AVK SWING CHECK VALVE WITH FREE SHAFT, PN 16, DN350-600
Aluminium bronze seated BS body, metal seated disc, WRAS approved EPDM rubber
Anthony Whittam
Head of Smart Water and Pressure Management
Metal seated swing check valve with free shaft for drinking water and neutral liquids to max. 70° C
AVK series 41 swing check valves come with both metal and resilient seats. Installed in pumping applications to prevent back flow they can be used for drinking water as well as waste water. The disc is connected to the shaft via a flexible bush that allows disc and valve seat to adjust exactly. All interior parts are stainless steel or coated with drinking water approved epoxy or EPDM. The series 41 valves are available with either closed bushings or protruding shaft end where a lever with a weight or a spring can be fitted to mitigate pressure surges.
| Variant 41/39-004 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile Iron |
| DN: | DN350 - DN600 |
| PN: | PN 16 |
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.
- Possible to mount lever and weight for installations with an increased risk of water hammer at standard velocities. The weight is adjustable on the lever to achieve an optimum closing speed and a careful closing against the seat. Can be installed in different positions.
- A guard covering the lever and weight is available as an optional extra.
- Seat ring of aluminium bronze.
- WRAS approved product
Downloads
| AVK_swing_check_valve_animation.mp4 |
Reference nos. and dimensions:
| Ref. no. | DN mm |
Flange drillling |
L mm |
H mm |
H3 mm |
W mm |
W1 mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|
| 41-350-39-01800 | 350 | PN16 | 800 | 419 | 689 | 705 | 415 | 233 |
| 41-400-39-01800 | 400 | PN16 | 900 | 470 | 765 | 775 | 450 | 305 |
| 41-450-39-01800 | 450 | PN16 | 1000 | 518 | 843 | 845 | 485 | 436 |
| 41-500-39-01800 | 500 | PN16 | 1100 | 570 | 935 | 905 | 515 | 577 |
| 41-600-39-01800 | 600 | PN16 | 1300 | 630 | 1060 | 1019 | 572 | 791 |
Components
| 1. | Body | Ductile iron GJS-500-7 |
| 2. | Washer | Stainless steel A2 |
| 3. | Nut | Stainless steel A2 |
| 4. | Stud bolt | Stainless steel A2 |
| 5. | Face ring | Alu-bronze CC331G (AB1) |
| 6. | Seat ring | Alu-bronze CC331G (AB1) |
| 7. | Bonnet | Ductile iron GJS-500-7 |
| 8. | Bolt | Stainless steel A2 |
| 9. | O-cord | EPDM |
| 10. | Guide bush | EPDM |
| 11. | Washer | Stainless steel A2 |
| 12. | Split pin | Stainless steel A2 |
| 13. | Castle nut | Stainless steel A2 |
| 14. | Stud bolt | Stainless steel A2 |
| 15. | Hinge arm | Ductile iron GJS-500-7 |
| 16. | Disc | Ductile iron GJS-500-7 |
| 17. | Protective bush | EPDM |
| 18. | Washer | Stainless Steel 1.4401 (316) |
| 19. | Bolt | Stainless steel A2 |
| 20. | O-ring | EPDM |
| 21. | Bushing, open | Brass CW602N (CZ132) |
| 22. | O-ring | EPDM |
| 23. | Gasket | PA |
| 24. | Air plug | Stainless steel |
| 25. | Shaft | Stainless steel 1.4021 (420) |
| 26. | Connector | Stainless steel 1.4408 |
| 27. | Spacer | Stainless steel 1.4404 (316L) |
| 28. | O-ring | EPDM |
| 29. | Bushing, closed | Brass CW602N (CZ132) |
Test/Approvals
- Hydraulic test according to EN 1074-1 / EN 12266 |
- Seat: 1.1 x PN. Body: 1.5 x PN.
Standards
- Designed according to EN 1074 - 3
- Face to face according to EN 558 Table 2 Basic Series 48
- Standard flange drilling to EN1092, PN 10/16
- WIMES 8.09 Compliant
- Drinking Water Inspectorate Regulation 31 compliant
