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AVK AIR RELIEF VALVE, RAPID FILL PREVENTION, EN1092, 16-40 BAR

Lynx 3F-RFP, red. bore, clean water, A2 bolts, Delta Seal GZ A4 nuts fasteners, 250µm blue RAL5005 EP coating

CHAN

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Chan Chee Leong

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Air relief valve for clean water and neutral liquids to max., 70°C. Used in applications as transmission lines, water distribution networks and for irrigation.

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 861/12-001
Connection: No connection type specified
Material: Ductile iron
DN: DN50 - DN400

Features

  • The rapid filling preventer automatically adjust the outflow capacity thereby reducing the velocity of the incoming water column and minimizing the risk og wter 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 the 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 sreen 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

Reference nos. and dimensions:

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Reference no. Gross Price
MYR		 DN
mm		 Flange
drilling		 PN
Class		 L
mm		 H3
mm		 Theoretical
weight/kg		 Notes
861-0050-12-0111 2,726 50 PN16 PN16 165 236 7.0
861-0050-12-0911 2,490 50 117 231 5.0 2" BSP thread
861-0080-12-0111 3,604 80 PN16 PN16 210 305 11
861-0100-12-0111 4,979 100 PN16 PN16 235 303 14
861-0150-12-0111 6,551 150 PN16 PN16 305 337 23
861-0200-12-0111 12,578 200 PN16 PN16 375 515 55
861-0250-12-0111 22,955 250 PN16 PN16 450 625 101
861-0300-12-0111 38,454 300 PN16 PN16 485 735 127
861-0350-12-0111 60,387 350 PN16 PN16 580 850 251
861-0400-12-0111 91,700 400 PN16 PN16 660 995 304
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Components

1. Body Ductile iron GJS-500-7
2. Cap Ductile iron GJS-500-7
3. O-ring NBR rubber
4. O-ring NBR rubber
5. Seat Stainless steel AISI 304
6. Disc Polyethylene
7. Nozzle Stainless steel AISI 316
8. Float Polypropylene
9. Studs Stainless steel A2
10. Nuts Stainless steel A2
11. Spacer Stainless steel A2
12. Nuts Stainless steel A2
13. Washer Stainless steel A2
14. Disc Stainless steel AISI 304
15. Screw Stainless steel A2
16. Drain valve Stainless steel AISI 303
17. Screen Stainless steel AISI 304
18. Label Stainless steel AISI 304

Test/Approvals

  • Hydraulic test according to EN 1074-1 and 4 / EN 12266
  • Approved according to EN 1074-1 and 4

Standards

  • AWWA C512, EN 1074-4
  • Flange drilling to EN1092, PN10/16/25/40
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