AVK NEEDLE VALVE, PN25

Gearbox for modulating duty, stainless steel trim, DN80-600

AVK headquater in Skovby Galten Denmark

Contact

AVK International A/S

Bizonvej 1, Skovby, 8464 Galten, Denmark

Needle valve PN25 for pressure and flow control applications, for water and neutral liquids to max. 70° C.

AVK series 872 needle valves are designed for throttling and control of pressure and flow at high flow rates and high differential pressures. The focus is on durability and reliability with the sturdy valve housing made of either stainless steel or ductile iron coated with fusion bonded epoxy. It controls with high precision and the high quality materials guarantee long service life with easy maintenance access. Gearbox construction with bronze worm wheel to ensure precise regulation kept throughout lifetime.

Variant 872/00-005
Connection: Flanged
Material: Ductile Iron
DN: DN80 - DN600
PN: PN 25

Features

  • Gearbox with bronze worm wheel for continuously modulating duty, minimum 1.2 million modulating steps

  • One-piece body construction
  • Symmetrical flow path ensures evenly distributed flow around the entire seat in any open position
  • Pressure balance in chamber inside for low operating torque
  • Internal body shape is optimized to give low head loss coefficient
  • 4 - 6 guide rails ensure very low vibration
  • Main seal mounted on the piston as opposed to on the seat preventing abrasion when fitted with anti cavitation trim
  • Gaskets in polyurethane for high resistance to abrasion
  • All iron parts coated with min. 250 μm fusion bonded epoxy, blue RAL 5005
  • Easy access for maintenance
  • Double O-rings sealed drive shaft
  • Stainless steel internal parts and fasteners
  • Functions:
    • Flow control
    • Pressure regulation
    • Pump start
    • Reservoir inlets
    • Discharge
    • Turbine by-pass
    • Air regulation

Reference nos. and dimensions:

AVK ref. no. DN
mm
Flange
drilling
A
mm
B
mm
D
mm
H3
mm
L
mm
W
mm
Theoretical
weight/kg
Enquiry
872-0080-00-70900300100 80 PN25 125 117 100 200 260 330 27
872-0100-00-70900300100 100 PN25 145 117 120 220 300 360 37
872-0150-00-70900300100 150 PN25 175 150 135 285 350 425 75
872-0200-00-70100300000 200 PN25 220 150 150 425 400 505 110
872-0250-00-70100300000 250 PN25 260 165 165 475 450 580 155
872-0300-00-70100300000 300 PN25 305 185 185 535 500 660 235
872-0350-00-70100300000 350 PN25 350 205 205 595 550 770 325
872-0400-00-70100300000 400 PN25 385 300 235 665 600 835 410
872-0500-00-70100300000 500 PN25 445 300 245 785 700 965 530
872-0600-00-70100300000 600 PN25 505 300 280 925 800 1090 880

Downloads

Datasheets
Installation, Operation & Maintenance

Components

1. Shaft Stainless steel 1.4028
2. Screw Stainless steel A2-70
3. Key Stainless steel
4. Cap Alu-bronze CC333G
5. O-ring NBR rubber
6. Bush Alu-bronze CC333G
7. Bush Alu-bronze CC333G
8. O-ring NBR rubber
9. Plug Plastic
10. Cap Stainless steel 1.4028
11. O-ring NBR rubber
12. Body Ductile iron GJS-500-7 (GGG-50)
13. Crank Ductile iron GJS-500-7 (GGG-50)
14. Pin Stainless steel 1.4028
15. Split pin Stainless steel 1.4401
16. Bush Alu-bronze CC333G
17. Guide Brass CW617N
18. Piston tube Stainless steel 1.4301
19. Eye bolt Steel, zinc coated
20. Gasket Polyurethane
21. O-ring NBR rubber
22. Gasket Polyurethane
23. Piston flange Stainless steel 1.4301
24. Fixing plate Stainless steel 1.4301
25. Bush Alu-bronze CC333G
26. Connection rod Stainless steel 1.4028
27. Pin Stainless steel 1.4028
28. Body seal ring Stainless steel 1.4301
29. Key Stainless steel
30. Socket screw Stainless steel A2-70
31. Bolt, socket head Stainless steel A2-70
32. Guide Brass CW617N
33. Fixing gasket ring Stainless steel 1.4301
34. Bolt, hexagon head Stainless steel A2-70
35. Bolt, hexagon head Stainless steel A2-70
36. Bolt, socket head Stainless steel A2-70
37. Gearbox

Test/Approvals

  • Hydraulic test according to EN 1074-1 and 5/ EN12266, seat: 1.1 x PN (in bar), body 1.5 x PN (in bar)

Standards

  • Designed according to EN 1074 - 5
  • Face-to-face dimension according to EN 558 Table 2 Basic Series 15
  • Standard flange drilling to EN1092-2 (ISO 7005-2), PN25
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