AVK PRESSURE SUSTAINING/RELIEF CONTROL VALVE, PN16

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

Luka Helijic AVK

Luka Heljic

Business Development Manager - Air & Control Valves

Control valve, pressure sustaining/relief, 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 comparred to reduced bore. For further info on red bore see separate datasheet 879/001X99-001.

AVK series 879 diaphragm actuated pressure sustaining control valves (PSV) automatically maintain a constant upstream pressure regardless of flow demand or changes in outlet 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 handwheel on the pilot.

Variant 879/101X99-001
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, 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 internals made of stainless steel or bronze
  • 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
  • Available with Position Indicator upon request

Reference nos. and dimensions:

Ref. no. DN
mm
Flange
drillling
Pilotrange
bar
D1
mm
D2
mm
D3
mm
DH
mm
W
mm
H3
mm
L
mm
Theoretical
weight / kg
Enquiry
879-0050-10-14400119999 50 PN10/16 2-15 99 125 165 19 230 430 230 18
879-0065-10-14400119999 65 PN10/16 2-15 118 145 185 19 235 460 290 23
879-0080-10-14400119999 80 PN10/16 2-15 132 160 200 19 250 475 310 27
879-0100-10-14400119999 100 PN10/16 2-15 156 180 220 19 270 495 350 36
879-0150-10-14400119999 150 PN10/16 2-15 211 240 285 23 325 630 480 82
879-0200-10-04400119999 200 PN10 2-15 266 295 340 23 380 740 600 138
879-0200-10-14400119999 200 PN16 2-15 266 295 340 23 380 740 600 138
879-0250-10-04400119999 250 PN10 2-15 319 350 395 23 445 820 730 199
879-0250-10-14400119999 250 PN16 2-15 319 350 395 23 445 820 730 199
879-0300-10-04400119999 300 PN10 2-15 370 400 445 23 500 890 850 256
879-0300-10-14400119999 300 PN16 2-15 370 400 445 23 500 890 850 256
879-0350-10-04400119999 350 PN10 2-15 429 460 505 23 560 1010 980 457
879-0350-10-14400119999 350 PN16 2-15 429 460 505 23 560 1010 980 457
879-0400-10-04400119999 400 PN10 2-15 480 515 565 28 620 1075 1100 543
879-0400-10-14400119999 400 PN16 2-15 480 515 565 28 620 1075 1100 543
879-0450-10-04400119999 450 PN10 2-15 530 565 615 28 680 1250 1200 869
879-0450-10-14400119999 450 PN16 2-15 530 565 615 28 680 1250 1200 869
879-0500-10-04400119999 500 PN10 2-15 582 620 670 28 755 1325 1250 1114
879-0500-10-14400119999 500 PN16 2-15 582 620 670 28 755 1325 1250 1114
879-0600-10-04400119999 600 PN10 2-15 682 780 780 31 880 1475 1450 1673
879-0600-10-14400119999 600 PN16 2-15 682 780 780 31 880 1475 1450 1673

Downloads

Datasheets
Certificate(s)
Installation, Operation & Maintenance

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

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

     

  • WRAS approved Materials

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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