ZMQ-type pneumatic film shut-off valve with a top-oriented structure, with a multi-spring actuator. With a compact structure, light weight, sensitive action, the fluid channel was S streamlined, the pressure drop is small, the valve capacity, easy disassembly and so on. The shut-off valve accepts the signal from the adjustment instrument, cuts off, turns on or changes the flow of the medium, and automatically controls the process parameters such as pressure, flow, temperature or level. Widely used in petroleum, chemical, metallurgical, power, light industry, textile and other industrial sectors of the production process of automatic control and remote control system.

This series of products are thin film, piston type two. The body structure has a single seat, sleeve, two-seat (two three links) three, sealed in the form of sealing and sealing bellows two kinds of products, the nominal pressure level PN10,16,40,64 four, nominal caliber Range DN20 ~ 200mm. Applicable fluid temperature from -60 ~ 450 ℃. The leak level is grade IV or grade VI. The flow characteristics are fast.

Features 
The shut-off valve is connected with three columns with a multi-spring actuator and adjustment mechanism. The 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, and the rated flow coefficient is increased by 30%. 
Throttle parts are tight and soft seal two, tight type for the welding carbide, soft seal for the soft material production, close the sealing performance. 
Balanced trim has improved the allowable pressure differential of the shut-off valve. 
Bellows seal type on the movement of the stem to form a complete seal, blocking the possibility of media leakage. 
Piston actuator, operating force, the use of large pressure. 

Main parts materials 
Body, Sealed Sleeve: HT200, ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti 
Spool, seat: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti stacking Division Tai Lai alloy 
Sleeve, valve plug: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti stacking plant Taicai alloy 
Filler: Teflon, flexible graphite 
Corrugated film: nitrile rubber clip reinforced polyester fabric 
Spring: 60Si2Mn 
Stem, putter: 2Cr13, 1Cr18Ni9Ti 
Spool, spool (soft): reinforced polytetrafluoroethylene 
Bellows: 1Cr18Ni9Ti 

Ordering instructions 
1. Product model and name 2. Nominal diameter DN (mm 3. Nominal pressure 4. Flow characteristics requirements 5. Body material and trim materials 
6. Media type and temperature range 7. Valve before and after the pressure (pressure) 8. Seal form 9. Supporting accessories, it is recommended that users install the air filter triple and two five-way solenoid valve