Wafer type double eccentric high-performance soft sealing butterfly valve
model: D72F-25C , D372F-25C , D672F-25C , D972F-25C
Introduction to double eccentric butterfly valve:
The wafer type double eccentric high-performance soft sealing butterfly valve is further improved on the basis of the single eccentric butterfly valve. The rotating axis of the butterfly plate is offset by one size from the sealing section of the butterfly plate, and one size from the central axis of the valve body channel, which forms a double eccentric sealing structure. Its structural feature is that the valve stem axis is not only offset from the center of the butterfly plate, but also from the center of the body. The effect of the double eccentric butterfly valve enables the butterfly plate to quickly disengage from the valve seat after the valve is opened, greatly eliminating unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat, reducing the opening resistance distance, reducing wear, and improving the service life of the valve seat. At the same time, the double eccentric butterfly valve can also use metal seat, which improves the application of butterfly valve in high-temperature field. The double eccentric metal sealing valve can achieve good energy-saving effect, especially when it is used in the air gas pipeline of the furnace together with the gas sub high speed burner, curtain burner and other burners.
Wafer type double eccentric high-performance soft sealing butterfly valve - Shanghai Yonglong Valve Factory
Technical parameters of high-performance butterfly valve:
Valve body material: WCB, 304, 316, 316L
Valve plate material: WCB, 304316316L
Valve seat material: PTFE, hard alloy
Connection mode: wafer type, flange type
Flange standards: GB, ANSI, JIS, DIN
Pressure rating: PN10 PN16、PN25、PN40、150LB、300LB
Drive mode: handle, turbine, electric, pneumatic
Structure features of double eccentric soft seal butterfly valve:
1. Reasonable design, compact structure, easy assembly and disassembly, and easy maintenance.
2. The eccentric structure is adopted to reduce the friction of the sealing ring and extend the service life of the valve.
3. Soft sealing valve seat can achieve zero leakage.
4. Replace the valve plate seal ring, butterfly plate, rotating shaft and other materials, which can be applied to a variety of media and different temperatures
Composition structure and application principle of double eccentric wafer butterfly valve:
Wafer type high-performance soft seal double eccentric butterfly valve consists of valve body, butterfly plate, valve seat, seal ring, seal retainer, gasket, valve shaft, tapered screw, bearing, thrust bearing, seal packing box, connection seat and bolt fasteners. The valve shaft of the double eccentric butterfly valve has two offset positions with the vertical center line. During the closing process of the valve plate, the entire seal ring has a gap with the valve seat, until the closing position, the gap between the seal ring and the valve seat disappears to produce a sealing effect.
Double eccentric wafer type soft seal high-performance butterfly valve - Shanghai Yonglong Valve Factory
Wafer type soft seal double eccentric high-performance butterfly valve is formed by gradual improvement of ordinary butterfly valve to adapt to different working conditions (working temperature, working pressure). A dimension A offset is formed at the valve plate rotation center (i.e. the valve shaft center) on the valve plate sealing section, and a dimension B offset is formed with the valve body center. The structure of the metal valve seat is a cone, and the structure of the PTFE seal ring is a spherical surface centered on the valve stem. The opening and closing action of the valve is realized by the structural principle that the conical surface is tangent to the spherical surface.
Recommendations for similar products: Double eccentric electric high-performance butterfly valve ， Wafer type pneumatic high-performance butterfly valve ， Double eccentric pneumatic high-performance butterfly valve
