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AVK NEEDLE VALVE, PN25

DI/SS body, SS internals, A2 bolts, gearbox cont. mod.

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AVK Valves Korea Co., Ltd.

Suite 1409, 14/F, CENTUM LEADERS MARK, 17, APEC-ro, Haeundae-gu, Busan 48060, Korea

Needle valve for continuous pressure or flow control of water 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: DN700
PN: PN 25

Features

  • 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
  • Bushings in high strength alu-bronze
  • Gaskets in polyurethane for high resistance to abrasion
  • Gearbox with bronze wormgear, suitable for continuous modulating operation
  • Internal parts and fasteners in stainless steel
  • All iron parts coated with min. 250µm, blue RAL5005 epoxy - fusion bonded (FBE)
  • DN80-150 bodies in uncoated stainless steel
  • Double O-rings sealed drive shaft
  • Easy access for maintenance
  • Functions: Flow control, Pressure regulation, Pump start, Reservoir inlets, Discharge, Turbine by-pass, Air regulation

Downloads

Datasheet
Certificate(s)
Installation, operation and maintenance manuals
Video
AVK Needle Valve.mp4

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
872-0700-00-70100300000 700 PN25 565 380 315 1045 900 1185 1100
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
  • ISO 14001 certified - SAI Global Environment
  • ISO 9001 certified - SAI Global Quality
  • Approved according to WRAS Certificate No. 2301010, cold water
  • Approved according to SABESP Brazil

Standards

  • EN 1074-5
  • Face-to-face dimension according to EN 558, Series 15
  • Flange drilling EN1092, PN25
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