AVK DOUBLE ORIFICE CLUSTER ARRANGEMENT AIR VALVE, PN16
ABS float, guide and seat, A4 bolts, 300µm coating
Contact
Pham Trung
Technical Manager
Double orifice cluster arrangement air 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 851/20-006 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN150 - DN250 |
| PN: | PN 16 |
Features
- A clever float design prevents air rushing out of the system from prematurely closing the valve
- Large air flow capacity
-
Ductile iron parts coated with GSK approved fusion bonded epoxy
-
Internal components are EPDM or ABS, WRAS approved
- No moving parts are touching the internal coating
- The complete product is approved for drinking water
Downloads
Reference nos. and dimensions:
| AVK ref. no. | DN mm |
Flange drilling |
A mm |
B mm |
C mm |
D1 mm |
H3 mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|
| 851-150-20-122004 | 150 | PN16 | 642 | 510 | - | 100 | 663 | 145 |
| 851-200-20-122004 | 200 | PN16 | 921 | 867 | 759 | 100 | 663 | 223 |
| 851-250-20-122004 | 250 | PN16 | 921 | 867 | 867 | 100 | 663 | 292 |
Components
| 1. | Body | Ductile iron GJS-500-7 (GGG-50) |
| 2. | Float guide bottom | ABS plastic |
| 3. | Float guide top | ABS plastic |
| 4. | Plug | Stainless steel AISI 316 |
| 5. | Orifice float, large | ABS plastic |
| 6. | Guide ring | ABS plastic |
| 7. | Seal ring | EPDM rubber |
| 8. | Seat ring | ABS plastic |
| 9. | Bonnet | Ductile iron GJS-500-7 (GGG-50) |
| 10. | Washer | Stainless steel A4 |
| 11. | Nut | Stainless steel A4, Delta Seal |
| 12. | Bolt | Stainless steel A4 |
| 13. | Cowl | Ductile iron GJS-500-7 (GGG-50) |
| 14. | O-ring | EPDM rubber |
| 15. | Orifice cover | Polyamide |
| 16. | Orifice bracket | Polyamide |
| 17. | Gasket | EPDM rubber |
| 18. | Grooved pin | Stainless steel A4 |
| 19. | Orifice float, small | ABS plastic |
| 20. | Side chamber | Ductile iron GJS-500-7 (GGG-50) |
| 21. | Body | Ductile iron GJS-500-7 (GGG-50) |
| 22. | Bolt, hexagon head | Stainless steel A4 |
| 23. | Gasket | EPDM rubber |
| 24. | Washer | Stainless steel A4 |
| 25. | Nut | Stainless steel A4, Delta Seal |
| 26. | Bolt | Stainless steel A4 |
Test/Approvals
- Hydraulic test according to EN 1074-1 / EN 12266
- WRAS approved to max. 50°C
Standards
- EN 1074-4
- Flange drilling to EN1092, PN16