Safety Valve Testing and Set Pressure Adjusting

GOOLE safety valve link

【Safety Valve Testing Guide】

The Safety Valves that our company offered, are tested under normal temperature according to the Standard. But because of the temperature difference between the exact working condition and the normal testing, it will cause the setting pressure’s deviation under these two different circumstances. Then Pressure Testing under high temperature is necessary for the safety valves which are used in the condition with big temperature differences. This testing contains the adjusting of setting pressure, relieve pressure and back seat pressure. In the following, you can find the detailed exemplifications for two types of our products

【The Adjusting of the Safety Valve's Setting Pressure】

Open the top seal, remove the lever and the valve cap, unfasten the lock nut, then rotate the adjusting screw to change the decrement of the spring under its working pressure range so as to adjust the setting pressure. While adjusting, increase the valve’s inlet pressure slowly to make the valve open for one time. If the opening pressure is on the low side, then relief the inlet pressure and rotate the adjusting screw clockwise. If the working pressure is on the high side, then rotate the adjusting screw counterclockwise. When approaching the needed working pressure, then tight the lock up and assemble the valve cap. If the demanded working pressure is beyond the working pressure of the spring, then the spring should be replaced by another spring with different pressure ranges and the valve’s setting pressure should be readjusted again. After changing the spring, the data on the nameplate should be changed accordingly.