AVK SWING CHECK VALVE WITH FREE SHAFT, PN 16, DN50-300
Cast iron seated BS body, rubber seated disc, EPDM rubber/brass bushing
Anthony Whittam
Network Water Specialist
Resilient seated swing check valve with free shaft end 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 41/20-001 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile Iron |
| DN: | DN50 - DN300 |
| PN: | PN 16 |
Features
- Resilient seat provides a drop tight closure and due to the light weight it requires a minimum of force to open/close
- Shaft fitted in the bonnet allowing for easy maintenance without removing valve from pipeline
- Shaft material 1.4021 AISI (320) stainless steel
- Free protruding shaft end for mounting of lever and weight or spring to assist valve closing and avoid water hammer
- Hinge of stainless steel for sizes ≤ DN 200; ductile iron coated with drinking water approved epoxy for larger
- Bonnet gasket in a groove between bonnet and body to prevent blow-out
- All seals and coatings with contact to the fluid are approved for drinking water - coating is blue, 250μm fusion bonded epoxy
- Disc is designed with a steel or ductile iron insert fully vulcanized with EPDM rubber
- Bosses on each side of the valve seat allow for installation of pressure gauge, by-pass, etc.
- WRAS approved materials
Downloads
| AVK_swing_check_valve_animation.mp4 |
Reference nos. and dimensions:
| Ref. no. | DN mm |
Flange drillling |
L mm |
H mm |
W mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|
| 41-050-20-018 | 50 | PN10/16 | 203 | 110 | 233 | 14 |
| 41-080-20-018 | 80 | PN10/16 | 241 | 140 | 233 | 17 |
| 41-100-20-018 | 100 | PN10/16 | 292 | 150 | 256 | 22 |
| 41-150-20-018 | 150 | PN10/16 | 356 | 195 | 334 | 42 |
| 41-200-20-008 | 200 | PN10 | 495 | 230 | 386 | 67 |
| 41-200-20-018 | 200 | PN16 | 495 | 230 | 386 | 67 |
| 41-250-20-018 | 250 | PN16 | 622 | 270 | 692 | 161 |
| 41-300-20-008 | 300 | PN10 | 698 | 300 | 692 | 238 |
| 41-300-20-018 | 300 | PN16 | 698 | 300 | 692 | 238 |
Components
| 1. | Bolt | Stainless steel A4 |
| 2. | Nut | Stainless steel A2 |
| 3. | Washer | Stainless steel A4 |
| 4. | Bushing | PA |
| 5. | Disc | Steel S235JR |
| 6. | Body | Ductile Iron GJS-500-7 |
| 7. | Gasket | EPDM |
| 8. | Bolt | Stainless steel A2 |
| 9. | Pin | Stainless steel A4 |
| 10. | Hinge | Stainless steel 316 |
| 11. | Key | Stainless steel A4 |
| 12. | Bonnet | Ductile Iron GJS-500-7 |
| 13. | Washer | Stainless steel A4 |
| 14. | Thrust plate | Stainless steel |
| 15. | Bushing, closed | DZR brass |
| 16. | Tab washer | Stainless steel A4 |
| 17. | Bolt | Stainless steel A4 |
| 18. | Shaft | Stainless steel 420 |
| 19. | O-ring | EPDM |
| 20. | O-ring | EPDM |
| 21. | Bushing, open | DZR brass |
| 22. | O-ring | EPDM |
Standards
- Designed according to EN 1074 - 3
- Face to face according to EN 558 Table 2 Basic Series 10
- Standard flange drilling to EN1092 (ISO 7005-2), PN 10/16
- WIMES 8.09 Compliant
- Drinking Water Inspectorate Regulation 31 compliant
