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Diaphragm Operated Control Valve, for Constant Flow Applications (CFV), PN10/16

Reduced bore, WRAS approved materials, AISI304 pipes and fittings

Diaphragm Operated Control Valve for water to max. 70° C

AVK series 859 diaphragm actuated flow control valves (CFV) automatically regulates the flow not to exceed the pilot setting, regardless of changes in inlet or outlet pressure.

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.

Variant 859/002X-002
Connection: Flanged
Material: Ductile iron
DN: DN65 - DN300
PN: PN10/16

Features

  • Main control valve
    • Lifted seat, to avoid damage due to cavitation; High Kv value, at fully open position.
    • Geometry of regulating disc, provides high ratio of travel- Kv, resulting in optimal control performance.
    • Non symmetric axial position of rubber diaphragm, getting less stretch/stress, near closed position.
    • All, non coated internals, made of AISI316.
    • Body and bonnet of ductile iron with fusion bonded epoxy, 300micron, RAL 5017, according to WRAS-DVGW/W270/UBA.
    • All rubber components with multiple approvals (EN 681-1, KTW, W270, ACS, WRAS)
  • Pilot system
    • Modular and compact design, easy for application change.
    • Main components: Distribution blocker, filter and hydraulic control block.
      • Distribution block, AISI 316.
        • Connecting main control valve to pilot system.
        • Easy adjustment of regulating speed.
        • Control orifice.
      • Filter, AISI 316.
        • High capacity, long life, easy to flush, back flushing possible.
        • Mesh 100, high performance wire screen type.
      • Hydraulic control block, AISI 316.
        • Includes balanced pilot valve, providing more stable pressure set.
        • Can be set up for different applications, using specific: Single Function Modules (type SFM) or Multi Function Modules (type MFM).

Reference nos. and dimensions:

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Reference no. DN
mm		 Flange
drilling		 Flow range
m3/h		 L
mm		 W1
mm		 W2
mm		 H3
mm		 Theoretical
weight/kg
859-0065-00-1240020 65 PN10/16 5 - 15 305 131 161 356 17
859-0065-00-1240021 65 PN10/16 8 - 20 305 131 161 356 17
859-0065-00-1240022 65 PN10/16 17 - 42 305 131 161 356 17
859-0080-00-1240020 80 PN10/16 7 - 18 325 131 161 375 21
859-0080-00-1240021 80 PN10/16 14 - 36 325 131 161 375 21
859-0080-00-1240022 80 PN10/16 27 - 65 325 131 161 375 21
859-0100-00-1240020 100 PN10/16 7 - 18 365 131 161 394 26
859-0100-00-1240021 100 PN10/16 14 - 34 365 131 161 394 26
859-0100-00-1240022 100 PN10/16 23 - 57 365 131 161 394 26
859-0100-00-1240023 100 PN10/16 47 - 113 365 131 161 394 26
859-0125-00-1240020 125 PN10/16 13 - 32 415 131 161 413 31
859-0125-00-1240021 125 PN10/16 21 - 52 415 131 161 413 31
859-0125-00-1240022 125 PN10/16 32 - 80 415 131 161 413 31
859-0125-00-1240023 125 PN10/16 48 - 118 415 131 161 413 31
859-0150-00-1240020 150 PN10/16 30 - 75 495 139 161 451 73
859-0150-00-1240021 150 PN10/16 50 - 150 495 139 161 451 73
859-0150-00-1240022 150 PN10/16 80 - 200 495 139 161 451 73
859-0150-00-1240023 150 PN10/16 115 - 254 495 139 161 451 73
859-0200-00-0240020 200 PN10 50 - 130 615 202 202 542 87
859-0200-00-0240021 200 PN10 115 - 290 615 202 202 542 87
859-0200-00-0240022 200 PN10 150 - 339 615 202 202 542 87
859-0200-00-0240023 200 PN10 190 - 339 615 202 202 542 87
859-0200-00-1240020 200 PN16 50 - 130 615 202 202 542 87
859-0200-00-1240021 200 PN16 115 - 290 615 202 202 542 87
859-0200-00-1240022 200 PN16 150 - 365 615 202 202 542 87
859-0200-00-1240023 200 PN16 190 - 452 615 202 202 542 87
859-0250-00-0240020 250 PN10 85 - 200 745 252 252 659 144
859-0250-00-0240021 250 PN10 140 - 350 745 252 252 659 144
859-0250-00-0240022 250 PN10 230 - 530 745 252 252 659 144
859-0250-00-0240023 250 PN10 280 - 530 745 252 252 659 144
859-0250-00-1240020 250 PN16 85 - 200 745 252 252 659 144
859-0250-00-1240021 250 PN16 140 - 350 745 252 252 659 144
859-0250-00-1240022 250 PN16 230 - 570 745 252 252 659 144
859-0250-00-1240023 250 PN16 280 - 690 745 252 252 659 144
859-0300-00-0240020 300 PN10 120 - 300 865 275 275 736 203
859-0300-00-0240021 300 PN10 175 - 430 865 275 275 736 203
859-0300-00-0240022 300 PN10 340 - 762 865 275 275 736 203
859-0300-00-0240023 300 PN10 460 - 762 865 275 275 736 203
859-0300-00-1240020 300 PN16 120 - 300 865 275 275 736 203
859-0300-00-1240021 300 PN16 175 - 430 865 275 275 736 203
859-0300-00-1240022 300 PN16 340 - 825 865 275 275 736 203
859-0300-00-1240023 300 PN16 460 - 1017 865 275 275 736 203
Enquiry
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Components

