ZMX pneumatic three-way cut-off valve adopts top guiding structure with multi-spring actuator. The utility model has the advantages of compact structure, light weight, sensitive action, S-streamlined fluid passage, small pressure drop loss, large valve capacity, convenient disassembly and assembly, etc. The cut-off valve receives the signal from the regulating instrument, cuts off, opens or changes the flow direction of the medium, and achieves automatic control of process parameters such as pressure, flow, temperature or liquid level. It is widely used in automatic control and remote control system of production process in petroleum, chemical, metallurgical, electric power, light industry, textile and other industrial sectors.

  This series of products have film type and piston type. There are three kinds of valve body structure: single seat, sleeve and two seats (two-position three-way). There are two kinds of sealing forms: packing seal and bellows seal. The nominal pressure grades of products are PN10, 16, 40 and 64, and the nominal caliber range is DN20-200 mm. The applicable fluid temperature ranges from - 60 to 450 C. Leakage level is IV or VI. The flow characteristic is fast opening.

Major Parts Materials

Valve body, sealing sleeve: HT200, ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti

Core and seat: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti surfacing Stellay alloy

Sleeve and Plug: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti Surfacing Stachy Alloy

Filler: PTFE, Flexible Graphite

Corrugated diaphragm: NBR clip reinforced polyester fabric

Spring: 60Si2Mn

Stem and Push: 2Cr13, 1Cr18Ni9Ti

Core, Plug (Software): Reinforced PTFE

Bellows: 1Cr18Ni9Ti

Major structural maps