The advantages of pneumatic cut-off valve and classification is introduced

Pneumatic cut-off valve and classification is introduced, the advantages of pneumatic cut-off valve belongs to a kind of valve, contribution is large, generally used in oil, metallurgy and other industries, and has many advantages, such as reliable operation, simple structure, etc. A, 1, balance the advantages of pneumatic cut-off valve is introduced type trims, improve the allowable differential shut-off valve; Type 2, bellows seal for mobile stem form completely sealed, blocking off the possibility of a medium leakage; 3, piston actuator, operating strength, using the pressure difference is big. 4, 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 5, 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%; 6, the body according to the fluid mechanics principle designed to uniform the low flow resistance of fluid, rated flow coefficient increases by 30%; 7, 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; Second, according to the classification of pneumatic cut-off valve 1, medium leakage and security considerations, can choose hard seal, soft seal and seal corrugated pipe cut-off valve, such as; 2, according to the requirement of process control, can match the following attachments: the handwheel, air filtration pressure reducer, quick exhaust valve, solenoid valve, travel switch, etc. 3, according to the allowed pressure differential, medium characteristics and process piping requirements, can choose single seat, sleeve, tee shut-off valve; 4, according to the pressure situation, can choose nominal pressure for the PNl. 6Mpa，PN4. 0Mpa，PN6. 4 mpa shut-off valve; 5, according to the request of medium corrosion resistance and pressure classes, can choose cast iron, cast steel, cast stainless steel, cast alloy steel material such as cut-off valve; 6, according to the medium temperature and special requirements, standard, high temperature (optional Cooling) Type, low temperature type, jacket type insulation cut-off valve.