AIR VALVE, LARGE ORIFICE, PN16
Large orifice air valve for drinking water (not wastewater) and neutral liquids max. 70° C
AVK series 851 automatic air venting valves are designed for automatic discharge of accumulated air during normal working conditions.
Corrosion protection is ensured by coating all ductile iron components with WRAS approved fusion bonded epoxy and having all other components made by a drinking water approved stainless steel. The seals are made of drinking water approved EPDM rubber featuring an excellent compression set and ability to regain its original shape
| Variant 851/20-005 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN25 |
| PN: | PN 16 |
Features
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1" female BSP thread for connection to pipe system
-
Anti-friction coated stainless steel fasteners
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Ductile iron parts coated with GSK approved fusion bonded epoxy
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Internal components are EPDM or ABS, WRAS approved
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The complete product is approved for drinking water by WRAS
Downloads
Datasheet
Certificate(s)
Reference nos. and dimensions:
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| Reference no. | DN mm |
A mm |
B mm |
Theoretical weight/kg |
|---|---|---|---|---|
| 851-025-20-822000 | 25 | 145 | 102 | 2.4 |
Enquiry
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Components
| 1. | Body | Ductile iron EN-GJS-500-7 |
| 2. | Float guide top | ABS |
| 3. | Float, large orifice | ABS |
| 4. | Float guide bottom | ABS |
| 5. | Guide ring | ABS |
| 6. | Seal ring | EPDM rubber |
| 7. | Seat ring | ABS |
| 8. | Bonnet | Ductile iron EN-GJS-500-7 |
| 9. | Cowl | Ductile iron EN-GJS-500-7 |
| 10. | Washer | Stainless steel A4 |
| 11. | Nut | Stainless steel A4, Delta Seal |
| 12. | Bolt | Stainless steel A4 |
Test/Approvals
- Hydraulic test according to EN 1074-1 / EN 12266
- Approved according to WRAS certificate 241102017, max. 50°C
Standards
- EN 1074-4
