at the beginning of the corrugated pipe cut-off valve by the full open position closing phase, with declining disc, and fluid in the disc caused by pressure difference before and after, to prevent the disc, and the resistance increased rapidly with the disc down. When the

Industrial Valves seated, before and after the disc pressure differential is equal to the work medium pressure, maximum resistance. Then forced sealing force, increase the operating force of cut-off Industrial Valves closing moments soon. In the process of open valve, due to the medium pressure

force or disc pressure difference before and after the thrust is to help open valve. It should be noted that at the moment of valve open torque may be more than the moment when closing valves, because at this time to overcome large static friction force.

the corrugated pipe cut-off valve opens, the opening of the disc height reach cut-off Industrial Valves nominal diameter of 25% ~ 30%, the flow that has reached maximum, namely that cut-off valve has reached the full open position, so stop valve fully open position should be

by disc to determine. The situation of the cut-off valve is closed and locked open again after similar to mandatory sealed gate valve, therefore, cut-off valve in the closed position should increase to the specified value to determine according to the operating torque.

three characteristics of corrugated pipe cut-off valve

1, corrugated pipe cut-off valve, long service life, reduce the number of maintenance, lower operating costs. 2, strong and durable bellows seal design, guarantee the zero leakage of the stem, provide no maintenance conditions. 3, gas medium PTFE seat is soft sealing material to improve the valve's sealing;

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