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AVK SURGE ANTICIP./RELIEF CONTROL VALVE, PN10/16

Full bore, AISI304/DI trim, AISI304 pilot, brass fittings/accs., EPDM/WRAS rubber

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

AVK series 879 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 control knob on the pilots.

Both full bore and reduced bore versions are available with the full bore having full capacity and the reduced bore having increased precision and smooth regulation at low flow rates.

Variant 879/108X99-001
Connection: Flanged
Material: Ductile iron
DN: DN50 - DN600
PN: PN10/16

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 coated with fusion bonded epoxy, 300µm, GSK approved, RAL 5017, according to DIN 3476 and WRAS-DVGW/W270/UBA
  • All rubber parts approved for drinking water
  • All non-coated internals made of stainless steel or bronze
  • Seat and pilot in stainless steel AISI 304
  • A needle valve fitted between the upstream side and 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 allowing for service of the pilot valve
  • Fittings, pipes and accessories in Ni-plated brass

Downloads

Datasheet
Related Datasheets
Tender Text
Certificate(s)
Installation, operation and maintenance manuals

Reference nos. and dimensions:

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Reference no. DN
mm		 Flange
drilling		 D1
mm		 D2
mm		 D3
mm		 Dh
mm		 W
mm		 H3
mm		 L
mm		 Hi press.
range/bar		 Lo press.
range/bar		 Theoretical
weight/kg
879-0050-10-14400849999 50 PN16 99 125 165 19 310 436 230 2-15 1-5 34
879-0065-10-14400849999 65 PN16 118 145 185 19 325 465 290 2-15 1-5 39
879-0080-10-14400849999 80 PN16 132 160 200 19 340 480 310 2-15 1-5 43
879-0100-10-14400849999 100 PN16 156 180 220 19 360 500 350 2-15 1-5 52
879-0150-10-14400849999 150 PN16 211 240 285 23 415 635 480 2-15 1-5 98
879-0200-10-04400849999 200 PN10 266 295 340 23 470 690 600 2-15 1-5 154
879-0200-10-14400849999 200 PN16 266 295 340 23 470 690 600 2-15 1-5 154
879-0250-10-04400849999 250 PN10 319 350 395 23 585 770 730 2-15 1-5 215
879-0250-10-14400849999 250 PN16 319 355 405 28 585 770 730 2-15 1-5 215
879-0300-10-04400849999 300 PN10 370 400 445 23 640 840 850 2-15 1-5 272
879-0300-10-14400849999 300 PN16 370 410 460 28 640 840 850 2-15 1-5 272
879-0350-10-04400849999 350 PN10 429 460 505 23 700 960 980 2-15 1-5 473
879-0350-10-14400849999 350 PN16 429 470 520 28 700 960 980 2-15 1-5 473
879-0400-10-04400849999 400 PN10 480 515 565 28 760 1020 1100 2-15 1-5 559
879-0400-10-14400849999 400 PN16 480 525 580 31 760 1020 1100 2-15 1-5 559
879-0450-10-04400849999 450 PN10 530 565 615 28 820 1200 1200 2-15 1-5 885
879-0450-10-14400849999 450 PN16 548 585 640 31 820 1200 1200 2-15 1-5 885
879-0500-10-04400849999 500 PN10 582 620 670 28 895 1275 1250 2-15 1-5 1130
879-0500-10-14400849999 500 PN16 609 650 715 34 895 1275 1250 2-15 1-5 1130
879-0600-10-04400849999 600 PN10 682 725 780 31 1020 1420 1450 2-15 1-5 1688
879-0600-10-14400849999 600 PN16 720 770 840 37 1020 1420 1450 2-15 1-5 1688
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Components

1. Body Ductile iron EN-GJS-500-7
2. O-ring EPDM rubber
3. O-ring EPDM rubber
4. Plug sealing EPDM rubber
5. Hex nut Stainless steel A2
6. Washer Stainless steel AISI 304
7. Bolt Stainless steel A2
8. Diaphragm EPDM rubber
9. Spring Stainless steel AISI 304
10. Flat seal EPDM rubber
11. Flat seal EPDM rubber
12. Cover Ductile iron EN-GJS-500-7
13. Hex nut Stainless steel A2
14. Diaphragm support Ductile iron EN-GJS-500-7
15. Obturator Ductile iron EN-GJS-500-7
16. Regulating plug Stainless steel AISI 304
17. Seat Stainless steel AISI 304
18. Stem Stainless steel AISI 304
19. Pilot valve Stainless steel
20. Pilot valve Stainless steel
21. Pressure gauge Stainless steel
22. Ball valve Brass, Ni-plated
23. Needle valve Stainless steel
24. Y-strainer / Orifice Brass + SS 316

Test/Approvals

  • Hydraulic test: 1.5 x PN |
  • Tested according to EN 12266-1
  • Approved according to ACS-France
  • Approved according to WRAS Certificate 2010005, max 50°C

Standards

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