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AVK PRESS. SUSTAINING/RELIEF CONTROL VALVE, PN10/16

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

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

AVK series 879 diaphragm actuated pressure sustaining control valves (PSV) automatically secure a minimum upstream pressure by reducing the flow if the upstream pressure drops below the setpoint.

Adjusting the setpoint above the usual operating pressure changes the function to pressure relief (PRV), where the valve automatically opens to dump excess upstream pressure if it exceeds the setpoint.

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

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 879/101X99-001
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		 Press. Range
bar		 D1
mm		 D2
mm		 D3
mm		 Dh
mm		 W
mm		 H3
mm		 L
mm		 Theoretical
weight/kg		 Notes
879-0050-10-14400119999 50 PN16 2-15 99 125 165 19 250 425 230 18
879-0050-10-144001199A0 50 PN16 2-15 99 125 165 19 250 425 230 18 Incl. position indicator
879-0065-10-14400119999 65 PN16 2-15 118 145 185 19 250 450 290 23
879-0065-10-144001199A0 65 PN16 2-15 118 145 185 19 250 450 290 23 Incl. position indicator
879-0080-10-14400119999 80 PN16 2-15 132 160 200 19 265 465 310 27
879-0080-10-144001199A0 80 PN16 2-15 132 160 200 19 265 465 310 27 Incl. position indicator
879-0100-10-14400119999 100 PN16 2-15 156 180 220 19 285 485 350 36
879-0100-10-144001199A0 100 PN16 2-15 156 180 220 19 285 485 350 36 Incl. position indicator
879-0150-10-14400119999 150 PN16 2-15 211 240 285 23 410 630 480 82
879-0150-10-144001199A0 150 PN16 2-15 211 240 285 23 410 630 480 82 Incl. position indicator
879-0200-10-04400119999 200 PN10 2-15 266 295 340 23 510 715 600 138
879-0200-10-044001199A0 200 PN10 2-15 266 295 340 23 510 774 600 138 Incl. position indicator
879-0200-10-14400119999 200 PN16 2-15 266 295 340 23 510 715 600 138
879-0200-10-144001199A0 200 PN16 2-15 266 295 340 23 510 774 600 138 Incl. position indicator
879-0250-10-04400119999 250 PN10 2-15 319 350 395 23 555 780 730 199
879-0250-10-044001199A0 250 PN10 2-15 319 350 395 23 555 854 730 199 Incl. position indicator
879-0250-10-14400119999 250 PN16 2-15 319 355 405 28 555 780 730 199
879-0250-10-144001199A0 250 PN16 2-15 319 355 405 28 555 854 730 199 Incl. position indicator
879-0300-10-04400119999 300 PN10 2-15 370 400 445 23 605 850 850 256
879-0300-10-044001199A0 300 PN10 2-15 370 400 445 23 605 923 850 256 Incl. position indicator
879-0300-10-14400119999 300 PN16 2-15 370 410 460 28 605 850 850 256
879-0300-10-144001199A0 300 PN16 2-15 370 410 460 28 605 923 850 256 Incl. position indicator
879-0350-10-04400119999 350 PN10 2-15 429 460 505 23 710 970 980 457
879-0350-10-044001199A0 350 PN10 2-15 429 460 505 23 710 1045 980 457 Incl. position indicator
879-0350-10-14400119999 350 PN16 2-15 429 470 520 28 710 970 980 457
879-0350-10-144001199A0 350 PN16 2-15 429 470 520 28 710 1045 980 457 Incl. position indicator
879-0400-10-04400119999 400 PN10 2-15 480 515 565 28 780 1030 1100 543
879-0400-10-044001199A0 400 PN10 2-15 480 515 565 28 780 1183 1100 543 Incl. position indicator
879-0400-10-14400119999 400 PN16 2-15 480 525 580 31 780 1030 1100 543
879-0400-10-144001199A0 400 PN16 2-15 480 525 580 31 780 1183 1100 543 Incl. position indicator
879-0450-10-04400119999 450 PN10 2-15 530 565 615 28 930 1210 1200 869
879-0450-10-044001199A0 450 PN10 2-15 530 565 615 28 930 1361 1200 869 Incl. position indicator
879-0450-10-14400119999 450 PN16 2-15 548 585 640 31 930 1210 1200 869
879-0450-10-144001199A0 450 PN16 2-15 548 585 640 31 930 1361 1200 869 Incl. position indicator
879-0500-10-04400119999 500 PN10 2-15 582 620 670 28 1020 1285 1250 1114
879-0500-10-044001199A0 500 PN10 2-15 582 620 670 28 1020 1435 1250 1114 Incl. position indicator
879-0500-10-14400119999 500 PN16 2-15 609 650 715 34 1020 1285 1250 1114
879-0500-10-144001199A0 500 PN16 2-15 609 650 715 34 1020 1435 1250 1114 Incl. position indicator
879-0600-10-04400119999 600 PN10 2-15 682 725 780 31 1090 1430 1450 1673
879-0600-10-044001199A0 600 PN10 2-15 682 725 780 31 1090 1584 1450 1673 Incl. position indicator
879-0600-10-14400119999 600 PN16 2-15 720 770 840 37 1090 1430 1450 1673
879-0600-10-144001199A0 600 PN16 2-15 720 770 840 37 1090 1584 1450 1673 Incl. position indicator
Enquiry
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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. Bolts 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. Pressure gauge Stainless steel
21. Ball valve Brass, Ni-plated
22. Needle valve Stainless steel
23. 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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