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Product Name:Bellow Sealed Gate Valve

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:

Application:

Zero stem emission

Solid wedge

Graphite stem packing secondary seal
Expanding seat ring
5,000 cycles bellow without failure

Refinery
Petrochemical
Solar energy power plant

Hot oil, steam supply
General Industry

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