Bellow Sealed Valve

Bellow seal valve is designed with bellow welded onto the bonnet and stem, so that when the stem travels drive the below expansion or decompression. It inherently eliminate the conventional design of possible stem packing leakage. YDF bellow sealed valves can achieve truly zero leakage; ideal for stringent leakage-free application like toxic and flammable services. 

 Design Feature


Product Range

Formed bellow
10,000 cycles failure-free tested
Stem bellow & packing double seal design
Zero stem leakage guarantee



Gate, Globe




150 ~1500LB(PN16~PN250)

Body Materials

Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel

Bellow Materials

Stainless Steel, Inconel, Hastelloy

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