Products Description
The double eccentric butterfly valve is further improved on the basis of the single eccentric butterfly valve. Its structural feature is that the axis of the valve stem is deviated from the center of the butterfly plate and the center of the body.
The effect of the double eccentric butterfly valve enables the butterfly plate to quickly separate from the valve seat after the valve is opened, greatly eliminating unnecessary excessive extrusion and scratching between the butterfly plate and the valve seat, reducing the opening resistance, reducing wear, Improved valve seat life. The scratching is greatly reduced, and the double eccentric butterfly valve can also use a metal valve seat, which improves the application of butterfly valves in high temperature fields.
Butterfly Valve Doubles Offset Design Specification
|
Size Range |
2"-80" DN50-DN2000 |
|
Body Material |
WCB, CF8, CF8M, CF3, CF3M etc. |
|
Pressure Rating |
Class 150 PN6-PN25 |
|
DISC Material |
WCB, CF8, CF8M, CF3, CF3M etc. |
|
End Connection |
Flange (RF, RJ), Butt Welding, wafer, Lug |
|
Seat Material |
PTFE, EPDM, RPTFE |
|
Structure Style |
Full Port, Double Offset |
|
Stem Material |
17-4PH, SS410, SS304, SS316 |
|
Actuator Options |
Lever, Worm Gear, Pneumatic, Electric. |
|
Design Standard |
API 609, MSS SP-67, MSS SP-68, DIN3354, EN558, JIS B2071 |
|
Temperature Range |
-50℃~650℃ |
|
Face to Face Standard |
ANSI B16.10, MSS SP-68, EN558-1, JIS B2002 |
|
Connection Standard |
Flange Drilling: API609, ASME B16.5, ASME B16.47, EN1092, JIS B2220, GOST 12815 Butt Weld: ASME B16.25, GB/T 12224 |
|
Test Standard |
API598, EN12266.1, JIS B2003 |
Double Offset Valve Features
● Light weight, universal design, 80% to 90% lighter than traditional full body check valve.
● Reduce pipeline supports, simplify pipelines, make installation easier and lower cost.
● Reduce thermal and seismic considerations.
● No additional expensive support required.
● Low valve operating torque.
● The flow curve tends to a straight line.
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