AVK RECOIL CHECK VALVE, SINGLE DOOR, DN 350 - 500, PN 25
Gunmetal Seat Ring, AISI316 Hing Pin
Anthony Whittam
Head of Smart Water and Pressure Management
Recoil check valve for drinking water and neutral liquids to max. 70° C
AVK ball check valves are self-cleaning and with full bore. The ball rotates during operation eliminating the risk of impurities getting stuck on the ball. The full and smooth bore ensures full flow with low pressure loss and eliminates the risk of deposits at the bottom. AVK ball check valves are available with flanges and internal threads. They are delivered with NBR lined ball as standard and optionally with ball of polyurethane available in different weights.
| Variant 641/14-003 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile Iron |
| PN: | PN 25 |
Features
Full bore and low head loss.
Shaft of stainless steel fitted in the bonnet allowing easy access to maintenance.
Hinge of ductile iron tightened around the shaft with bolts to eliminate play and thus ensure durability
Bonnet gasket of EPDM rubber in a groove between bonnet and body.
Disc of epoxy coated ductile iron with face ring of aluminium bronze.
The disc is mounted in a nylon bushing, which allows it to move slightly both horizontally and vertically to close completely tight also in case of minor impurities in the seat.
Body and bonnet of ductile iron with epoxy coating to DIN 30677-2.
A guard covering the lever and weight is available as an optional extra.
Seat ring of aluminium bronze.
Downloads
Components
| 1. | Body outlet | Ductile Iron GJS-500-7 |
| 2. | O-cord | EPDM |
| 3. | Body inlet | Ductile Iron GJS-500-7 |
| 4. | Seat ring | Bronze CC491K |
| 5. | O-cord | EPDM |
| 6. | Stopper | Ductile Iron GJS-500-7 |
| 7. | Face ring | Bronze CC491K |
| 8. | Disc | Ductile Iron GJS-500-7 |
| 9. | Cover | Ductile Iron GJS-500-7 |
| 10. | Gasket | PA |
| 11. | Air vent | Alu-bronze CC333G |
| 12. | O-cord | EPDM |
| 13. | Washer | Stainless steel A4-70 |
| 14. | Bolt | Stainless steel A4-70 |
| 15. | Nut | Stainless steel A4-70 |
| 16. | Washer | Stainless steel A4-70 |
| 17. | Stud | Stainless steel A4-70 |
| 18. | Hinge pin | Stainless steel 1.4401 |
| 19. | Bush | Alu-bronze CW307G |
Test/Approvals
- Seat: 1.1 x PN. Body: 1.5 x PN.
Standards
- Designed according to manufacturer standard
- Face to face Length in Accordance with Manufacturers Standard
- Standard flange drilling to EN1092 (ISO 7005-2), PN 25