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Butterfly valves are among the most cost-effective solutions for isolating and regulating flow. This guide walks you through the key decisions so you can specify the right valve the first time.
Match the valve's nominal diameter (DN) to your pipeline's inner diameter. Reguvale manufactures butterfly valves from DN50 to DN2000. Smaller lines (DN50–DN300) commonly use wafer or lug types; larger diameters typically use flanged or double-offset designs for better sealing and lower torque.
Confirm your system's maximum working pressure. Our standard ratings are PN10 and PN16. For higher-pressure duty, specify reinforced bodies and appropriate seat compounds during inquiry.
The seat directly affects chemical compatibility and temperature range:
Wafer valves are sandwiched between flanges — the most economical. Lug valves have threaded inserts allowing dead-end service and easy removal. Flanged valves suit larger sizes and applications where frequent maintenance is expected.
Ductile iron is standard for water; stainless steel (SS304/316) is used for corrosive or hygienic service; cast steel handles higher temperatures and pressures.
Match the valve DN to your pipe inner diameter. Common ranges are DN50–DN2000; larger sizes often use flanged or double-offset designs.
Use EPDM for water and mild chemicals, NBR for oil-resistant needs, and Viton (FKM) for high temperature or aggressive media.
Wafer is most economical for sandwich installation between flanges; lug allows dead-end service; flanged is preferred for larger sizes and easier maintenance.