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AIR RELIEF VALVE, RAPID FILL PREVENTION, PN16-PN35

FOX 3F-RFP, Full Bore for Clean Water, AS 4956, DN25-DN250

CHAN

Contact

Chan Chee Leong

Senior Manager, Sales and Marketing

Air relief valve for clean water and neutral liquids to max., 70°C

AVK air releaf valve, rapid fill prevention valve with large oriface ensure a controled filling operation of the pipeline network by adjusting the air outflow capacity. Further it has been designed to allow release of air pockets accumulated under working conditions, the entrance of large volumes of air during draining operations and pipeline bursts and the air discharge with controlled speed, to prevent water hammer. The valve are generally used near pumps, where there are changes in slope ascending and at high points where the pipeline is subjected to water hammer.

Variant 861/02-002
Connection: Flanged
Material: Ductile iron
PN: PN16/35

Features

  • The rapid filling preventer automatically adjust the outflow capacity thereby reducing the velocity of the incoming water column and minimizing the risk og water hammer. Uncontrolled filling operations and transient events will inevitably generate the rapid closure of the air valves installed in the system with consequent damages. This type of valve will minimize the risk of this occurring.
  • The spray effect during closing and the risk of drowning are reduced compared to standard combination air valves.
  • Single chamber body in ductile cast iron, is provided with intenal ribs for a consistant and accurate guiding of the mobile block.
  • Mobile block composed of a main float and upper disc, joined together by an air release system in AISI 316, and a additional anti surge obturator.
  • Nozzle and gasket holder are wear resistant due to the gasket compression control.
  • Cover in ductile iron and screen in stainless steel prevents materials and insects entering the valve. Outlet for submerged applications are optional.
  • Working conditions 0,2 - 40 bar differential pressure

Downloads

Datasheet

Components

1. Body Ductile iron GJS-450-10
2. Cap Ductile iron GJS-450-10
3. O-ring NBR rubber
4. O-ring NBR rubber
5. Seat Stainless steel AISI 316
6. Nuts Stainless steel A4
7. Disc, upper part Polypropylene
8. Nozzle Stainless steel AISI 316
9. Float Polypropylene
10. Studs Stainless steel A4
11. Nuts Stainless steel A4
12. Washer Stainless steel A4
13. Disc Stainless steel AISI 316
14. Screw Stainless steel A4
15. Drain plug Stainless steel AISI 316
16. Spacer Stainless steel AISI 316
17. Screen Stainless steel AISI 304
18. Name plate Stainless steel AISI 304

Test/Approvals

  • Hydraulic pressure test to: Body 1.5 PN & Seat 1.2 PN
  • ISO 9001 certified - SAI Global Quality
  • ISO 14001 certified - SAI Global Environment
  • ISO 45001 certified - SAI Global Certification
  • StandardsMark approved to AS 4956

Standards

  • AS 4956
  • Flange drilling to AS/NZS 4087 B5/B6
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