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RPM Diffusion — Professional Marine Valves

Butterfly valve

A butterfly valve opens or shuts the line with a disc that rotates a quarter turn. Lighter than other valve types, it is used on large diameters; the ECON 5820 data sheet mentions engine rooms, ballast systems and shipside valves.

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Three mounting types are available:

  • wafer, clamped between two flanges;
  • lug (tapped lugs), bolted to each flange; the ECON 5820 data sheet states that it can be used as an end-of-line valve;
  • flanged (double-flanged or single-flanged).

On the ECON valves in the range, the body is EN-JS1030 ductile iron and the disc CC333G aluminium bronze, a material the data sheet describes as suited to seawater. The liner provides the seal and sets the temperature range: from -10 to +80 °C in NBR, up to +120 °C in EPDM according to the 5820 data sheet. Operation by lever, by handwheel gearbox, or bare shaft with an ISO 5211 top flange for an actuator.

Sizes range from DN25 to DN1000, from PN6 to PN16, with some models also suitable for ANSI 150. Depending on the model, the data sheets state Lloyd's type approval, 3.1 and 3.2 certificates and Bureau Veritas.

Brands: RPM, Eriks and Medana & Visca.

37 products

Lug butterfly valve

See the 16 products “Lug butterfly valve”

Wafer butterfly valve

See the 16 products “Wafer butterfly valve”

Flanged butterfly valve