BL40
BL40: DUCTILE IRON BODY / DUCTILE IRON DISC, NBR SEAL
Description
BL 40 butterfly shut-off valve with centred disc, featuring a Lug-type body and ductile iron disc, with an EPDM elastomer seal; pitch in accordance with standard EN 558, for EN 1092 PN 16 flanges, manufactured in accordance with the relevant product standards and the EN ISO 9001 quality management system. Corrosion-resistant coating using FBE (Fusion Bonded Epoxy) powder, colour blue RAL 5017, minimum thickness 250 μm.
BL 40 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
The BL40 shut-off valve is suitable for heating systems and hot water systems up to 110°C; air-conditioning systems (HVAC); water treatment and distribution systems; wastewater systems; and industrial, agricultural and fire-fighting applications. 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 are 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 operation; the integrated mounting bracket in accordance with ISO 5211 allows for easy fitting of a wide range of actuators.
BL40 SPECIFICATIONS
Operating pressure: PN 16
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 40
( 2 ) Disc: Ductile cast iron GGG 40
( 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
