Overview of hard seal butterfly valves:
The hard sealing butterfly valve is an eccentric metal sealing structure, the sealing form is metal-to-metal sealing, the metal sealing ring can be replaced by a metal sealing, the stainless steel plate and the graphite composite plate sealing ring are metal sealed. The driving form of the hard sealing butterfly valve is in addition to the electric motor. : Manual, worm gear drive, pneumatic and so on. This type of valve should generally be installed horizontally in the pipeline.
The disc of the hard seal butterfly valve is mounted in the diameter direction of the pipe. In the cylindrical passage of the butterfly valve body, the disc-shaped disc rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation is 90°, the valve is fully open.
Hard seal butterfly valve features:
At present, the hard seal butterfly valve has been widely used in many fields such as petroleum, chemical, metallurgy, and hydropower as a component for implementing the on-off and flow control of the pipeline system. In the well-known butterfly valve technology, the sealing form is mostly sealed, and the sealing material is rubber, polytetrafluoroethylene or the like. Due to structural limitations, it is not suitable for industries such as high temperature resistance, high pressure, corrosion resistance and wear resistance. A relatively advanced butterfly valve is a three-eccentric metal hard sealing butterfly valve. The valve body and the valve seat are connected members, and the sealing surface layer of the valve seat is welded with a temperature-resistant and corrosion-resistant alloy material. The multi-layer soft stack sealing ring is fixed on the valve plate. Compared with the traditional butterfly valve, the butterfly valve has high temperature resistance, light operation, no friction in opening and closing, and the seal is compensated with the increase of the torque of the transmission mechanism when closing, and the butterfly valve is improved. The sealing performance and the advantage of extending the service life.
Yayi Valve Co., Ltd. specializes in producing hard sealing butterfly valves, soft sealing butterfly valves, stainless steel high temperature butterfly valves, ventilation butterfly valves, wear-resistant dust butterfly valves, thermal insulation butterfly valves, welcome to inquire!
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