BL50
BL50: LUG-TYPE BUTTERFLY VALVE PN 25
Description
Centre-mounted butterfly shut-off valve with a Lug-type body and spheroidal graphite cast iron disc, EPDM elastomer seal, pitch in accordance with standard EN 558, for EN 1092 PN 25 flanges, 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.
Lug butterfly valves are secured to the flanges using through-bolts, which allow them to be fitted at the end of a pipeline even without the use of a counter-flange.
Application
Heating systems, hot water up to 110°C. Air conditioning systems (HVAC). Water treatment and distribution systems, waste water, industrial and agricultural applications, fire-fighting systems. Not suitable for liquids containing mineral oils, hydrocarbons, steam or liquids that have a corrosive effect on the EPDM seal coating. 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, even without the use of a counter-flange, and for service requiring frequent actuation; the integrated mounting bracket in accordance with ISO 5211 allows for easy fitting of a wide range of actuators.
BL50 SPECIFICATIONS
Operating pressure: PN 25
Operating temperature: -20°C / +110°C
Design standard: EN593
Gauge: EN558-1
Flanges: EN 1092-1
Ends: METRIC – ISO1502
Upper flange: ISO5211
Testing: EN12266-1
Coating: Epoxy powder RAL 5017, thickness 250–300 μm
BL50 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
