China Pneumatic Diaphragm Cage Type Control Valve

Pneumatic Diaphragm Cage Type Control Valve

Summary:
ZJHL pneumatic Diaphragm cage type control valve is mainly designed to reduce the noise of compressible fluid. In order to adapt to gas throttle diffusion and expansion, the sleeve is provided with many symmetrical holes to reduce the pressure difference. The fluid passage is "S" streamlined. Valve piug adopts pressure balanced structure. The flow characteristics of the valve are determined by the cage window curve. In addition, the sleeve is also provided with a guide fin to improve the smooth flow of fluid around the sleeve, so that the pressure loss is small, the flow is large, and the noise is small.

Pneumatic Diaphragm Cage Type Control ValveModelZJHLSizeDN25~300mmStructure FormStraight-through Casting TypeBody MaterialCast steel(WCB);Stainless Steel
(304;316;316L)Norminal PressurePN16; PN40; PN64MPaWorking Temperature -17~+50ºCApplication RangeOil, liquid, gas, steam and other media.FeatureLow voltage loss, high flow, low noise.ActionAir closing(B)-Air failure, valve to open(FO);
Air opening(K)-Air failure, valve to close(FC)AccessoryPosilioner/Air Filtralion /Pressure Reducing Valve /Transmilter/Handwheel

Body SpecificationMannerStraight-through Casting Ball Type ValveNominal diameterDN20~300mmFlange StandardJB/T79.1-94,792-94,etc.Body MaterialCast steel; Fluorine PTFE(F46)Working TemperatureStandard Type: -17-230°C ;Radiating Type:230-450°C;Low Temperature:-60-196°C; Bellows Seal Type:-40-350°CBonnet TypeBolted typePacking MaterialV-type PTFE Packing;PTFE+Graphite packing;Asbestos Textile Packing;
Graphite Packing.Structure FormCage Type

Components Valve TrimPlug TypeBalanced Pressure TypeFlow CharacteristicEqual Percentage Flow Characteristic;
Linear CharacteristicsPlug MaterialStainless Steel; Surfacing Stellite Alloy; Titanium, etc.

Actuator SpecificationMannerZHA/B Mutil-spring Diaphragm ActuatorDiaphragm materialEPDM+N; NBR+NRange of Spring(MPa)20-100(Standard);20-60; 60-100; 40-200; 80-240Supply Pressure(MPa)140-400Air connectionRC-1/4"Environment Temperature-30-70ºCModelZHA/B-22ZHA/B-23ZHA/B-34ZHA/B-45ZHA/B-56Active Area (cm²)3503505609001400

Advantages:
The sealing surface of pneumatic cage type control valve is composed of a metal sealing surface between the valve plug and the seat and a non-metallic elastic sealing structure between the cover and the cage. Graphite gasket is used in nonmetallic structure, and its elasticity and high temperature resistance are greatly improved! Apart from Good dynamic stability, low noise, air defense, it is suitable for controlling all kinds of temperature of high pressure differential fluid.
Company Introduction:
Zhitai Valve Co., Ltd is a member of Valve Association of Longwan District, is located in Longwan Central Industrial Zone, Wenzhou City. It'a professional technology company integrated with development, manufacturing, sales, and after-sales services of valve actuators and and self-controlled valves. Presently, our main products include: pneumatic actuators, pneumatic valves and pneumatic control valves; electric actuators, electeic valves and eletric control valves; automatic control products. Our products are widely applied in natural gas, electricity, petroleum, chemical, metallurgical, construction, pharmacy, paper, printing and dying. Zhitai series actuators and valves are the best choice for automatic fluid control engineering and equipment manufacturing. We sincerely welcome customers from home and abrode to visit us for supervision, communication and cooperation. It's a great honor for us to cooperate with you.