Concentric Butterfly Valve

The Concentric Butterfly Valves is generally used in a butterfly valve, the structure of rubber/PTFE seat has been designed as protecting body, and its usually apply to seawater industry. The Concentric Butterfly Valves in Wafer, flanged, lugged and Grooved ends connections, in a broad line of materials of carbon steel, duplex to special alloys, suitalbe for water, Vaste Water and Sewege service mediums.

A Concentric Butterfly Valves has a body, a resilient seat, a butterfly disk, a stem, packing, a notched positioning plate, and a handle or gear. The resilient seat is under compression when it is mounted in the valve body, thus making a seal around the periphery of the disk both upper and lower points where the stem passes through the seat. Packing is provided forming a positive seal around the stem for added protection in case the seal formed by the seat could become damaged.

» 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 Iron, Ductile Iron

» Pressure Ratings: ANSI 150#, PN10, PN16

» Size Ranges: 2" to 48"- 50mm to 1200mm (Larger sizes upon request)

» Ends Connections: Wafer, Lugged, Double Flanged, Butt Weld or Grooved

» Actuations: Manual, Pneumatic, Electric, Hydraulic (Counterweight) & Electro-hydraulic

Fangwen offers Concentric Butterfly Valve including, but not limited to

▲ Lug Concentric Butterfly Valve ▲ Wafer Concentric Butterfly Valve

▲ Flange Concentric Butterfly Valve

Lug Concentric Butterfly Valve

The Lug Concentric Butterfly Valves is widely used for water supply and drainage system to regulate or cut-off medium, in chemical industry, food and other industries. And it is designed to maintain a seal against bi-directional pressure differential to prevent backflow in systems designed for unidirectional flow. It accomplishes this with a tightly fitting seal, i.e., gasket, o-ring, precision machined, and a flat valve face on the upstream and downstream sides of the valve, valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and no nuts. The valve is installed between two flanges using a separate set of bolts for each flange. This setup permits either side of the piping system to be disconnected without disturbing the other side.

Fangwen Lug Concentric Butterfly Valves are with main Features as below:

» ISO 5752, BS 5155, API 609, MSS-SP-68, ASME B16.10, ASME B16.5, DIN 3202

» Materials: Cast Iron and Ductile Iron

» Pressure Ratings: ANSI 150#, PN10, PN16

» Size Ranges: 2" to 48"- 50mm to 1200mm (Larger sizes upon request)

» Ends Connections: Lug

» ptional Seatings: Resilient NBR, EPDM, VITON

» ctuations: Manual, Pneumatic, Electric, Hydraulic (Counterweight) & Electro-hydraulic