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AVK CONTROL VALVE, CONSTANT FLOW, PN10/16

Reduced bore, 304/DI trim, 300µm blue EP

Peter Tan

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Peter Tan

SALES MANAGER East Coast Region

Constant flow control valve, reduced bore, for water and neutral liquids to max. 70° C

AVK series 859/2X diaphragm actuated flow control valves (CFV) automatically secure a maximum flow rate by throttling the valve if the flow exceeds the setpoint.

Feed back to the pilot is by means of the pressure drop across an orifice at the outlet.

The replaceable orifice makes it possible to regulate within a large range of flows and still keep the 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 859/202X-001
Connection: Flanged
Material: Ductile iron
DN: DN65 - DN600
PN: PN 10/16

Features

Main control valve

  • Lifted seat to avoid damage due to cavitation
  • Geometry of regulating plug provides high ratio of travel Kv, resulting in optimal control performance
  • Non-symmetric axial position of rubber diaphragm results in less stretch/stress near closed position
  • All non-coated internals made of stainless steel AISI 304
  • Body and bonnet of ductile iron with fusion bonded epoxy, 300micron, GSK approved, RAL 5017, according to DIN 3476 and WRAS-DVGW/W270/UBA.
  • All rubber components with multiple approvals (EN 681-1, KTW, W270, ACS, WRAS)

Pilot system

  • Modular and compact design for easy application change
  • Integral Valve, mainly used for isolating the control chamber, fixing position of main valve, in case of servicing the pilot circuit. The integral Valve, can also be used, adjusting main valve reaction time
  • Main components made of stainless steel AISI 304:
    • Distribution block:
      -  Connecting main control valve to pilot system
      -  Control orifice
    • Filter:
      -  High capacity, easy to flush with possibility of back flushing
      -  Mesh 100, high performance wire screen type
    • Hydraulic control block:
      -  Includes balance pilot, providing a more stable pressure setpoint
      -  Can be set up for different applications using single-function or multi-function modules

Downloads

Datasheet

Reference nos. and dimensions:

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AVK ref. no. Gross Price
MYR		 DN
mm		 Flange
drilling		 Flow range
m3/h		 L
mm		 W1
mm		 W2
mm		 H3
mm		 Theoretical
weight/kg
859-0065-20-1640021 10,870 65 PN10/16 8 - 20 305 131 161 356 17
859-0080-20-1640021 11,420 80 PN10/16 14 - 36 325 131 161 375 21
859-0100-20-1640021 12,796 100 PN10/16 14 - 34 365 131 161 394 26
859-0125-20-1640021 13,993 125 PN10/16 21 - 52 415 131 161 413 31
859-0150-20-1640021 15,795 150 PN10/16 50 - 150 495 139 161 451 73
859-0200-20-0640021 price on request 200 PN10 115 - 290 615 202 202 542 87
859-0200-20-1640021 23,317 200 PN16 115 - 290 615 202 202 542 87
859-0250-20-0640021 price on request 250 PN10 140 - 350 745 252 252 659 144
859-0250-20-1640021 31,496 250 PN16 140 - 350 745 252 252 659 144
859-0300-20-0640021 price on request 300 PN10 175 - 430 865 275 275 736 203
859-0300-20-1640021 39,778 300 PN16 175 - 430 865 275 275 736 203
859-0350-20-0640021 price on request 350 PN10 225 - 555 995 302 302 796 325
859-0350-20-1640021 56,402 350 PN16 225 - 555 995 302 302 796 325
859-0400-20-0640021 price on request 400 PN10 370 - 905 1115 355 355 920 505
859-0400-20-1640021 73,838 400 PN16 370 - 905 1115 355 355 920 505
859-0450-20-0640021 price on request 450 PN10 115 - 1090 1215 398 398 986 645
859-0450-20-1640021 85,324 450 PN16 445 - 1090 1215 398 398 986 645
859-0500-20-0640021 price on request 500 PN10 530 - 1290 1265 465 465 1163 947
859-0500-20-1640021 109,240 500 PN16 530 - 1290 1265 465 465 1163 947
859-0600-20-0640021 price on request 600 PN10 710 - 1735 1465 509 509 1272 1292
859-0600-20-1640021 136,311 600 PN16 710 - 1735 1465 509 509 1272 1292
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Components

1. O-ring EPDM rubber
2. Plug sealing EPDM rubber
3. Washer Stainless steel A2
4. Bolt Stainless steel A2
5. Diaphragm EPDM rubber
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 disc Stainless steel AISI 304
15. Seat Stainless steel AISI 304
16. Body Ductile iron GJS-500-7 (GGG-50)
17. Pilot valve Stainless steel AISI 304
18. Mechanical air-vent Stainless steel AISI 304
19. Filter Stainless steel AISI 304
20. Gasket EPDM rubber
21. Body Stainless steel AISI 304
22. Plug Stainless steel AISI 304
23. Insert Stainless steel AISI 304
24. Needle Stainless steel AISI 304
25. Bushing Stainless steel AISI 304
26. Split pin Stainless steel A2
27. Gasket EPDM rubber
28. Orifice plate Stainless steel AISI 304
29. Orifice plate flange 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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