Verified by manufacturer 6 months ago
DN450: Fig. 971G
A fully-lugged, lever (Fig. 970) or gearbox (Fig. 970G) operated gas butterfly valve.
A fully-lugged, lever (Fig. 970) or gearbox (Fig. 970G) operated gas butterfly valve.
Features and benefits:
Color | Blue Guidance for specification option: Epoxy paint on body and lever. Yellow Guidance for specification option: Aluminium bronze disc. Silver Guidance for specification option: Stainless steel shaft and taper pin. Black Guidance for specification option: Buna-N O-ring. |
Material | Stainless steel Guidance for specification option: Shaft and taper pin. Steel Ductile iron Guidance for specification option: Body with epoxy paint. Aluminium Guidance for specification option: Alloy for lever, epoxy painted and aluminium bronze for disc. Rubber Guidance for specification option:
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Uniclass |
Standard | To BS EN 593 and BS EN 558. |
DN rating | DN450.Manufacturer guidanceNominal. |
PN rating | Temperature: -10 to +90°C: PN16.Manufacturer guidanceEach valve is individually hydrostatically tested to BS EN 12266-1 at the following test pressures: Shell (24 bar) and Seat (17.6 bar). |
Working conditions | |
Type of fluid | Gaseous. |
Maximum working pressure | 10 to 16 bar. |
Materials | |
Body | Ductile iron (epoxy paint).Guidance for specification option: To ASTM A536 64-45-12. |
Shaft | Stainless steel grade 410.Guidance for specification option: To ASTM A276 410 and stainless steel taper pin. |
Disc | Aluminium bronze.Guidance for specification option: To C954 ASTM B148. |
Seat | Guidance for specification option:
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Operation | |
Manual | Gear.Guidance for specification option: Fig. 971G: Cast iron gearbox. |
Dimensions | 422 x 317.5 x 105 x - x 325 x 450 x 441 x 185 x 160 x 120 mm. Manufacturer guidance
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Weight | 277.0 kg (Gearbox). |
Flow capacity | 10419 Kv. |
Thread size | 16 x M27. Manufacturer guidanceNumber x thread size. |