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AVK PRESSURE REDUCING CONTROL VALVE, PN10/16

Reduced bore, EN558/s, AISI304 fittings, EPDM/WRAS rubber, 300µm blue EP

Glenfield Invicta Kilmarnock Office

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Control valve, pressure reducing, for drinking water or other neutral liquids to max. 70°C. The series offer two ranges, red bore and full bore. The full bore has increased capacity compared to the reduced bore. For further info on full bore see separate datasheet 879/100X99-001.

AVK series 879 diaphragm actuated pressure reducing control valves (PRV) automatically maintain a constant outlet pressure regardless of flow demand or changes in inlet pressure.

A replaceable spring inside the pilot makes it possible to operate in different pressure ranges and still keep the high 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 879/000X99-004
Connection: Flanged
Material: Ductile Iron
PN: PN 10/16

Features

  • The lifted seat design controls the flow around the plug so that in case of cavitation this happens with minimal damage away from plug and seat
  • The parabolic shape of the plug creates a smooth regulating characteristic with low gain around the near-closed positions improving control performance at low flow
  • Non-symmetric axial position of rubber diaphragm results in low stretch stress when closed
  • Body and bonnet of ductile iron coated with fusion bonded epoxy, 300µm, GSK approved, RAL 5017, according to DIN 3476 and WRAS-DVGW/W270/UBA
  • All rubber parts approved for drinking water
  • All non-coated internals made of stainless steel or bronze
  • Seat and pilot in stainless steel AISI 304
  • A needle valve fitted between the upstream side and the control chamber allows for adjustment of the regulation reaction time
  • Closing the needle valve isolates the control chamber and fixes the position of the main valve allowing for service of the pilot valve
  • Fittings, pipes and accessories in Ni-plated brass

Components

1. Body Ductile iron GJS-500-7
2. O-ring EPDM
3. O-ring EPDM
4. Plug sealing EPDM
5. Nut Stainless steel A4
6. Washer Stainless steel A4
7. Bolt Stainless steel A4
8. Diaphragm EPDM
9. Spring Stainless steel 316
10. Seal EPDM
11. Seal EPDM
12. Cover Ductile iron GJS-500-7
13. Nut Stainless steel A4
14. Diaphragm Support Ductile iron GJS-500-7
15. Obturator Ductile iron GJS-500-7
16. Regulating Plug Stainless steel 316
17. Seat Stainless steel 316
18. Stem Stainless steel 316
19. Pilot valve Stainless steel 316
20. Pressure gauge Stainless steel 316
21. Ball valve Stainless steel 316
22. Needle valve Stainless steel 316
23. Stainless steel 316

Test/Approvals

  • Hydraulic test: 1.5 x PN |

  • Tested according to EN12266-1. Seat: 1.1 x PN (in Bar), Body: 1.5 x PN (in Bar)

  • Approved according to WRAS Series 879

Standards

  • Designed according to EN 1074 - 5
  • Face to face according to EN558 Table 2 Basic Series 1
  • Standard flange drilling to EN1092, PN 10/16
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