Fig. 260W Double Non Return Valve
Verified by manufacturer 17 days ago
DN50
DN50
Cast iron double non-return valve.
Application
Suitable for use with wholesome (potable) water to 85°C.
Description
Cast iron double non-return valve.
Features and benefits:
- 2 WRAS Approved single non-return valves (to 85°C) bolted together.
- Spring loaded axially guided disc.
- Positive non-slam shut-off.
- Resilient seat.
- WRAS Approved fusion bonded epoxy internal and external coating.
- Valves are not intended to be used as backflow prevention devices, conforming to Schedule 2 Section 6 of the WRAS Water Regulations Guide.
General information
Shape | Circular |
Color | Blue Guidance for specification option: Body. Silver Guidance for specification option: Nut and stud. |
Material | Cast iron Guidance for specification option: Body, disc and guide. Stainless steel Guidance for specification option: Spring, stem and plug. Steel Guidance for specification option: Zinc plated stud and nut. Brass Guidance for specification option: Bushing. Rubber Guidance for specification option: EPDM seat and gasket. |
Uniclass | |
CAWS | U90/460 Non-return valves U90/460 Non-return valves |
Product range |
Specification data - Gas fire-suppression check valves
Third party certification | WRAS Approved.Guidance for specification option: Title: 'Acceptability of two single check valves in place of a double check valve' Clause Reference: 'Schedule 2 paragraph 15(5) of the WRAS Water Regulations Guide' 'Two suitably approved single check valves (Type EA device) installed in series are accepted as offering the equivalent level of protection as that afforded by a double check valve (Type EC device) providing the maximum distance between the adjacent flanges of the valves did not exceed twice their nominal bore and the operation of one component does not interfere with the operation of the other.' |
Valve type | Non-return valve. |
Material | Body, disc, and guide: Cast iron, spring, stem and plug: Stainless steel grade 304 – 1.4301, Bushing: Brass CW611N, Seat and gasket: EPDM, Stud and nut: Steel (zinc plated).Guidance for specification option:
Manufacturer guidance
|
Working pressure | 16 bar. |
Connections | Flanged to BS EN 1092-2, PN16. |
PressureRange | Temperature: -10 to +120°C: PN16. Manufacturer guidanceWRAS Approved to 85°C. |
Dimensions | 203 x 165 mm. Manufacturer guidanceNominal A x B. |
Weight | 17 kg. |
Inlets/outlets diameter | DN50. |
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