How to handle a leaking safety valve

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A safety valve leak occurs when, at normal operating pressure, there is an excess leakage between the valve disc and the valve seat sealing surface. ① Dirt falling on the sealing surface can also cause this issue. The valve can be opened several times using a lifting wrench to flush out the dirt. ② Damage to the sealing surface. Repair should be carried out by grinding or by grinding after turning, depending on the degree of damage. After repair, it is necessary to ensure the flatness of the sealing surface; its surface roughness should be no less than Rz0.1. ③ Due to improper assembly or pipeline loads, etc., the concentricity of the components may be compromised. Seepage due to excessive load; additional loads from newly installed or connected pipelines. ④ The opening pressure of the valve is too close to the normal operating pressure of the equipment, resulting in insufficient pressure on the sealing surface. Leaks are likely to occur when the valve is subjected to vibration or fluctuations in medium pressure. The opening pressure should be adjusted appropriately according to the strength conditions of the equipment. ⑤ Spring relaxation leads to a decrease in the set pressure, thereby causing leakage in the valve. It may be caused by high temperatures or corrosion, etc.; the spring should be replaced or the valve should be changed (if the selection was incorrect). Since it is caused merely by improper adjustment, simply tighten the adjustment screw properly