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AVK SWING CHECK VALVE, RESILIENT SEATED, PN10/16

Right side free shaft end

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 420) 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.

Reference nos. and dimensions:

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AVK ref. no. DN
mm		 Flange
drilling		 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
41-250-20-008 250 PN10 622 270 692 161
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
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Components

1. Bolt Stainless steel A4
2. Nut Stainless steel A2
3. Washer Stainless steel A4
4. Bushing Polyamide
5. Disc Steel S235JR
6. Body Ductile iron GJS-500-7 (GGG-50)
7. Gasket EPDM rubber
8. Bolt Stainless steel A2
9. Pin Stainless steel A4
10. Hinge Stainless steel AISI 316
11. Key Stainless steel A4
12. Bonnet Ductile iron GJS-500-7 (GGG-50)
13. Washer Stainless steel A4
14. Thrust plate Stainless steel
15. Bushing, closed Brass DZR
16. Tab washer Stainless steel A4
17. Bolt Stainless steel A4
18. Shaft Stainless steel AISI 420
19. O-ring EPDM rubber
20. O-ring EPDM rubber
21. Bushing, open Brass DZR
22. O-ring EPDM rubber

Test/Approvals

  • Approved according to WRAS Certificate No. 1811031 to max. 50°C

Standards

  • EN 1074-3
  • Face-to-face dimension according to EN 558, Series 10
  • Flange drilling to EN1092, PN10/16
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