Overview of pneumatic piston cut-off valve:
The pneumatic piston cut-off valve consists of a cut-off mechanism and a pneumatic piston actuator. The cut-off mechanism is formed by a straight-through single seat, the DN20 valve core is a single guide, and the DN25~200 valve core is a double guide. It has the characteristics of simple structure, convenient operation, reliable use, and fast opening and closing. It is mainly used in liquid and gas media without impurities and particles, and requires fast and tight closing and fast venting in automatic control systems.
Main parts materials of pneumatic piston cut-off valve:
Part name Material
Valve body, valve cover ZG270-500, ZG1Cr18Ni9Ti
Valve stem, valve core 1Cr18Ni9
Sealing packing V-type polytetrafluoroethylene
Sealing gasket 1Cr18Ni9 sandwiched with asbestos sheet
Worm 45
O-ring Oil-resistant rubber
Compression spring 60Si2Mn
Bracket HT270
Worm gear box, worm gear, cylinder, bearing cover, piston HT200
Push rod 2Cr13
Model and specification of pneumatic piston cut-off valve:
Category Soft seal Hard seal
Normal temperature type Medium temperature type High temperature type Low temperature type
Model ZSPQ-40 ZSPQ-40G ZSPQ-40G ZSPQ-40D
Specification DN20~200
