Zjhitai Pneumatic Diaphragm Bellows Type Control Valve

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, ISO9001
• Model NO.: ZHITAI
• Media: Gas, Oil
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Stainless Steel
• Type: Self-Operated
• Transport Package: Wooden Packing
• Specification: DN20~250mm
• Trademark: ZT
• Origin: China
• HS Code: 8486902000
• Production Capacity: 50000pieces/Year

Product Description

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 Valve
Model	ZJHP
Size	DN25~300mm
Structure Form	Single Seat and Cage GuideType; Sleeve Balanced Plug
Body Material	Cast steel(WCB);Stainless Steel (304;316;316L)
Norminal Pressure	PN16; PN40; PN64MPa
Working Temperature	Bellows Seal Type: -40~+350ºC
Application Range	Flammable, explosive, volatile, and toxic, harmful and precious media.
Feature	Zero leakage, good sealing performance, long service life.
Action	Air closing(B)-Air failure, valve to open(FO); Air opening(K)-Air failure, valve to close(FC)
Accessory	Posilioner/Air Filtralion /Pressure Reducing Valve /Transmilter/Handwheel

 

Body Specification
Manner	Straight-through Casting Valve
Nominal diameter	DN20~300mm
Flange Standard	JB/T79.1-94,792-94,etc.
Body Material	Cast steel; Fluorine PTFE(F46)
Working Temperature	Standard Type: -17-230°C ;Radiating Type:230-450°C;Low Temperature:-60-196°C; Bellows Seal Type:-40-350°C
Bonnet Type	Bolted type
Packing Material	V-type PTFE Packing;PTFE+Graphite packing;Asbestos Textile Packing;  Graphite Packing.
Structure Form	Bellows Seal Type

 

Components Valve Trim
Plug Type	Single Seat Plunger Type; Cage Guide Type; Sleeve Balanced Type.
Flow Characteristic	Equal Percentage Flow Characteristic; Linear Characteristics
Plug Material	Stainless Steel; Surfacing Stellite Alloy; Titanium, etc.

 

Actuator Specification
Manner			ZHA/B Mutil-spring Diaphragm Actuator
Diaphragm material			EPDM+N; NBR+N
Range of Spring(MPa)			20-100(Standard);20-60; 60-100; 40-200; 80-240
Supply Pressure(MPa)			140-400
Air connection			RC-1/4"
Environment Temperature			-30-70ºC
Model	ZHA/B-22	ZHA/B-23	ZHA/B-34	ZHA/B-45	ZHA/B-56
Active Area (cm²)	350	350	560	900	1400

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.