AVK NEEDLE VALVE, PN40

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

Martin Børsting, Product Manager, AVK International

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Martin Børsting

Team Leader and Product Manager, Control Valves

Needle valve PN40 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 872/00-006
Connection: Flanged
Material: Ductile Iron
DN: DN80 - DN600
PN: PN 40

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

Downloads

Datasheet
Certificate(s)
Installation, Operation & Maintenance

Reference nos. and dimensions:

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AVK ref. no. DN
mm
Flange
drilling
A
mm
B
mm
D
mm
H3
mm
L
mm
W
mm
Theoretical
weight/kg
872-0080-00-60900300100 80 PN40 125 117 100 230 260 330 31
872-0100-00-60900300100 100 PN40 145 117 120 235 300 370 42
872-0150-00-60900300100 150 PN40 175 150 135 300 350 435 75
872-0200-00-60100300000 200 PN40 220 150 150 425 400 510 122
872-0250-00-60100300000 250 PN40 260 155 165 505 450 580 165
872-0300-00-60100300000 300 PN40 305 155 185 585 500 695 305
872-0400-00-60100300000 400 PN40 385 305 235 650 600 845 435
872-0500-00-60100300000 500 PN40 445 305 245 760 700 960 700
872-0600-00-60100300000 600 PN40 505 510 280 925 800 1080 950
Enquiry
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Components

1. Shaft Stainless steel 1.4028
2. Screw Stainless steel A2-70
3. Key Stainless steel
4. Ring cap Alu-bronze CC333G
5. O-ring EPDM rubber
6. Bush Alu-bronze CC333G
7. Bush Alu-bronze CC333G
8. O-ring EPDM rubber
9. Plug Plastic
10. Ogive Stainless steel 1.4028
11. O-ring EPDM 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 1.4301
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 EPDM 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, socket 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 2 / EN 12266
  • Hydraulic test according to EN 1074-1 and 5/ EN12266, seat: 1.1 x PN (in bar), body 1.5 x PN (in bar)
  • Approved according to WRAS Certificate No. 2301010
  • Approved according to SABESP Brazil

Standards

  • Designed according to EN 1074 - 5
  • Face-to-face dimension according to EN 558 Table 2 Basic Series 15
  • Flange drilling EN1092, PN40
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