due to insufficient distance between the hammer of the lever safety valve and the valve core fulcrum, or the spring adjustment nut not tightened properly, the safety valve is not adjusted timely. Re-adjust correctly from the beginning to set the spring pressure to the required value.

(2) If the hammer is not fixed properly, fix it again from the beginning.

(3) If the pressure gauge has not been calibrated for a long time and the indication error increases, replace the pressure gauge.

(4) If the safety valve assembly does not meet requirements after disassembly and maintenance, replace or reinstall it.

4. Slow reseating of the safety valve core: main causes and solutions include:

(1) If the safety valve's technical performance is poor and the reseating pressure does not meet specifications, replace the safety valve.

(2) If the spring performance decreases or the hammer moves after the lever safety valve opens, replace the spring or adjust the safety valve hammer.

(3) If the safety valve's exhaust capacity is small and pressure reduction is too slow, recalibrate or replace the safety valve.