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Papua New Guinea Emergency shutdown valve
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Product Description
Emergency shutdown valve is a kind of hydraulic control valve. It is composed of main valve, throttle valve, pilot valve, pressure gauge and other pipe fittings. When the inlet pressure of the main valve is lower than the pressure set by the pilot valve, the pilot valve is in the open state at this time. The pressure in the upper cover cavity of the main valve is equal to the outlet pressure of the main valve. There is a pressure difference between the inlet and the outlet, and the water flows out from the outlet through the valve port. When the fire pump starts or the pressure of the variable frequency pump rises and exceeds the set pressure of the pilot valve, the pressure of the control pipe from the inlet of the main valve to the pilot valve rises, and the pressure acting on the spring increases and presses down to drive the valve core to move down to close the pilot valve. At this time, the inlet pressure of the main valve is continuously supplemented to the upper cavity of the main valve cover through the throttle valve. Because the downward pressure on the valve flap is greater than the upward thrust, the main valve, the main valve is closed. Please note that the key point is that the inlet pressure is less than the set pressure of the valve has been open, the inlet pressure is greater than the set pressure, the valve is closed.
Emergency shutdown valve is mainly composed of main valve 2, check valve 5, needle valve 1 and ball valve 3, pressure valve table 4, etc. The emergency shut-off valve is used in the water supply system in parallel with domestic water for fire protection in the living area. When the fire water valve automatically emergency shut down domestic water and fire water. When the fire is over, the valve opens automatically to restore the living water supply. More cost savings than traditional fire separate water supply. The emergency shut-off valve should be installed before the filter, and should be easy to sewage requirements.
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