Lug Type Concentric Butterfly Valve
The turning center of the butterfly plate is on the center line of the valve body and the sealing face section of the butterfly plate. In closing, the ex-circle sealing face of the butterfly plate will extrude the valve seat made of synthetic rubber, generating elastic deformation on the seat to form an elastic force used as a sealing specific pressure so as to guarantee the tightness of the butterfly valve.
Main Parameter Specification
Design and Manufacture:API 609, MSS SP-67, GB/T 12238
Face to Face Dimension:API609,GB/T 12224
Flange Connection Dimension:ASME B16.1,ASME B15.5,ASME B16.47,BS4504,GB/T 9113,JB/T 79
Test and Inspection:API 598,JB/T 9092,GB/T 13927
Pressure Temperature Rating:API 609,GB/T 12224
Body: Ductile iron/SS316/304/WCB etc
Disc: Ductile iron/SS316/305/Aluminum-bronze/Ductile iron, nickle plated etc
Stem: SS416/420 etc
Seat: EPDM, NBR, VITON
Painting: Expoxy paint
Methods of operation: Gear wheel/Electric actuator
Medium: Water/Sea water/Wash water/Oil
Temperature Range: -45-+135
Main Parts Materials
Main characteristics of the products
1.butterfly valve is single and compact in structure and light in weight, and easy for assembly and disassembly.
2. The operating torque of it is small, then tuing 90(it can open or clese with light and fast action)
3. It is small in flowing resistance and good in energy-savinng effect, with discharge characteristic approximating inxlined straight line.
4. It is featured by reliable sealing, zero leakage with ten thousands of opening and closing time
5. The valve can be made of various materials, adapted to all kinds of media.
6. It is used in the piplinge and vessels for conbwying various corrosive and mon-corrosice flui media in the engineering systems of water supply, generating, petroleum, gas, environmental protection and also for regulating and cutting off the off the floeing of media.
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