Cast Steel Gate Valve

KOSEN Valve company is a industry valves manufacturer, including DIN F5、DIN F7、DIN F4 Rising Stem Gate Valve, DIN F15 Non-Rising Stem Gate Valve, DIN F1、DIN F2 Globe Valve, DIN F32 Angle Globe Valve, DIN F1、DIN F6 Swing Check Valve, DIN F1 Lift Check Valve, DIN Cast Iron Valve etc, Our products are utilized widely in oil, gas, hydraulic, refining chemicals, petrochemicals, pharmaceuticals, food industries, fire-safe systems, marine systems and power stations, etc.

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 Pressure Seal Gate Valves is a valve realizing the closing and opening function by lifting the disc up&down as the closure member. The main advantages of API Stainless Steel Gate valve are smooth flowing passage, small flowing resistance and small operation torque, while the main disadvantages of this valve are: easy-damaged sealing face, long closing&opening time, large volume&weight. Gate valve is widely used on pipeline as it's suitable to be manufactured with big size. Gate valve is and generally for cutting off purpose but not intended to be used as a regulating valve because the sealing face would be corroded by the medium easily when valve is not in fully open or closed position.

The stem nut of the hidden gate valve is directly contacted with the medium in the valve body. When the gate is opened and closed, it is realized with the rotating stem. The advantage of this structure is that the height of the gate valve keeps constant, so the installation space is small, and it is suitable for large caliber or gate valves with limited installation space. Such a structure should be equipped with an opening and closing indicator to indicate the degree of opening and closing.