Concentric Butterfly Valve

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Flowlink Valves & Controls offers high-quality concentric butterfly valves, designed for reliable performance across a range of industries. Our valves feature a simple yet robust design with a centered disc and shaft, providing a tight seal and smooth operation. Ideal for low to medium pressure systems, our concentric butterfly valves deliver reliable performance and long service life. Flowlink indents a comprehensive range of butterfly valves, and we are committed to providing valve solutions that meet the specific needs of our customers, ensuring efficiency and safety in every application. Our valves are available in various temperature ratings, typically ranging from -20°C to 150°C, depending on the specific seat material. Common seat materials include EPDM, NBR, and PTFE, which offer excellent chemical resistance and sealing properties, ensuring optimal performance in a wide range of applications.

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Technical Specification

Size Range 2” ~240” (DN50~DN6000)
Class Range 150Lb~2500Lb (PN10~PN420)
Design Standard API 609, ASME B16.34, API607, BS EN-593
End Connection RF/ RTJ – ASME B16.5 / B16.47; BW – ASME B16.25; Wafer
F – F Dimension ASME B16.10
Construction Concentric/Double/Triple Offset, Wafer/Lug/Double Flange, Soft/Metal Seat, Sleeved/Lined, Unidirectional/ Bidirectional Seal
Design Features Emergency Sealant Injection; Vent & Drain; Antistatic; Blowout Proof Stem; Fire Safe (As Per API 607)
Seat Seal Options EPDM, NBR, PTFE, Metal Seats, Viton
Temperature Limits -40°C to 200°C (EPDM), -30°C to 120°C (NBR), -40°C to 260°C (PTFE), -29°C to 538°C (Metal Seats)
Special NACE; Cryogenic; Extended Stem; Fugitive Emission
Inspections & Tests

API 598

BS EN 12266-1

Material Forged & Cast CS, LTCS, SS, AS and Special Steel, Cast Iron
Applications Oil & Gas, Chemicals, Waters, Power, Marine, Mining, etc.

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