AVK DOUBLE ORIFICE AIR VALVE WITH IN-FLOW CHECK VALVE
BS/AS flange, ABS float/ABS guide/ABS seat, EPDM seal, GZ coated A4 fasteners, AS coating
Air relief valve, ABS internal parts, EPDM seals, PN 25, for water and neutral liquids to 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 851/10-004 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN50 - DN150 |
| PN: | PN 25 |
Features
-
Cylindrical large Orifice float
-
Embodies unique aerokinetic feature
-
Does not shut prematurely
-
Release of large volumes of air during pipeline filling
-
Allows inflow of large volumes of air when pipe is emptied
-
Release of air under pressure
-
Low maintenance
- Streamlined air flow
Downloads
Reference nos. and dimensions:
| AVK ref. no. | DN mm |
A mm |
B mm |
C mm |
D mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|
| 851-050-10-923008 | 50 | 266 | 210 | 81 | 162 | 20 |
| 851-080-10-923008 | 80 | 345 | 236 | 111 | 222 | 32 |
| 851-100-10-923008 | 100 | 417 | 255 | 146 | 292 | 52 |
| 851-150-10-923008 | 150 | 417 | 255 | 146 | 292 | 73 |
Components
| 1. | Body | Ductile iron GJS-500-7 |
| 2. | Cover | Ductile iron GJS-500-7 |
| 3. | Seat ring | ABS plastic |
| 4. | Seat support ring | ABS plastic |
| 5. | Float | ABS plastic |
| 6. | Float guide | ABS plastic |
| 7. | Body | Ductile iron GJS-500-7 |
| 8. | Screw | Stainless steel AISI 316 |
| 9. | Hex nut | Stainless steel AISI 316 |
| 10. | Screw | Stainless steel AISI 316 |
| 11. | Orifice cover | Nylon |
| 12. | Orifice bracket | Nylon |
| 13. | Gasket | EPDM rubber |
| 14. | Fulcrum pin | Stainless steel AISI 316 |
| 15. | Adjusting screw | Stainless steel AISI 316 |
| 16. | Seal | EPDM rubber |
| 17. | Float and lever | ABS plastic |
| 18. | Float | ABS plastic |
| 19. | Gasket | EPDM rubber |
| 20. | Body | Ductile iron GJS-500-7 |
Test/Approvals
- Hydraulic test according to AS 4956: Seat: 1,1 x PN. Body: 1,5 x PN
- ISO 14001 certified - SAI Global Environment
- ISO 9001 certified - SAI Global Quality
Standards
- AS/NZS 4956
- Flange drilling to AS 2129 table F
