China Pneumatic Diaphragm Bellows Type Control Valve

Pneumatic Diaphragm Bellows Type Control Valve (ZJHP)

Summary:
Pneumatic bellows seal control valve consists of multi-spring pneumatic diaphragm actuator and bellows seal control valve. The bonnet adopts double structure of bellows and packing seal, which fundamentally eliminates the possibility of medium leakage, and it is suitable for extremely literacy, flammable, explosive and volatile, and toxic or precious medium flow pressure control. Besides, it also can be used for vacuum occasions.

Pneumatic Diaphragm Bellows Type Control ValveModelZJHPSizeDN25~300mmStructure FormSingle Seat and Cage GuideType;
Sleeve Balanced PlugBody MaterialCast steel(WCB);Stainless Steel
(304;316;316L)Norminal PressurePN16; PN40; PN64MPaWorking TemperatureBellows Seal Type: -40~+350ºCApplication RangeFlammable, explosive, volatile, and toxic, harmful and precious media.FeatureZero leakage, good sealing performance, long service life.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 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 FormBellows Seal Type

Components Valve TrimPlug TypeSingle Seat Plunger Type; Cage Guide Type; Sleeve Balanced Type.Flow 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:
Pneumatic bellows seal control valve adds a layer of protective film in the outside of sealing element, which prevents corrosive media direct to contact with the sealing element. In addition, when the medium pressure increases, the bellows elongate accordingly, reducing the impact of the medium on the sealing surface. In the corrosive medium condition, it can also uses double bellows structure seal.
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.