Bellows sealed valve is the valve with bellows as stem sealing components, often used where need strict requirements for stem sealing such as the occasion for high vacuum or nuclear industry. The bellows can eliminate the impact of back pressure fluctuations on the valve and protect springs and other internals from corrosion and leakage by flow media. Instead of stuffing box or worked with stuffing box, the bellows are welded with a cover or other parts by rolling welding or argon arc welding. Perfect mainly supply bellows sealed globe valves and bellows gate valves.

As a leading industrial valve manufacturer and supplier, PERFECT produce a series of bellow sealed valve for sale to meet the most severe requirements of challenging temperature flow media. Our bellow sealed valve is available from ANSI 1500 class up to 2500 pressure and We can also accept the OEM design, so whether you need special valves or have a large order to place, we can provide you with the customized service for you. Please review the charts below for available sizes & pressure & material or fill the contact form below.

  • Bellows seal design offers reasonable structure, excellent performance and long service life;
  • Sealing surface welding Co hard alloy, good wear resistance, corrosion resistance and abrasion resistance;
  • Double seal design (bellows + packing) to prevent leakage of media, even if the bellows fail, stem packing will be avoided;
  • Bellows seal stem completely eliminates the common valve stem packing seal aging quickly leak shortcomings to ensure zero stem leakage.

Bellow sealed control valve design

Application Fluid regulation and control
Design Standard
  • API 6D
  • API 6A
  • ASME B16.34
F to F Standard ASME B16.10
Testing Standard API 598
End Connection Standard ASME B16.5
  • NPS 3/4″~12″(DN20~DN300)
Pressure Class Range:
  • ASME Class 150~2500
Ends Flange End, Butt weld, Screwed End
  • Body: WCB, CF8, CF8M, LCC, Hast Alloy,  Super Duplex, LCB, etc
  • Disc: WCB, CF8, CF8M, Hast Alloy, Super Duplex, LCB, etc
  • Seat: Delvon, EPDM, Nitrile, PTFE, PEEK etc

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