Wafer Concentric Butterfly Valve, API 609, GGG40, 4 IN, CL150

The Wafer Concentric Butterfly Valve features a ductile iron GGG40 body and is designed per API 609 standards. With a 4-inch (DN100) size, Class 150 LB (PN20) pressure rating, and worm gear operation, this valve provides reliable flow regulation and tight shutoff. Its wafer design ensures easy installation in tight spaces.

Product Name: Wafer Concentric Butterfly Valve
Design Standard: API 609
Body Material: GGG40
Size: 4 Inch, DN100
Pressure: Class 150 LB, PN20
End Connection: Wafer
Operation: Worm Gear

The Wafer Concentric Butterfly Valve is designed to maintain a reliable seal against bi-directional pressure differentials, preventing backflow in systems intended for unidirectional flow. The valve achieves this with a precisely fitted seal, gasket, and O-ring, all precision-machined to ensure a tight seal. Both the upstream and downstream sides of the valve feature a flat valve face for improved sealing. The valve body is equipped with threaded inserts on both sides, allowing for installation using two sets of bolts and no nuts. This installation method permits the disconnection of either side of the piping system without disturbing the other, providing flexibility and ease of maintenance.

Technical Specifications

Nominal Size Range: 2-48 Inch (DN50-DN1200)
Pressure Rating: Class 150 LB, PN10, PN16
Materials: Ductile Iron GG25, GGG40, ASTM A216 WCB, A351 CF8, CF8M, CF3, CF3M
Optional Seatings: Resilient NBR, EPDM, VITON
Operation: Handle, Handwheel, Pneumatic, Electric
End Connections: Wafer, Lug, RF Flange
Design and Manufacture Standards: 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 Standards: API 598, GB/T 13927
Temperature Range: -29°C to 120°C
Mediums: Water, Gas, Oil, etc.

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: