Design code
Design standard: API 609,EN 593,,GBT 12238,,GB/T 12221
Structure length: API 609,EN558,ISO 5752,GB/T 12221
Connection standard: ASME B16.5, ASME B16.47, GB/T 9113, HG/T 20592, HG/T 20592, HG/T 20592, HG/T 20592, HG/T 20592, HG/T 20592
Test and Inspection: API 598, GB/T 26480
Pressure-Temperature:-46~+150℃
Connection: Clamping type, lug type, flange type, butt-welding type
Double eccentric butterfly valve is further improved on the basis of single eccentric butterfly valve. Its structure is characterized by the axis of the valve stem deviating from both the center of the butterfly plate and the center of the body. It is suitable for applications requiring reliable sealing and good adjustment characteristics. It can be used for quick cutting off or regulating the flow.
1. Because the butterfly plate can quickly detach from the valve seat, the unnecessary excessive squeezing and scraping phenomenon with the valve seat is greatly reduced, which greatly prolongs the service life of the valve seat while reducing the opening resistance distance and wear and tear.
2. the sealing surface of the butterfly plate adopts spherical arc body, the sealing mechanism achieves a real dynamic sealing through the system pressure.
3. the seat adopts PTFE and other elastic materials, good sealing performance, can achieve zero leakage.
4. outside the seat is movable inserts, the tighter the flange clamp, the greater the pressure, the better the sealing performance. Replacement of the valve seat is convenient and simple, only need to remove the inserts to remove the valve seat, do not have to disassemble the valve plate and valve shaft.
5, can have two-way zero leakage performance.