Extended Body Gate Valve

KOSEN Cryogenic Gate valve refers to the valve with working temperature below -110Degree C and widely used in area of LNG, LPG and other cryogenic medium. There are two different types of bonnet designing. One is bolted bonnet, i.e. the body is connected with bonnet by bolts & nuts with spiral wound gasket(If required, metal ring gasket could be provided) between. And the other type is welded bonnet, i.e. the bonnet is welded to body directly. Cryogenic Gate valve is used to connect pipe and fitting or its accessories. Flanged connection has the features of easy installation, good connection strength and good excellent sealing performance. The flange connection consists of flanges, bolts, nuts and gasket. When we fasten the connecting bolts, it would press the sealing gasket between the flange which would have elastic deformation and fill all the small space between the two flanges' sealing face, thus to realize the good sealing.

KOSEN Forged Steel Gate Valves are suitable for using on various kinds of pipeline cut off or connect the flowing of medium. By using different material, the valves could be suitable for medium such as water, steam, oil, nitric acid, acetic acid, oxidizing substance, carbamide and etc. Molded flexible graphite is used for packing of Female Threaded Gate Valve. PTFE or combined packing material can be also used if being requested by the customer. The internal surface of the stuffing box, of which area is contacted with the packing, is of excellent finish (Ra 3.2μm). The stem surface, contacting with the packing, should be rolled and pressed after being precisely machined, so as to reach to the high finish and compactness (Ra 0.8μm) and ensure the reliable tightness of the stem area.

KOSEN Cast steel Gate Valves are primarily used for stop valves fully opened or fully closed .They are not normally considered for throttling purposes,but more for slurries,viscous fluids,etc. Gate valves are characterized by a traveling wedge ,which is moved with the operation of the stem nut. Gate valves usually have a minimum pressure drop when fully open,provide tight shut-off when fully closed,and remain relatively free of contamination buildup.

Forged steel gate valve refers to the closing piece (gate) along the path of the central line of the vertical movement of the valve. The forged steel gate valve is mainly cut off in the pipeline. Forged steel gate valve is a widely used valve, and its general caliber DN or less 50 cutting device selects it. Forging steel gate valves are more common.