The ZMX pneumatic three-way cut-off valve adopts a top guide structure and is equipped with a multi spring actuator. It has the advantages of compact structure, light weight, sensitive action, S-shaped fluid channel, low pressure drop loss, large valve capacity, and easy disassembly and assembly. The cut-off valve receives signals from the regulating instrument to cut off, open or change the flow direction of the medium, achieving automatic control of process parameters such as pressure, flow rate, temperature or liquid level. Widely used in automatic and remote control systems for production processes in various industrial sectors such as petroleum, chemical, metallurgical, power, light industry, textile, etc.

This series of products comes in two types: film type and piston type. There are three types of valve body structures: single seat, sleeve, and double seat (two position three-way). The sealing forms include packing sealing and corrugated pipe sealing. The nominal pressure rating of the product is PN10, 16, 40, and 64, and the nominal diameter range is DN20-200mm. The applicable fluid temperature ranges from -60 to 450 ℃. The leakage level is IV or VI. The traffic characteristic is fast opening.

Material for main parts

Valve body and sealing sleeve: HT200, ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti
Valve core and seat: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti welded with Stellite alloy
Sleeve and valve plug: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti welded with Si Tai Cai alloy
Packing: polytetrafluoroethylene, flexible graphite
Corrugated film: Nitrile rubber clip reinforced polyester fabric
Spring: 60Si2Mn
Valve stem and push rod: 2Cr13, 1Cr18Ni9Ti
Valve core and plug (soft parts): reinforced polytetrafluoroethylene
Bellows: 1Cr18Ni9Ti

Main structural diagram