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Emergency shutdown valve
Model:
JY741X
Specifications:
DN20-DN600
Applicable temperature:
≤ 80 ℃
Applicable medium:
Water
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- Product Description
- Detailed parameters
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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.
Warm tips:
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Contour and connection dimensions of emergency shut-off valve
DN L A A1 H H1 F 20 180 282 200 172 106 116 25 180 282 200 172 106 116 32 180 282 200 172 106 116 40 240 320 210 265 210 170 50 240 320 210 265 210 170 65 250 330 215 310 215 180 80 285 350 220 350 245 210 100 360 410 230 460 305 275 125 400 420 245 520 365 310 150 455 430 260 570 415 355 200 585 440 280 695 510 460 250 650 450 300 780 560 500 300 800 460 320 905 658 580 350 860 470 340 1025 696 640 300 800 460 320 905 658 580 350 860 470 340 1025 696 640 400 960 480 360 1080 735 715 450 1075 530 395 1030 210 780 500 1075 580 420 1135 665 830 600 1230 600 445 1270 725 920 700 1650 730 495 1460 865 980 800 1750 830 530 1640 925 1050