Product Code : VF--DDW-N32-CU
Product overview
WJ641Y series pneumatic bellows globe valve is a kind of high performance, no leakage, long life globe valve. It uses a soft, corrosion-resistant, high-temperature double metal bellows sealing structure to effectively prevent process fluid corrosion of the valve stem, especially suitable for steam, thermal oil and toxic media in high-risk places
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Scope of application
steam
Inflammable and explosive
Heat transfer oil
Toxic media
peculiarity
Internal structure: adopts the bellows structure, the lower end of the stainless steel bellows is welded on the valve stem, and the other end is placed between the valve body and the valve cover to form a static seal.
Double seal: stainless steel bellows protection seal, stem packing protection seal, if the bellows fail, stem packing will also avoid leakage.
High temperature and high pressure no leakage: in the case of high temperature and high pressure, the medium can still maintain no leakage.
Long service life: reduce the number of maintenance, reduce operating costs.
Clean and safe working environment: no external leakage and no internal leakage phenomenon, reduce energy loss, improve plant equipment safety
Technical parameter
Nominal diameter: DN15 ~ DN300(MM)
Nominal pressure: PN25bar
Connection type: flange connection
Structure: straight through type
Drive form: pneumatic control (compressed air)
Body material: carbon steel WCB
Applicable temperature: -40℃ ~ 450℃
Seal form: bellows seal
Applicable media: steam, flammable and explosive, heat conduction oil, toxic media, etc
Control mode: double action (gas on, gas off)
The difference with ordinary globe valve
Sealing structure: electric bellows stop valve adopts closed bellows instead of packing seals to effectively prevent external leakage; Ordinary globe valves use packing seals and are prone to leakage.
Applicable medium: electric bellows globe valve is suitable for transmission of permeable medium, such as hydrogen system; Ordinary stop valves are more used for general industrial fluid control.
Installation and maintenance
Install
Make sure the flange is securely connected and the gasket is intact.
Select the appropriate sealing material according to the characteristics of the medium
Packing of Standard Packing:
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. ATTs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
