Forged Pressure Seal Gate Valve

The Cast Steel Slab gate valves is a sliding valve with closing parts as parallel gates. The shutter can be single gate or double gate with extension mechanism. The pressing force of the gate to the valve seat is controlled by the medium pressure of the floating gate or floating seat. If it is a double gate flat gate valve, the expansion mechanism between the two gates can supplement this compaction force.The flat gate valves can be divided into manual flat gate valves, pneumatic flat gate valves and electric flat gate valves according to the driving mode. It can be divided into flat gate valve with diversion hole, flat gate valve without diversion hole, flat gate valve of oil field, flat gate valve of pipeline and gas plate valve.

The opening and closing part of the thread gate valve is a plug valve, the sealing surface is flat or conical, and the valve flap moves straight along the centerline of the fluid. The motion form of the stem has the lifting rod type (the stem lift, the handwheel not lifting), also the lifting and rotating rod type (the handwheel and the stem rotates with the lift, the nut is located on the body).

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.

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.