Ductile Iron Wafer Type Butterfly Valve
Rubber lined butterfly valves are with simple structure and easy to produce, the center of stem, disc and valve body are in same position. The valve are lined by rubber such as Natural Rubber, or NBR, EPDM, which have been widely used in services containing corrosion medium like strong Acid or Alkali. The center lined butterfly valve are with high precise connection with excellent strength, suitable to operate by lever, gear, electric or pneumatic. The butterly valve is of compact structure and with superior sealing, and there is no leakage from the stem.This butterfly valve are with perfect sealing capability, less torque, easy to maintenace, besides, the seat and packing could be replaced. They are bi-directional seal and could be achieved zero-leakage for both. By the way, the sealing materials are with high capability of aging resistance and corrosion resistance, the service life are long.
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 material:Cast Iron,Ductile Iron
End Connection: Wafer,Lug,etc
Pressure range: Class150~600(PN16~PN100)
Working temperature: -10ºC~+120ºC
Operation : Handle, Gear, Electric actuator, etc
Main Parts Materials
|Flanged Centerline Di Disc Flange 4 Inch Butterfly Valve main material of parts|
|Body||Cast iron/Ductile Iron|
|Disc||Ductile Iron ,SS304,SS304L,SS316L|
|Hand wheel||Ductile Iron|
Main characteristics of the products
Small volume and light weight, easy to disassemble and maintain, and can be installed in any position.
Small pressure drops, Large flow capability.
The patent positioning technology.
Small operating torque, energy saving.
Linearity flow characteristics, the best control performance.
Simple and compact structure, 90° gyration to open quickly.
Long service life, good seal performance.
Previous: Lug Type Concentric Butterfly Valve