AVK DOUBLE ORIFICE AIR RELIEF VALVE, KSD PN10
ABS float, guides and seat, A2 bolts/A4 delta seal GZ nuts
Contact
Enquiries (Office)
AVK Singapore Pte. Limited, 40 Gambas Crescent Nordcom 2 757018 Singapore Singapore
Air relief valve for drinking water (not wastewater) and neutral liquids max. 70° C
AVK series 851 double orifice, triple action air valves are designed to allow air to rapidly either escape or enter the pipe system when filling or draining, as well as for automatic discharge of accumulated air during normal working conditions. The unique ‘Aerokinetic’ design allows air to rush out of the system at great speed without forcing the float upwards and closing it prematurely. This makes sure that the valve closes only after all air has left the system and water has entered the chamber.
All iron components are protected with fusion bonded epoxy coating in a GSK-approved process to ensure high durability. All other components are made of either WRAS approved polymer material or stainless steel to reduce corrosion risk even further. All seals are made of WRAS approved EPDM rubber featuring an excellent compression set and ability to regain its original shape.
| Variant 851/41-008 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN50 - DN200 |
| PN: | PN 16 |
Features
- A clever float design prevents air rushing out of the system from prematurely closing the valve
- Large air flow capacity
- All iron parts with contact to the water are coated with drinking water approved, fusion bonded epoxy
- The resilient seals are made of EPDM rubber and the seat is ABS, all drinking water approved
- All other internal parts are highly corrosion resistant AISI 316 stainless steel or ABS
- No moving parts are touching the internal coating
- The complete product is approved for drinking water
Downloads
Reference nos. and dimensions:
| Reference no. | Flange DN mm |
Flange drilling |
D mm |
H3 mm |
W mm |
W1 mm |
W6 mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|
| 851-050-41-A11000 | DN50 | KS D 4308 | 50 | 277 | 165 | 83 | 220 | 16 |
| 851-080-41-A11000 | DN80 | KS D 4308 | 80 | 277 | 165 | 83 | 220 | 17 |
| 851-100-41-A11000 | DN100 | KS D 4308 | 100 | 283 | 205 | 103 | 249 | 23 |
| 851-150-41-A11000 | DN150 | KS D 4308 | 150 | 345 | 255 | 128 | 287 | 36 |
| 851-200-41-A11000 | DN200 | KS D 4308 | 150 | 345 | 255 | 128 | 286 | 40 |
Components
| 1. | Float guide top | ABS plastic |
| 2. | Float, large orifice | ABS plastic |
| 3. | Float guide bottom | ABS plastic |
| 4. | Seal ring | EPDM rubber |
| 5. | Guide ring | ABS plastic |
| 6. | Seat ring | ABS plastic |
| 7. | Bolt | Stainless steel A2 |
| 8. | Bonnet | Ductile iron GJS-500-7 (GGG-50) |
| 9. | Washer | Stainless steel A2 |
| 10. | Cowl | Ductile iron GJS-500-7 (GGG-50) |
| 11. | Plug | Plastic |
| 12. | Orifice cover | Polyamide |
| 13. | Bonnet | Ductile iron GJS-500-7 (GGG-50) |
| 14. | Gasket | EPDM rubber |
| 15. | O-ring | EPDM rubber |
| 16. | Orifice bracket | Polyamide |
| 17. | Split pin | Stainless steel A4 |
| 18. | Seal | EPDM rubber |
| 19. | Screw | Stainless steel A4 |
| 20. | Float, small orifice | ABS plastic |
| 21. | Body | Ductile iron GJS-500-7 (GGG-50) |
| 22. | Bolt | Stainless steel A2 |
| 23. | Washer | Stainless steel A2 |
| 24. | Nut | Stainless steel A4, Delta Seal |
| 25. | Bolt | Stainless steel A2 |
| 26. | Nut | Stainless steel A4, Delta Seal |
Test/Approvals
- Hydraulic test according to EN 1074-1 / EN 12266
- Approved according to WRAS certificate 241102017, max. 50°C
Standards
- EN 1074-4
- Flange drilling to KS D 4308 PN10
