AVK DOUBLE ORIFICE AIR RELIEF VALVE, PN10/16
EN std. flange, SS 304L float/SS 304L guide/SS 304L seat, EPDM seal, A2 bolts, A4/GZ nuts, 250µm WRAS EP
Contact
AVK Valves India Pvt Ltd
117 & 118, 1st Floor, Road Number 3 Vijayanagar, EPIP Phase I, Whitefield, Bengaluru, Karnataka 560066, India
Air relief valve for clean water (not sewage or waste water) and other neutral liquids to max. 70°C
AVK series 851 double orifice 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 'Aerokinetic' design allows for a large airflow 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 float chamber. All iron components are protected with a coating of drinking water approved, fusion bonded epoxy that ensures high durability. All other components are made of either a drinking water approved polymer material or stainless steel to reduce corrosion risk even further. All seals are drinking water approved EPDM rubber featuring an excellent compression set and ability to regain its original shape.
| Variant 851/4A-003 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN40 - DN200 |
| PN: | PN 16 |
Features
- Double orifice design with one large orifice for air relief or intake when filling or emptying the pipe and one small for venting when the system is in service and under pressure
- Large air flow capacity with a special float design that prevents the rushing air from prematurely closing the valve
- The resilient seals are made of drinking water approved EPDM
- Internal parts float, guide and seat ring in stainless steel AISI 304L
- All composite materials in contact with the medium are approved for drinking water
- Stainless steel A2 bolts with DeltaSeal GZ coated A4 nuts
- Iron parts with contact to the water are corrosion protected with epoxy, RAL 5017, 250 µm, drinking water approved by WRAS
Downloads
Reference nos. and dimensions:
| AVK ref. no. | Flange drilling |
DN mm |
D mm |
H3 mm |
W mm |
W1 mm |
W6 mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|
| 851-040-4A-11C000 | PN10/16 | 40 | 50 | 277 | 165 | 82 | 220 | 16 |
| 851-050-4A-11C000 | PN10/16 | 50 | 50 | 277 | 165 | 82 | 220 | 16 |
| 851-080-4A-11C000 | PN10/16 | 80 | 80 | 277 | 165 | 82 | 220 | 17 |
| 851-100-4A-11C000 | PN10/16 | 100 | 100 | 283 | 205 | 102 | 248 | 23 |
| 851-150-4A-11C000 | PN10/16 | 150 | 150 | 345 | 255 | 127 | 286 | 36 |
| 851-200-4A-01C000 | PN10 | 200 | 150 | 345 | 255 | 127 | 286 | 40 |
| 851-200-4A-11C000 | PN16 | 200 | 150 | 345 | 255 | 127 | 286 | 40 |
Components
| 1. | Body | Ductile iron GJS-500-7 |
| 2. | Float, small orifice | Stainless steel AISI 304L |
| 3. | Split pin | Stainless steel A2 |
| 4. | O-ring | EPDM rubber |
| 5. | Bonnet | Ductile iron GJS-500-7 |
| 6. | Gasket | EPDM rubber |
| 7. | Orifice bracket | Polyamide |
| 8. | Orifice cover | Polyamide |
| 9. | Seal | EPDM rubber |
| 10. | Plug | Plastic |
| 11. | Cowl | Ductile iron GJS-500-7 |
| 12. | Bolt | Stainless steel A2 |
| 13. | Bonnet | Ductile iron GJS-500-7 |
| 14. | Seal ring | EPDM rubber |
| 15. | Seat ring | Stainless steel AISI 304L |
| 16. | Float, large orifice | Stainless steel AISI 304L |
| 17. | Float guide | Stainless steel AISI 304L |
| 18. | Nut | Stainless steel A4 |
| 19. | Bolt | Stainless steel A2 |
Test/Approvals
- Hydraulic test according to EN 1074-1 / EN 12266
- WRAS approved materials
- Licensed by BIS acc. to IS 14845, CM/L 6300011673
Standards
- EN 1074-4
- Flange drilling to EN1092, PN10/16
