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AVK PRESSURE REDUCING CONTROL VALVE, PN16

Full bore, EN558/s.1, AISI304 fittings, EPDM/WRAS rubber, 300µm blue EP GSK coating

Anthony Whittam AVK UK Network Water Specialist

Anthony Whittam

Network Water Specialist

Control valve, pressure reducing, for drinking water or other neutral liquids to max. 70°C. The series offer two ranges, reduced bore and full bore. The full bore has increased capacity compared to the reduced bore. For further info on the reduced bore see separate datasheet 879/000X99-001.

AVK series 879 diaphragm actuated pressure reducing control valves (PRV) automatically maintain a constant outlet pressure regardless of flow demand or changes in inlet pressure.

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 879/100X99-001
Connection: Flanged
Material: Ductile Iron
DN: DN50 - DN600
PN: PN 10/16

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

Certificate(s)
Datasheet
Installation, Operation & Maintenance
Related Datasheets
Tender Text

Reference nos. and dimensions:

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Ref. no. DN
mm		 Flange
drillling		 Pilot range
bar		 D1
mm		 D2
mm		 D3
mm		 Dh
mm		 H3
mm		 L
mm		 W
mm		 Theoretical
weight / kg
879-0050-10-14400059999 50 PN16 2-15 99 125 165 19 370 230 266 17
879-0065-10-14400059999 65 PN16 2-15 118 145 185 19 395 290 285 22
879-0080-10-14400059999 80 PN16 2-15 132 160 200 19 410 310 300 26
879-0100-10-14400059999 100 PN16 2-15 156 180 220 19 430 350 320 35
879-0200-10-04400059999 200 PN10 2-15 266 295 340 23 690 600 420 137
879-0200-10-14400059999 200 PN16 2-15 266 295 340 23 690 600 420 137
879-0250-10-04400059999 250 PN10 2-15 319 350 395 23 770 730 485 198
879-0250-10-14400059999 250 PN16 2-15 319 355 405 28 770 730 485 198
879-0300-10-04400059999 300 PN10 2-15 370 400 445 23 835 850 540 255
879-0300-10-14400059999 300 PN16 2-15 370 410 460 28 835 850 540 255
879-0350-10-04400059999 350 PN10 2-15 429 460 505 23 960 980 600 456
879-0350-10-14400059999 350 PN16 2-15 429 470 520 28 960 980 600 456
879-0400-10-04400059999 400 PN10 2-15 480 515 565 28 1020 1100 660 542
879-0400-10-14400059999 400 PN16 2-15 480 525 580 31 1020 1100 660 542
879-0450-10-04400059999 450 PN10 2-15 530 565 615 28 1200 1200 720 868
879-0450-10-14400059999 450 PN16 2-15 548 585 640 31 1200 1200 720 868
879-0500-10-04400059999 500 PN10 2-15 582 620 670 28 1270 1250 795 1113
879-0500-10-14400059999 500 PN16 2-15 609 650 715 34 1270 1250 795 1113
879-0600-10-04400059999 600 PN10 2-15 682 725 780 31 1420 1450 920 1672
879-0600-10-14400059999 600 PN16 2-15 720 770 840 37 1420 1450 920 1672
Enquiry
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Components

1. Body Ductile iron GJS-500-7
2. O-ring EPDM
3. O-ring EPDM
4. Plug sealing EPDM
5. Hex Nut Stainless steel A2
6. Washer Stainless steel 304
7. Bolts Stainless steel A2
8. Diaphragm EPDM
9. Spring Stainless steel 304
10. Flat Seal EPDM
11. Flat Seal EPDM
12. Cover Ductile iron GJS-500-7
13. Hex Nut Stainless steel A2
14. Diaphragm Support Ductile iron GJS-500-7
15. Obturator Ductile iron GJS-500-7
16. Regulating Plug Stainless steel 304
17. Seat Stainless steel 304
18. Stem Stainless steel 304
19. Pilot valve Stainless steel
20. Pressure gauge Stainless steel
21. Ball valve
22. Needle valve Stainless steel
23.

Test/Approvals

  • Tested according to EN12266-1. Seat: 1.1 x PN (in Bar), Body: 1.5 x PN (in Bar)

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  • Hydraulic test: 1.5 x PN

Standards

  • Designed according to EN 1074 - 5
  • Face to face according to EN558 Table 2 Basic Series 1
  • Standard flange drilling to EN1092 (ISO 7005-2), PN 10/16
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