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Product Name:Bellow Sealed Gate Valve

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Leakage from the valve gland is often a problem for environment protection & sometime it is quite dangerous if such leakage is from a hazardous fluid or gas. KOS bellow seal valves are designed with a bellow cartridge which welded to the valve bonnet and stem, so that when the stem up & down movement makes the bellows expands & compress. Therefore there is no sliding or rotating seals through which process fluid can leak.
Design Standard:
Design and Manufacture: API 602, ASME B16.34, BS 5352
Face to Face Dimension: ASME B16.10, EN558 (Threaded Ends and Socket Welded ends as per manufacture's specification)
Flange Connection Dimension: ASME B16.5
BW Connection Dimension: ASME B16.25
Threaded Ends Dimension: ASME B1.20.1
Socket Welded Ends Dimension: ASME B16.11
Pressure-Temperature Ratings: ASME B16.34
Test & Inspection: API 598
Products Range:
Size:           NPS 1/2" ~ 2"
Rating:          ANSI 150lb ~ 1500lb
Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Bellow materials: SS304, SS316L, SS321, Inconel, Hastelloy C276
Trim:            Per API 600
Operation:       Handwheel, Gear, Motorized, Pneumatic
Design Feature:
Zero stem emission
Solid wedge
Graphite stem packing secondary seal
Expanding seat ring
5,000 cycles bellow without failure
Solar energy power plant
Hot oil, steam supply
General Industry