Pneumatic three-way shut-off valve

Pneumatic three-way shut-off valve

ZMQ and ZSQ pneumatic diaphragm (piston) cut-off valves adopt a top guide structure and are equipped with multiple spring actuators. 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, and liquid level. Widely used in production process automatic control and transportation control systems 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 46, 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.

The pneumatic three-way cut-off valve adopts a multi spring actuator and a regulating mechanism connected by three vertical poles, which can reduce the entire height by about 30% and the weight by about 30%.
The valve body is designed according to the principles of fluid mechanics as a low flow resistance channel with equal cross-section, increasing the number of rated flow systems by 30%.
There are two types of sealing parts for valve internals: tight type and soft type. The tight type is made of hard alloy welding, while the soft type is made of high-quality materials, with excellent sealing performance when closing.
◇ Balanced valve internals increase the allowable pressure difference of the shut-off valve.
The bellows sealing type forms a complete seal for the moving valve stem, blocking the possibility of medium leakage.
Piston type actuator, with high operating force and large pressure difference.

阀体、密封套筒： HT200、ZG230-450、ZG1Cr18Ni9Ti、ZG1Cr18Ni12MO2Ti
Valve core and seat: 1Cr18Ni9T, OCr18Ni12MO2Ti, 1Cr18Ni9Ti welded with Stellite alloy
Sleeve and valve plug: 1Cr18Ni9T, OCr18Ni12MO2Ti, 1Cr18Ni9Ti welded with Stellite alloy
Packing: polytetrafluoroethylene, flexible graphite
Ripple 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