Right side free shaft, DN50-300, PN10/16

Metal seated swing check valve with free shaft for drinking water and neutral liquids to max. 70° C

AVK swing check valves provide easy access to maintenance simply by unscrewing a few bolts and lifting the bonnet assembly including shaft and disc out of the body. The disc is fully vulcanized with EPDM rubber and is mounted in a nylon bushing allowing it to move slightly horizontally and vertically to achieve compete tightness. AVK swing check valves are available with closed bushings and with free shaft for mounting of lever and weight/spring.

Variant 41/39-001
Connection: Flanged
Material: Ductile Iron
DN: DN50 - DN300
PN: PN 16


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.

Reference nos. and dimensions:

AVK ref. no. DN
41-050-39-01800 50 PN10/16 203 125 210 243 148 15
41-080-39-01800 80 PN10/16 241 140 240 238 138 16
41-100-39-01800 100 PN10/16 292 155 265 265 165 21
41-150-39-01800 150 PN10/16 356 220 360 333 198 37
41-200-39-01800 200 PN16 495 250 420 388 223 60
41-250-39-01800 250 PN16 622 347 560 692 389 132
41-300-39-01800 300 PN16 699 395 650 695 385 209


Datasheet (PDF)
Related Datasheets
Installation, Operation & Maintenance
Outline drawings DWG
Outline drawings DXF
Outline drawings IGS
Price list


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
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
17. O-ring NBR
18. Spacer Stainless Steel 1.4401 (316)
19. Key Stainless Steel 1.4401 (316)
20. O-ring NBR
21. Bushing, open Brass CW614N


  • Hydraulic test according to EN 1074-1 / EN 12266

  • Seat: 1.1 x PN. Body: 1.5 x PN. 


  • Designed according to EN 1074 - 3
  • Standard flange drilling to EN1092 (ISO 7005-2), PN 16
  • WIMES 8.09 Compliant
  • Drinking Water Inspectorate Regulation 31 compliant
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