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AVK CONTROL VALVE, SURGE ANTICIPATION, PN10/16

Full bore, AISI 316, 300µm blue EP coating

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AVK Philippines Inc.

#70 West Avenue, Brgy. West Triangle 1104 Quezon City Metro Manila, PH

Surge anticipation control valve, full bore, for water and neutral liquids to max. 70° C

AVK series 859 diaphragm actuated surge anticipation and relief control valves constantly monitor the system pressure to protect against pressure surges. The surge anticipating pilot senses the rapid pressure drop caused by e.g. a power failure to the pump, often followed by a rapid and dangerous high-pressure surge. The drop below the low anticipating pilot setpoint opens the valve to anticipate the upcoming high-pressure surge. When the pressure from the high-pressure surge hits the valve, the pressure relief pilot opens the valve to dump excess pressure when exceeding the high relief pilot setpoint. When the normal system pressure is in between the respectively high and low pilot setpoints, the valve is closed. Precise setting and easy adjustment on the pilot handles without use of any tools.

Variant 859/1017-001
Connection: Flanged
Material: Ductile iron
DN: DN100 - DN200
PN: PN 10/16

Features

  • The lifted seat design ensures less damage to the internal surface of the valve body in the vicinity of the seat area, due to cavitation
  • The parabolic shape of the plug creates a smooth regulating characteristic with low gain around the near-closed positions improving control performance at low flow
  • Non-symmetric axial position of rubber diaphragm results in low stretch stress when closed
  • Body and bonnet of ductile iron coated with fusion bonded epoxy, 300 micron, GSK approved, RAL 5017, according to DIN 3476 and WRAS-DVGW/W270/UBA
  • All rubber parts approved for drinking water
  • All non-coated internal parts in stainless steel
  • A needle valve fitted to the connection of the control chamber, allows for adjustment of the regulation reaction time
  • Closing the needle valve isolates the control chamber and fixes the position of the main valve plug. This allows for service of the pilot circuit, cleaning filter etc. without causing the valve to open fully

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Datasheet

Reference nos. and dimensions:

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AVK ref. no. DN
mm		 Flange
drilling		 Lo press.
range/bar		 Hi press.
range/bar		 L
mm		 W1
mm		 W2
mm		 H3
mm		 Theoretical
weight/kg
859-0100-10-1140016 100 PN10/16 0.6 - 6 10 - 16 350 140 210 466 32
859-0150-10-1140015 150 PN10/16 0.6 - 6 5 - 10 480 203 210 571 73
859-0200-10-1140015 200 PN16 0.6 - 6 5 - 10 600 253 253 683 125
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Components

1. O-ring EPDM rubber
2. Plug sealing EPDM rubber
3. Washer Stainless steel A4
4. Bolt Stainless steel A4
5. Diaphragm EPDM rubber
6. Nut Stainless steel A4
7. Stem Stainless steel 1.4462, duplex
8. Stem guide Stainless steel AISI 316
9. Bonnet Ductile iron GJS-500-7 (GGG-50)
10. Spring Stainless steel AISI 316
11. Diaphragm support Stainless steel AISI 316
12. Distance pipe Stainless steel AISI 316
13. Disc retainer Stainless steel AISI 316
14. Regulating plug Stainless steel AISI 316
15. Seat Stainless steel AISI 316
16. Body Ductile iron GJS-500-7 (GGG-50)
17. Pilot valve Stainless steel AISI 316
18. Air vent Stainless steel AISI 316
19. Filter Stainless steel AISI 316
20. Gasket EPDM rubber
21. Body Stainless steel AISI 316
22. Plug Stainless steel A4
23. Insert Stainless steel AISI 316
24. Needle Stainless steel AISI 316
25. Bushing Stainless steel AISI 316
26. Split pin Stainless steel A2

Test/Approvals

  • Seat: 1.1 x PN. Body: 1.5 x PN. 
  • WRAS approved materials

Standards

  • EN 1074-5
  • Face-to-face dimension according to EN 558, Series 1
  • Flange drilling to EN1092, PN10/16
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