AVK SWING CHECK VALVE, METAL SEATED
Right-side lever and weight, DN 50-300, PN10/16
Anthony Whittam
Head of Smart Water and Pressure Management
Metal seated swing check valve with lever and weight 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 41/36-009 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile Iron |
| DN: | DN80 - DN300 |
| PN: | PN 16 |
Features
- Metal seat in gunmetal bronze for high durability
- Shaft fitted in the bonnet allowing for easy maintenance without removing valve from pipeline
- Shaft in 1.4021 (AISI 420), bolts and washers in 1.4301 (AISI 304) acid resistant stainless steel
- Position indicating lever with an adjustable weight that aids the disc in closing quickly to reduce water hammer
- Hinge of stainless steel for sizes ≤ DN 200; ductile iron coated with drinking water approved epoxy for larger
- Ductile iron disc covered with drinking water approved EPDM
- Bonnet gasket lying in a groove between bonnet and body prevents blow-out
- All seals and coatings with contact to the fluid are approved for drinking water - coating is blue, 250µm fusion bonded epoxy
- Disc mounted in a flexible rubber bushing allowing it to tilt slightly in all directions and adjust exactly to the valve seat
- Bosses on each side of the valve seat allow for installation of pressure gauge, by-pass, etc.
- WRAS approved materials
Downloads
Reference nos. and dimensions:
| Ref. no. | DN mm |
Flange drillling |
L mm |
H mm |
H3 mm |
W mm |
W1 mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|
| 41-080-36-01800 | 80 | PN10/16 | 241 | 140 | 240 | 245 | 145 | 19 |
| 41-200-36-01800 | 200 | PN16 | 495 | 250 | 420 | 395 | 230 | 64 |
| 41-250-36-01800 | 250 | PN16 | 622 | 347 | 560 | 712 | 409 | 145 |
| 41-300-36-01800 | 300 | PN16 | 699 | 395 | 650 | 715 | 405 | 195 |
Components
| 1. | Bolt and nut | Stainless steel A2 |
| 2. | Body | Ductile Iron GJS-500-7 |
| 3. | Washer | Stainless steel A2 |
| 4. | Disc | EPDM encaps. duct. iron |
| 5. | Hinge | DN≤200 SS, DN≥250 DI |
| 6. | Gasket | EPDM |
| 7. | Face ring | Bronze CC491K |
| 8. | O-ring | NBR rubber |
| 9. | Seat ring | Bronze CC491K |
| 10. | Washer | Copper |
| 11. | Air plug | Stainless Steel 1.4401 (316) |
| 12. | Bonnet | Ductile Iron GJS-500-7 |
| 13. | Connector | Stainless Steel 1.4408 (316) |
| 14. | Bushing, closed | Brass CW614N |
| 15. | Shaft | Stainless steel 1.4021 (420) |
| 16. | O-ring | NBR rubber |
| 17. | O-ring | NBR rubber |
| 18. | Spacer | Stainless Steel 1.4401 (316) |
| 19. | Key | Stainless Steel 1.4401 (316) |
| 20. | O-ring | NBR rubber |
| 21. | Bushing, open | Brass CW614N |
| 22. | Lever | Ductile Iron GJS-500-7 |
| 23. | Weight | Ductile Iron GJS-500-7 |
| 24. | Screw | Stainless steel A2 |
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 10
- Standard flange drilling to EN1092 (ISO 7005-2), PN 10/16
- WIMES 8.09 Compliant
- Drinking Water Inspectorate Regulation 31 compliant