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AVK DOUBLE ORIFICE AIR VALVE, PN16

ABS float/guide/seat, EPDM seal, DN50-DN150, Flange drilling AS/NZS 4087 B5

AVK Wingfield Plant

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AVK Australia Civil

559A Grand Junction Road Wingfield SA 5013 Sales and Technical enquiry

Air relief valve 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 accordance with AS/NZS 4158, to ensure high durability. All other components are made of approved polymer material or stainless steel to reduce corrosion risk even further.

Variant 851/20-008
Connection: Flanged
Material: Ductile Iron
DN: DN50 - DN150
PN: PN16

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
Installation, Operation & Maintenance
Product Brochure

Reference nos. and dimensions:

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AVK ref. no. DN
mm		 A
mm		 B
mm		 C
mm		 D
mm		 Theoretical
weight / kg
851-050-20-523000 50 266 210 81 162 21
851-080-20-523000 80 345 236 111 222 32
851-100-20-523000 100 417 255 146 292 52
851-150-20-523000 150 417 255 146 292 73
2D/3D drawings
Enquiry
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Components

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

Standards

  • Designed to: AS/NZS 4956
  • Flange drilling to AS/NZS 4087 B5
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