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AVK CONTROL VALVE, SURGE ANTICIPATING/RELIEF, PN10/16

Reduced bore, SS-304/DI trim

Contact

Pham Trung

Technical Manager

Control valve, surge anticipating/relief, for drinking water or other neutral liquids to max. 70°C

AVK series 869 diaphragm actuated surge anticipation and relief control valves constantly monitor the system pressure and protect against pressure surges.

The pressure relief opens the valve to dump excess pressure when it exceeds the high setpoint.

The surge anticipation senses the rapid pressure drop from a suddenly failed pump that is often followed by a rapid and dangerous high-pressure surge. The drop below the low setpoint opens the valve, this time to make it ready to dissipate the anticipated pressure surge.

A replaceable spring inside the pilot makes it possible to operate in different pressure ranges and still keep the high precision. Precise setting and easy adjustment on a knob on the pilots.

Variant 869/2017-001
Connection: Flanged
Material: Ductile iron
DN: DN65 - DN600
PN: PN 16

Features

  • The lifted seat design controls the flow around the plug so that in case of cavitation this happens with minimal damage away from plug and seat
  • 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 with 300 µm coating of blue RAL 5017 fusion bonded epoxy to DIN 3476 and applied in a process approved by GSK and WRAS-DVGW/W270/UBA
  • All rubber parts approved for drinking water
  • All non-coated internals made of stainless steel or bronze
  • Pilot, seat, fittings and piping in stainless steel AISI304
  • A needle valve between upstream and control chamber allows for adjustment of the regulation reaction time
  • Closing the needle valve isolates the control chamber and fixes the main valve position allowing for service of the pilot
  • Integrated lifting eyes on body from DN150 for ease of handling

Downloads

Datasheet
Tender Text
Installation, operation and maintenance manuals

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		 L2
mm		 W1
mm		 W2
mm		 H3
mm		 Theoretical
weight/kg
869-0065-20-1340015 65 PN10/16 0.6 - 6 5 - 10 400 290 94 236 509 22
869-0080-20-1340015 80 PN10/16 0.6 - 6 5 - 10 420 310 108 244 526 26
869-0100-20-1340015 100 PN10/16 0.6 - 6 5 - 10 450 350 117 254 542 30
869-0125-20-1340015 125 PN10/16 0.6 - 6 5 - 10 475 400 125 266 561 35
869-0150-20-1340015 150 PN10/16 0.6 - 6 5 - 10 575 480 143 281 603 48
869-0200-20-0340015 200 PN10 0.6 - 6 5 - 10 660 600 203 306 693 98
869-0200-20-1340015 200 PN16 0.6 - 6 5 - 10 660 600 203 306 693 98
869-0250-20-0340015 250 PN10 0.6 - 6 5 - 10 790 730 254 331 797 159
869-0250-20-1340015 250 PN16 0.6 - 6 5 - 10 790 730 254 331 797 159
869-0300-20-0340015 300 PN10 0.6 - 6 5 - 10 850 850 277 356 881 223
869-0300-20-1340015 300 PN16 0.6 - 6 5 - 10 850 850 277 356 881 223
869-0350-20-0340015 350 PN10 0.6 - 6 5 - 10 980 980 302 387 944 326
869-0350-20-1340015 350 PN16 0.6 - 6 5 - 10 980 980 302 387 944 326
869-0400-20-0340015 400 PN10 0.6 - 6 5 - 10 1100 1100 355 412 1063 498
869-0400-20-1340015 400 PN16 0.6 - 6 5 - 10 1100 1100 355 412 1063 498
869-0450-20-0340015 450 PN10 0.6 - 6 5 - 10 1200 1200 398 439 1130 636
869-0450-20-1340015 450 PN16 0.6 - 6 5 - 10 1200 1200 398 439 1130 636
869-0500-20-0340015 500 PN10 0.6 - 6 5 - 10 1250 1250 465 465 1249 938
869-0500-20-1340015 500 PN16 0.6 - 6 5 - 10 1250 1250 465 465 1249 938
869-0600-20-0340015 600 PN10 0.6 - 6 5 - 10 1450 1450 509 522 1362 1282
869-0600-20-1340015 600 PN16 0.6 - 6 5 - 10 1450 1450 509 522 1362 1282
Enquiry
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Components

1. O-ring EPDM rubber
2. Plug sealing EPDM rubber
3. Washer Stainless steel A2
4. Diaphragm EPDM rubber
5. Bolt Stainless steel A2
6. Nut Stainless steel A2
7. Stem Stainless steel AISI 431
8. Stem guide Stainless steel AISI 304
9. Bonnet Ductile iron GJS-500-7 (GGG-50)
10. Spring Stainless steel AISI 304
11. Washer Bronze CC499K
12. Diaphragm support Ductile iron GJS-500-7 (GGG-50)
13. Disc retainer Ductile iron GJS-500-7 (GGG-50)
14. Regulating plug Stainless steel AISI 304
15. Seat Stainless steel AISI 304
16. Body Ductile iron GJS-500-7 (GGG-50)
17. Filter Stainless steel AISI 304
18. Plug Stainless steel AISI 304
19. Pilot valve Stainless steel AISI 304
20. Needle valve Stainless steel AISI 304
21. Control orifice Stainless steel AISI 304

Test/Approvals

  • Hydraulic test according to EN 1074-1 and 5/ EN12266
  • 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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