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AVK DOUBLE ORIFICE AIR VALVE WITH IN-FLOW CHECK VALVE

BS/AS flange, ABS float/ABS guide/ABS seat, EPDM seal, GZ coated A4 fasteners, AS coating

Air relief valve, ABS internal parts, EPDM seals, PN 25, for water and neutral liquids to max. 70°C

AVK series 851 double orifice, triple action air valves are designed to allow air to rapidly either escape or enter the pipe system when filling or draining, as well as for automatic discharge of accumulated air during normal working conditions. The unique ‘Aerokinetic’ design allows air to rush out of the system at great speed without forcing the float upwards and closing it prematurely. This makes sure that the valve closes only after all air has left the system and water has entered the chamber.
All iron components are protected with fusion bonded epoxy coating in a GSK-approved process to ensure high durability. All other components are made of either WRAS approved polymer material or stainless steel to reduce corrosion risk even further. All seals are made of WRAS approved EPDM rubber featuring an excellent compression set and ability to regain its original shape.

Variant 851/10-004
Connection: Flanged
Material: Ductile iron
DN: DN50 - DN150
PN: PN 25

Features

  • Cylindrical large Orifice float
  • Embodies unique aerokinetic feature
  • Does not shut prematurely
  • Release of large volumes of air during pipeline filling
  • Allows inflow of large volumes of air when pipe is emptied
  • Release of air under pressure
  • Low maintenance
  • Streamlined air flow

Downloads

Datasheet

Reference nos. and dimensions:

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AVK ref. no. DN
mm		 A
mm		 B
mm		 C
mm		 D
mm		 Theoretical
weight/kg
851-050-10-923008 50 276 205 81 162 20
851-080-10-923008 80 345 231 111 222 32
851-100-10-923008 100 416 250 146 292 52
851-150-10-923008 150 417 250 146 292 73
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Components

1. Body Ductile iron GJS-500-7
2. Cover Ductile iron GJS-500-7
3. Seat ring ABS plastic
4. Seat support ring ABS plastic
5. Float ABS plastic
6. Float guide ABS plastic
7. Body Ductile iron GJS-500-7
8. Screw Stainless steel AISI 316
9. Hex nut Stainless steel AISI 316
10. Screw Stainless steel AISI 316
11. Orifice cover Nylon
12. Orifice bracket Nylon
13. Gasket EPDM rubber
14. Fulcrum pin Stainless steel AISI 316
15. Adjusting screw Stainless steel AISI 316
16. Seal EPDM rubber
17. Float and lever ABS plastic
18. Float ABS plastic
19. Gasket EPDM rubber
20. Body Ductile iron GJS-500-7

Test/Approvals

  • Hydraulic test according to AS 4956:  Seat: 1,1 x PN, Body: 1,5 x PN
  • ISO 45001 certified - SAI Global Certification
  • ISO 14001 certified - SAI Global Environment
  • ISO 9001 certified - SAI Global Quality

Standards

  • AS/NZS 4956
  • Flange drilling to AS 2129 table F
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