General Description: 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 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, EN13709

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

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

Flange Connection Dimension: ASME B16.5

BW Connection Dimension: ASME B16.25

NPT Ends Dimension: ASME B1.20.1

Socket Welded Ends Dimension: ASME B16.11

Test & Inspection: API 598, EN12266

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

Rating:          ANSI 150lb ~ 900lb (PN 16 ~ PN150)
Body Materials:  Carbon Steel, Stainless Steel, Cr-Mo Alloy Steel, Duplex Steel

Bellow materials:  SS304, SS316L, SS321, Inconel, Hastelloy C276
Trim:            Per API 600
Operation:       Handwheel, Gear, Motorized, Pneumatic

Zero stem emission

Flexible graphite stem packing secondary seal
Welded seat ring or integral body seating surface
8,000 cycles bellow without failure

Non-rising stem

Refinery
Petrochemical
Solar energy power plant

Hot oil, steam supply, thermal industry
General Industry