Bellows Sealed Gate Valve

A bellows seal gate valve is a linear-motion isolation valve engineered for zero-leakage performance in high-pressure, critical-emission piping systems by replacing standard stem packing with a hermetically sealed metal bellows assembly. The multi-ply, flexible metal bellows is welded at one end to the valve stem and at the other to the bonnet. This creates a physical, pressure-retaining metallic barrier that expands and contracts as the gate raises or lowers, completely isolating the process media from the atmosphere and eliminating fugitive emissions. Secondary conventional graphite packing is retained above the bellows as a safety backup. Process safety engineers and compliance managers can eliminate hazardous emissions and minimize stem maintenance by importing certified bellows seal gate valves directly from leading manufacturers in China via our advanced B2B digital marketplace.