The rotation center of the three-offset butterfly valve plate (i.e., the center of the valve shaft) forms an A offset on the valve plate sealing section, and forms a B offset with the center of the valve body; the center line of the valve body sealing surface and the center line of the valve seat (i.e., the valve The body centerline) forms an angular offset with an angle β. In order to overcome the contradiction of the double eccentric butterfly valve, the butterfly valve was eccentric for the third time. Its structural feature is that while the double-eccentric valve stem axis position is eccentric, the conical axis of the butterfly plate sealing surface is deflected from the body cylinder axis. That is to say, after the third eccentricity, the sealing section of the butterfly plate does not change. It is not a true circle, but an ellipse, and the shape of its sealing surface is therefore asymmetrical. One side is inclined to the center line of the body, and the other side is parallel to the center line of the body.
- Lockable Lever
- Site maintanence
- Ease of automation
- Positive tight shut-off
- Optional top flanges to ISO 5211
- Qualified for both gaseous and liquid services
- Broad line of body and trim materials for a variety of medium service.
- ISO 5752, BS 5155, API 609, MSS-SP-68, ASME B16.10, ASME B16.5, DIN 3202
- Materials: Cast Carbon Steel, Low Temp. Carbon Steel, Satinless Steel, Alloy Steel, duplex steel and ect.
- Temperture: -196 Deg. C to 550 Deg.C
- Pressure Ratings: ANSI 150#~600, PN10~PN100
- Size Ranges: 2" to 40"- 50mm to 1000mm (Larger sizes upon request)
- Ends Connections: Wafer, Lugged, Double Flanged, Butt Weld or Grooved
- Actuations: Manual, Pneumatic, Electric, Hydraulic (Counterweight) & Electro-hydraulic
Offset Butterfly Valve
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