» Diaphragm Valve » Pneumatic Normally Open Diaphragm Valve

Pneumatic Normally Open Diaphragm Valve

The normally open pneumatic diaphragm valve is specially used to control non-corrosive or general corrosive media. The surface of the valve body is not lined or covered with various rubbers for selection.

  • Description

Pneumatic Normally Open Diaphragm Valve

Introduction:

The normally open pneumatic diaphragm valve is specially used to control non-corrosive or general corrosive media. The surface of the valve body is not lined or covered with various rubbers for selection. It is suitable for different working temperatures and fluid pipelines. Applicable temperature: ≤85℃, ≤100℃, ≤120℃, ≤150℃ (according to lining and diaphragm material).

Working Principle:

Normally open pneumatic diaphragm valve is closed when ventilated, and opened when gas is cut off. The opening and closing are realized by the up and down movement of the valve stem driven by the pneumatic actuator. When the valve stem is in the upper position, the spherical diaphragm bends the valve upward to form a conducting state. When the valve stem moves from top to bottom, it drives the valve core to bend the diaphragm, forcing the diaphragm to close to the valve seat area or close the pipeline fluid passage.

Outline Drawing:

Main Parameters:

Nominal Size(mm)  Specific Size(mm) Pneumatic Device Weight(kg)
L D1 D n-d H1 D0 Gas consumption (cm3) Gas Pressure(MPa)
25 145 85 115 4-13.5 306 120 2.395*10² 0.4 7.5
32 160 100 140 4-17.5 306 140 6.082*10² 0.4 14.3
40 180 110 150 4-17.5 415 140 6.082*10² 0.4 16.5
50 210 125 465 4-17.5 458 160 1.235*10³ 0.4-0.5 24
65 250 145 180 4-17.5 458 160 3.725*10³ 0.4-0.5 30
80 300 160 200 4-17.5 642 200 3.725*10³ 0.4-0.5 51
100 350 180 220 8-17.5 710 240 9.458*10³ 0.4-0.5 92
125 400 210 250 8-17.5 804 320 1.409*104 0.4-0.5 148
150 460 240 285 8-22 920 320 2.868*104 0.5 200
200 570 295 340 8-22 1145 400 4.619*104 0.5 275

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