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Product Name:DIN-EN 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: EN 1984, DIN 3352
Face to Face Dimension: EN558-1, DIN3202
Flange Connection Dimension: EN1092, DIN2544 PN25, DIN2545 PN40, DIN2546 PN64
BW Connection Dimension: EN 12627
Test and Inspection: EN12266, ISO5208
Products Range:
Size:            DN50 ~ 1200 PN 16/25/40; DN50 ~ 600 PN 64/110/150;
Rating:          ANSI 150lb ~ 600lb; PN 16 ~ 150
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
Flexible wedge
Graphite stem packing secondary seal
Threaded or welded seat ring
5,000 cycles bellow without failure
Refinery
Petrochemical
Solar energy power plant
Hot oil, steam supply
General Industry