Relief valve adjustment valve discharge pressure and return pressure must reach the valve opening height test, therefore, only after large capacity test equipment or relief valve is installed on protected equipment may only be carried out. The adjustment method is different from the valve.
After each adjustment screw should be screwed on, so, adjusting the two teeth between the ring grooves can prevent the adjustment of the end of the ring without adjusting the radial pressure of the ring. For safety reasons, before touching the adjustment ring, the inlet pressure of the safety valve should be appropriately reduced (generally lower than 90% of the opening pressure) to prevent accidents before the adjustment valve suddenly opens.
For the structure of the upper and lower adjustment rings (the guide sleeve and seat have an adjustable ring), the adjustment is more complicated. Sit into the disc channel with the size of the adjusting ring and change the size of the adjusting ring when the valve disc degree of opening initial pressure accumulates in the chamber with the size of the adjusting ring. When the elevated seat adjusts the ring, the pressure build-up level increases, lowering the proportional valve opening phase, which quickly reaches a sudden sharp opening. Therefore, the added seat adjustment ring can lower the discharge