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AVK SWING CHECK VALVE, RESILIENT SEATED, PN10/16

BS 5153 short, enclosed SS shaft, brass bushings, EPDM, A2 bolts

Resilient seat swing check valve to EN 1074 standard. 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 41/21-001
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 stainless steel 1.4021 (AISI 420)
  • 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
  • 250 µm fusion bonded epoxy coating
  • Disc design with a steel or ductile iron insert fully vulcanized with drinking water approved 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
41-050-21-018 50 PN10/16 203 121 190 13
41-080-21-018 80 PN10/16 241 136 200 17
41-100-21-018 100 PN10/16 292 151 220 21
41-150-21-018 150 PN10/16 356 211 285 41
41-200-21-008 200 PN10 495 249 340 63
41-200-21-018 200 PN16 495 249 340 63
41-250-21-008 250 PN10 622 346 606 150
41-250-21-018 250 PN16 622 346 606 150
41-300-21-008 300 PN10 699 388 606 201
41-300-21-018 300 PN16 699 388 606 201
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Components

1. Bolt Stainless steel A2
2. Nut Stainless steel A2
3. Washer Stainless steel A2
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 A2
10. Hinge Stainless steel AISI 316
11. Key Stainless steel A2
12. Bonnet Ductile iron GJS-500-7 (GGG-50)
13. Washer Stainless steel A2
14. Bushing, closed Brass DZR
15. Tab washer Stainless steel A4
16. Bolt Stainless steel A2
17. Shaft Stainless steel AISI 420
18. O-ring EPDM rubber
19. 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 according to EN1092-2
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