What's the advantage of pneumatic cut-off valve?

Pneumatic cut-off valve, pneumatic cut-off valve, also known as it is a kind of automation system of actuators, pneumatic diaphragm actuator or by a more spring floating piston actuators and pneumatic control valve, the reception of the regulating instrument signal, fluid control technology of the pipe on the cut, or switch. It has a simple structure, sensitive reaction, reliable operation, etc. Can be widely used in petroleum, chemical, metallurgical and other industrial production. Pneumatic cut-off valve of air required by the compressed air filter, flowing through the valve body is supposed to be free of impurities and particles of the medium of liquid and gas. Advantage 1, the body structure has a 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; More than 2, the 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%; 3, the body according to the fluid mechanics principle design into the low flow resistance of fluid, cross section of the rated flow coefficient increases by 30%; Part 4, trim seal has tight and soft seal two kinds, tight type carbide surfacing, as soft seal type for soft materials, closed sealed performance is good; 5, balanced trims, enhanced the allowable differential shut-off valve; 6, bellows seal type of mobile stem form completely sealed, blocking off the possibility of a medium leakage; 7, piston actuator, operating strength, using differential pressure is big.