Pneumatic membrane cut-off valve applications and features

Pneumatic membrane cut-off valve using guide structure, with many spring actuators. With compact structure, light weight, action quick, fluid channels in an s-shaped streamline, small pressure drop loss, large capacity of valve, convenient tear open outfit. Cut-off valve receives signals from the monitoring instrument, cut off the flow direction of medium, open or change, reach the pressure, flow, process parameters, such as temperature or liquid level automatic control. Widely used in petroleum, chemical, metallurgical, power, light industry, textile and other industrial sectors of production process automatic control and remote control system. Body structure with single seat, sleeve, two-seat ( Two three links) Three, sealed form has two kinds of packing seal and bellows seal, the nominal pressure level products are PN10, 16, 40, 64 four, nominal diameter range 3/4 '~ 200 mm. Apply fluid temperature by - 60～450℃。 Leakage of grade IV level or Ⅵ level. Flow characteristic of quick opening. The characteristics of the cut-off valve, cut-off valve adopts multiple spring actuator and regulating mechanism with three columns are linked together, the whole height is reduced by about 30%, the weight can reduce about 30%; Body according to the fluid mechanics principle designed to uniform the low flow resistance of fluid, rated flow coefficient increases by 30%; Trims sealing part has tight and soft seal two kinds, tight type for carbide surfacing, soft seal type for soft materials; Closed sealed performance is good; Balanced trims, enhanced the allowable differential shut-off valve; Bellows seal type of mobile stem form completely sealed, blocking off the possibility of a medium leakage; Large piston actuator, operating force, the use of differential pressure.