AVK CONSTANT FLOW CONTROL VALVE, PN16
Red. bore, parabolic plug, EN1092, AISI304/DI trim, AISI304 pilot, brass fittings and accs., EPDM/WRAS rubber, 300µm blue GSK coating, protected pos. ind.
Contact
AVK Saudi Valves
Jeddah Industrial City, Phase 4, Street no 45 P.O. Box 10830, 21443 Jeddah 24/7 Leakage Repair Service +966 50 595 5166
Control valve, constant flow, for drinking water or other neutral liquids to max. 70°C
AVK series 879 diaphragm actuated flow control valves (CFV) automatically maintain a constant flow regardless of changes in inlet or outlet pressure.
Feed back to the regulating system 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 handwheel on the pilot.
| Variant 879/002X99-001 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN300 - DN300 |
| 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, 300 micron, 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
- 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
Downloads
Reference nos. and dimensions:
| AVK ref. no. | DN mm |
Flange drilling |
Flow range m3/h |
D1 mm |
D2 mm |
D3 mm |
Dh mm |
W mm |
H3 mm |
L mm |
L1 mm |
Theoretical weight / kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 879-0300-00-14400209999 | 300 | PN16 | 120-420 | 370 | 410 | 460 | 28 | 555 | 760 | 850 | 867 | 220 |
| 879-0300-00-14400219999 | 300 | PN16 | 170-550 | 370 | 410 | 460 | 28 | 555 | 760 | 850 | 867 | 220 |
| 879-0300-00-14400229999 | 300 | PN16 | 250-870 | 370 | 410 | 460 | 28 | 555 | 760 | 850 | 867 | 220 |
Components
| 1. | Body | Ductile iron EN GJS-500-7 |
| 2. | O-ring | EPDM rubber |
| 3. | O-ring | EPDM rubber |
| 4. | Plug sealing | EPDM rubber |
| 5. | Hex nut | Stainless steel A2 |
| 6. | Washer | Stainless steel 304 |
| 7. | Bolts | Stainless steel A2 |
| 8. | Diaphragm | EPDM rubber |
| 9. | Spring | Stainless steel 304 |
| 10. | Flat seal | EPDM rubber |
| 11. | Flat seal | EPDM rubber |
| 12. | Cover | Ductile iron EN GJS-500-7 |
| 13. | Hex nut | Stainless steel A2 |
| 14. | Diaphragm support | Ductile iron EN GJS-500-7 |
| 15. | Obturator | Ductile iron EN GJS-500-7 |
| 16. | Regulating plug | Stainless steel 304 |
| 17. | Seat | Stainless steel 304 |
| 18. | Stem | Stainless steel 304 |
| 19. | Pilot valve | Stainless steel |
| 20. | Calibrated Orifice | Stainless steel 304 |
| 21. | Ball valve | Nickel Brass |
| 22. | Needle valve | Stainless steel |
| 23. | Y-strainer / Orifice | Brass + SS 316 |
Test/Approvals
- Hydraulic test: 1.5 x PN |
- Tested according to EN12266-1.
Standards
- Designed according to EN 1074 - 5
- Face to face according to EN 558 Table 2 Basic Series 1
- Flange drilling to EN1092-2 (ISO 7005-2), PN10/16
