General Description: Leakage from the valve gland is often a problem for environment protection & sometimes it is quite dangerous if such leakage is from a hazardous fluid or gas. KOS bellow sealed valves are designed with a bellow cartridge which welded to the valve bonnet and stem, when the stem up & down movement makes the bellow expands & compress. Therefore there is no sliding or rotating seals through which process fluid can leak.

Design and Manufacture:        API 602, BS 5352

Face to Face Dimension:        ASME B16.10, EN558-1

 (Note: Threaded Ends and Socket Welded ends as per manufacture's specification)

Flange Connection Dimension:    ASME B16.5, EN 13709-1

BW Connection Dimension:       ASME B16.25

Threaded (NPT) Ends Dimension:       ASME B1.20.1

Socket Welded Ends Dimension:  ASME B16.11

Pressure-Temperature Ratings:   ASME B16.34

Test & Inspection:               API 598, EN12266,

Size:            NPS 1/2" ~ 2" (DN15 ~ DN50)

Rating:          ANSI 150lb ~ 900lb (PN16 ~ PN150)
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

Zero stem emission

Solid wedge

Flexible graphite stem packing secondary seal
Expanding seat ring
5,000+ cycles bellow without failure

Refinery
Petrochemical
Solar energy power plant

Hot oil, steam supply, thermal industry
General Industry