1. O-ring EPDM rubber
2. O-ring EPDM rubber
3. Hex nut Stainless steel A4, anti friction
4. Disc seal EPDM rubber
5. Washer Stainless steel A4
6. Bolt Stainless steel A4
7. Diaphragm EPDM rubber
8. O-ring EPDM rubber
9. Hex nut Stainless steel A4, anti friction
10. Flat seal EPDM rubber
11. Flat seal EPDM rubber
12. Stem Stainless steel AISI 316
13. Stem guide Stainless steel AISI 316
14. Bonnet Ductile iron GJS-500-7 (GGG-50)
15. Spring Stainless steel AISI 316
16. Diaphragm support Stainless steel AISI 316
17. Distance pipe Stainless steel AISI 316
18. Disc retainer Stainless steel AISI 316
19. Regulating plug Stainless steel AISI 316
20. Seat Stainless steel AISI 316
21. Body Ductile iron GJS-500-7 (GGG-50)
22. Flat seal EPDM rubber
23. O-ring NBR rubber
24. Gasket EPDM rubber
25. Bushing Stainless steel AISI 316
26. Needle close control Stainless steel AISI 316
27. Body Stainless steel AISI 316
28. O-ring EPDM rubber
29. Insert Stainless steel AISI 316
30. O-ring EPDM rubber
31. Needle open control Stainless steel AISI 316
32. O-ring EPDM rubber
33. O-ring EPDM rubber
34. Body Stainless steel AISI 316
35. O-ring EPDM rubber
36. Spring Stainless steel AISI 316
37. Ball Stainless steel AISI 316
38. Seat Stainless steel AISI 316
39. Bushing Stainless steel AISI 316
40. Pilot valve Stainless steel AISI 316
41. Mechanical air-vent Stainless steel AISI 316
42. Bolt Stainless steel A4
43. Filter Stainless steel AISI 316
44. Orifice plate flange Stainless steel AISI 316
45. Gasket EPDM rubber
46. Orifice plate Stainless steel AISI 304

Test/Approvals

  • Seat: 1.1 x PN. Body: 1.5 x PN.  |
  • Test of duty point, if specified (Optional).

Standards

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