... This kind of valve has two structures including casting and plate welding, 150-pound normally classified into flat structure, while more than 300 pound classified into casting and plate welding round structure.In order to reduce weight, valve shell normally used elliptical shape.To reduce the resistance coefficient and to be easily cleaned for the pipe, valve shell normally used straight pipe.Plate welding structure is normally used forless than 150-pound valve.
....Use Single floating-gate structure.Considering the standard requirements, turn the hand-wheel in clockwise to close the valve.It is called Flat Gate Valve with Diversion Hole when with diversion hole, otherwise called Flat Gate Valve without D/H.When opening and closing, the valve plate always contacts with valve seat, which make sealing surface protected from rushing by flows. ( limited to the Flat Gate Valve with Diversion Hole. ). The surface of gate valve is made special treatment, with anti-corrosion friction coefficient functions. TEE gasket is sealed on the sealing surface of floating valve seat, pressure to 20Mpa, which form a double seal structure with the damper closed.Due to the function of ¡°O¡±-ring, it can realize the double sealing completely for the input and output of valve, separating the body cavity from the channel, which can be repaired the valve during working situation, to remove any residues from body cavity.
.... ¡°T¡± type connection between Valve bar and gate plate
.... Use Asbestos gasket for flange of flat valve; for round valve, use O ring for flange; the bolts & nuts of flanges are all wire structure.
.... Valves have direction rod.
.... Valve rod and valve seat have been made special surface treatment
.... Valve-driving methods includes hand-wheel driven, gear driven, electrical-driven, pneumatic-driven, hydraulic-driven and so on
.... On/off: turn in clockwise / turn in counterclockwise
.... Length of valve structure can be referred to JB standard, GB standard or AP16D.
.... Size of Flange can be referred to JB standard, GB standard, or ANSIB16.5 £¨ ¡Ü24 £©, Welding flange can refer to requirements of ANSIB16.25.
.... Inspection can be in accordance with JB standard, GB standard, or AP16D.It depends on clients¡¯ requirements or needs. |
¡ñ This valve is used in pipeline transferring oil, nature gas, chemical industrial, environment protection industries, as hoisting equipment.
¡ñ The valve seat includes soft and hard, double sealing, very reliable.
¡ñ The torque is small when closing this valve, only 1/3 ¡« 1/4 of wedge-type valve.
¡ñ Material for main components: casting steel, stainless steel, alloyed steel
¡ñ Size of flange refers to JB79-59 |