Bellows-Sealed Globe Valve

The bellows-sealed globe valve places a metal bellows between the stem and the body as the primary seal, completely isolating the medium in the stem movement area from the outside. Together with graphite packing it forms a dual seal that eliminates external leakage at the packing, making it a critical valve for conveying toxic, flammable, volatile and valuable media. The bellows is made of corrosion-resistant materials such as 316L/Inconel and passes helium mass-spectrometer leak testing. Combined with an anti-blowout stem and live-loaded packing, low fugitive emission designs can be supplied to the classification requirements of ISO 15848-1. It is widely used in steam, heat-transfer oil, ammonia, chlorine and hazardous chemical lines.

· Metal bellows plus packing dual seal, no stem leakage · Eliminates fugitive emissions at the packing · Bellows helium leak-tested, no external leakage risk · Anti-blowout stem design · Low fugitive emission design available to ISO 15848-1 classes · Suitable for toxic, flammable and volatile media

For lines carrying toxic, flammable and volatile media in steam, heat-transfer oil, ammonia refrigeration, chlor-alkali and petrochemical plants, used in critical isolation and regulation duty requiring zero external leakage.