ASTM A351 CF8 Butterfly Valve, API 609, 2 Inch, CL150, Wafer

Product Name: Wafer Concentric Butterfly Valve
Design Standard: API 609
Body Material: ASTM A351 CF8
Seal Material: PTFE
Size: 2 Inch, DN50
Pressure: Class 150 LB, PN20
End Connection: Wafer
Operation: Lever

The Wafer Concentric Butterfly Valve is designed to maintain a reliable seal against bi-directional pressure differentials, preventing backflow in systems that are intended for unidirectional flow. It achieves this with a precisely fitting seal, gasket, and o-ring, all precision-machined for accuracy, and features flat valve faces on both the upstream and downstream sides. The valve body includes threaded inserts on both sides, enabling installation using two sets of bolts without the need for nuts. This design allows the valve to be installed between two flanges with a separate bolt set for each flange, enabling either side of the piping system to be disconnected without disturbing the other.

Technical Specification

» Normal Size Range: 2-24 Inch (DN50-DN600)
» Normal Pressure Rating: Class 150 LB, PN10, PN16
» Material: GG25, GGG40, ASTM A216 WCB, A351 CF8, CF8M, CF3, CF3M
» Optional Seating: PTFE
» Operation: Handle, Handwheel, Pneumatic, Electric
» Temperature Range: -29°C to 120°C
» Ends Connections: Wafer, Lug, RF Flange
» Design and Manufacture: GB/T 12228, API 609
» Face to Face (End to End): GB/T 12221
» Flanged Connection: ANSI B16.5, GB/T 9113
» Test and Inspection: API 598, GB/T 13927

Concentric Lining Butterfly Valve

Concentric Lining butterfly valve adopts lining on all the parts that contact with medium inside of body, the stainless steel which is resistance of corrosion is used as stem and disc to ensure the corrosion resistance of different strong corrosive medium. The valve body and disc materials can be made of cast iron, carbon steel or stainless steel to ensure the bearing strength. Many kinds of soft sealing material such as NBR, EPDM or PTFE etc can be used as lining material to adapt to different corrosive medium or working temperature.

Structural Features

• The indicator plate has multiple opening angles ranging to 90 degrees, which is convenient to locate the gate.
• Top flange as per ISO 5211 to allow for the easy installation of gear box and actuators.
• O-rings provide positive stem sealing performance.
• Note: Alternative packing solutions available.
• Dual stem design reduces valve operating torque.
• Upper and lower bearings minimize operating torque.
• The semi-circular butterfly plate design reduces operating torque and promotes extended service life.The seal ring is supported to achieve disassembly and prevent leakage of the seal ring.
• The seal ring extends to the end of the body and is installed without additional gaskets.

ISO 5211 Top Mounting

Different End Connections Available:

Pressure/Temperature Ratings Chart: