Product description

During the operation of the 500X fire pressure relief valve in the water supply system, the flow direction of the main pipeline is from left to right, and water is controlled all the way into the pilot valve control room. When the water pressure is less than the set pressure relief value, the thrust of the pilot valve spring is greater than the water The pressure of the pilot valve disc is in the closed state. Another way of empty water enters the upper cavity of the main valve through the throttling needle valve to generate a static pressure, and the pressure in the upper cavity is equal to the pressure in the raw runner. Since the upper plane of the main valve flap is larger than the lower plane, the pressure of the upper cavity on the valve flap is greater than the pushing side of the valve flap by the water in the main flow channel, so that the main valve is in a closed state.

Product size chart

Main external connection size