Chengrui pneumatic film shut-off valve main parts and materials
Valve body, sealing sleeve: HT200, ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti
Valve core, valve seat: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti surfacing stellite alloy
Sleeve, valve plug: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti surfacing welding
Filler: polytetrafluoroethylene, flexible graphite
Corrugated diaphragm: nitrile rubber clip reinforced polyester fabric
Spring: 60Si2Mn
Valve stem, push rod: 2Cr13, 1Cr18Ni9Ti
Spool, valve plug (soft parts): reinforced PTFE
Bellows: 1Cr18Ni9Ti
Chengrui pneumatic film shut-off valve features
The shut-off valve uses a multi-spring actuator and the adjustment mechanism is connected by three columns, the overall height can be reduced by about 30%, and the weight can be reduced by about 30%.
The valve body is designed according to the principle of fluid mechanics as an equal-section low-flow resistance flow path, and the rated flow coefficient is increased by 30%.
The inner part of the valve has two kinds of tight and soft seals. The tight type is hard-welded hard alloy, the soft seal type is made of soft material, and the sealing performance is excellent when closed.
Balanced trims increase the allowable differential pressure of the shut-off valve.
The bellows seal type forms a complete seal on the moving stem, blocking the possibility of leakage of the medium.
The piston type actuator has large operating force and large differential pressure.
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