BW50
BW50: PN 25 WAFER BUTTERFLY VALVE
Description
BW50 wafer-type butterfly shut-off valve with centred disc, featuring a wafer-type body and spheroidal graphite cast iron disc, EPDM elastomer seal, operating pressure PN 25, bore dimensions in accordance with standard EN 558, manufactured in accordance with the relevant product standards and the EN ISO 9001 quality management system. Anti-corrosion coating using FBE (Fusion Bonded Epoxy) powder, colour blue RAL 5017, minimum thickness 250 μm.
Wafer-type butterfly valves are suitable for in-line installation between two flanges (or at the end of a line with a counter-flange); centring is achieved by means of slots machined into the valve body.
Application
The BW50 wafer-type butterfly valve is suitable for use in heating systems and hot water systems up to 110°C. Air conditioning systems (HVAC). Water treatment and distribution systems, wastewater systems, industrial and agricultural applications, and fire-fighting systems. They are not suitable for liquids containing mineral oils, hydrocarbons, steam or liquids that have a corrosive effect on the EPDM seal. Other liquids and larger diameters available on request.
They are suitable for flow throttling and regulation.
(Provided the correct product is selected for the application) They are suitable: for in-line and end-of-line applications, and for service requiring frequent operation; the integrated mounting flange in accordance with ISO 5211 allows for easy fitting of a wide range of actuators.
BW50 SPECIFICATIONS
Operating pressure: PN 25
Operating temperature: -20°C / +110°C
Design standard: EN 593
Gauge: EN 558-1
Flanges: EN 1092-1
Upper flange: ISO 5211
Tests: EN 12266-1
Coating: Epoxy powder RAL 5017, thickness 250–300 μm
BW50 MATERIALS
( 1 ) Body: Ductile cast iron GGG 50
( 2 ) Disc: Ductile cast iron GGG 50
( 3 ) Seal: EPDM
( 4 ) Shaft: AISI 431 stainless steel
( 5 ) Pin: AISI 431 stainless steel
( 6 ) Bushing: Glass fibre + PTFE
( 7 ) O-ring: NBR
( 8 ) Lever: GG 25 lamellar cast iron
