AVK DOUBLE ORIFICE AIR RELIEF VALVE, PN25
Float, float guides and guide ring in ABS, fasteners in antifriction coated A4, 300 µm EP coating
Contact
Chan Chee Leong
Senior Manager, Sales and Marketing
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 851/10-001 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN50 - DN150 |
| PN: | PN 25 |
Features
- Triple function with rapid air release, rapid air intake and venting
- 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
- All composite materials in contact with the medium are approved for drinking water
- All other internal parts are highly corrosion resistant AISI 316 stainless steel or ABS
- No moving parts are touching the internal coating
- All composite materials in contact with the medium are approved for drinking water
Downloads
Reference nos. and dimensions:
| Reference no. | Gross Price MYR |
DN mm |
Flange drilling |
H3 mm |
W mm |
W1 mm |
W6 mm |
Dh mm |
Ds mm |
No. of bolts |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 851-050-10-722000 | 2,582 | 50 | PN25 | 276 | 162 | 81 | 205 | 125 | 19 | 4 | 18 |
| 851-080-10-722000 | 3,997 | 80 | PN25 | 345 | 222 | 111 | 231 | 160 | 19 | 8 | 31 |
| 851-100-10-722000 | 5,662 | 100 | PN25 | 416 | 292 | 146 | 250 | 190 | 23 | 8 | 50 |
| 851-150-10-722000 | 6,556 | 150 | PN25 | 417 | 292 | 146 | 250 | 250 | 28 | 8 | 54 |
| 851-200-10-722000 | price on request | 150 | PN25 | 417 | 292 | 146 | 250 | 310 | 28 | 12 | 60 |
Components
| 1. | Body | Ductile iron GJS-500-7 (GGG-50) |
| 2. | Guide bottom | ABS plastic |
| 3. | Guide top | ABS plastic |
| 4. | Plug | Plastic |
| 5. | Orifice, large | ABS plastic |
| 6. | Guide ring | ABS plastic |
| 7. | Seal ring | EPDM rubber |
| 8. | Seat ring | ABS plastic |
| 9. | Washer | Stainless steel A4 |
| 10. | Nut | Stainless steel A4 |
| 11. | Cowl | Ductile iron GJS-500-7 (GGG-50) |
| 12. | Bonnet | Ductile iron GJS-500-7 (GGG-50) |
| 13. | O-ring | EPDM rubber |
| 14. | Orifice cover | Polyamide |
| 15. | Orifice bracket | Polyamide |
| 16. | Gasket | EPDM rubber |
| 17. | Grooved pin | Stainless steel A4 |
| 18. | Orifice, small | ABS plastic |
| 19. | Side chamber | Ductile iron GJS-500-7 (GGG-50) |
| 20. | Bolt | Stainless steel A4 |
| 21. | Bolt | Stainless steel A4 |
| 22. | Washer | Stainless steel A4 |
Test/Approvals
- Hydraulic test according to 1.5 x PN
- Materials approved according to WRAS
Standards
- EN 1074-4
- Flange drilling EN1092, PN25
