AVK SURGE ANTICIP./RELIEF CONTROL VALVE, PN10/16
Reduced bore, AISI304/DI trim, AISI304 pilot, brass fittings/accs., EPDM/WRAS rubber
Contact
Pham Trung
Technical Manager
Control valve, surge anticip./relief, for drinking water or other neutral liquids to max. 70°C
AVK series 879 diaphragm actuated surge anticipation and relief control valves constantly monitor the system pressure and protect against pressure surges.
The pressure relief opens the valve to dump excess pressure when it exceeds the high setpoint.
The surge anticipation senses the rapid pressure drop from a suddenly failed pump that is often followed by a rapid and dangerous high-pressure surge. The drop below the low setpoint opens the valve, this time to make it ready to dissipate the anticipated pressure surge.
A replaceable spring inside the pilot makes it possible to operate in different pressure ranges and still keep the high precision. Precise setting and easy adjustment on a control knob on the pilots.
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 879/008X99-001 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN65 - DN600 |
| 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
Downloads
Reference nos. and dimensions:
| AVK ref. no. | DN mm |
Flange drilling |
Hi press. range/bar |
Lo press. range/bar |
D1 mm |
D2 mm |
D3 mm |
Dh mm |
W mm |
H3 mm |
L mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 879-0065-00-14400849999 | 65 | PN16 | 2-15 | 1-5 | 118 | 145 | 185 | 19 | 324 | 453 | 290 | 36 |
| 879-0080-00-14400849999 | 80 | PN16 | 2-15 | 1-5 | 132 | 160 | 200 | 19 | 339 | 470 | 310 | 40 |
| 879-0100-00-14400849999 | 100 | PN16 | 2-15 | 1-5 | 156 | 180 | 220 | 19 | 351 | 488 | 350 | 45 |
| 879-0125-00-14400849999 | 125 | PN16 | 2-15 | 1-5 | 184 | 210 | 250 | 19 | 375 | 506 | 400 | 49 |
| 879-0150-00-14400849999 | 150 | PN16 | 2-15 | 1-5 | 211 | 240 | 285 | 23 | 405 | 509 | 480 | 62 |
| 879-0200-00-14400849999 | 200 | PN16 | 2-15 | 1-5 | 266 | 295 | 340 | 23 | 466 | 605 | 600 | 112 |
| 879-0250-00-14400849999 | 250 | PN16 | 2-15 | 1-5 | 319 | 355 | 405 | 28 | 587 | 716 | 730 | 173 |
| 879-0300-00-14400849999 | 300 | PN16 | 2-15 | 1-5 | 370 | 410 | 460 | 28 | 629 | 789 | 850 | 237 |
| 879-0350-00-14400849999 | 350 | PN16 | 2-15 | 1-5 | 429 | 470 | 520 | 28 | 690 | 875 | 980 | 340 |
| 879-0400-00-14400849999 | 400 | PN16 | 2-15 | 1-5 | 480 | 525 | 580 | 31 | 750 | 996 | 1100 | 511 |
| 879-0450-00-14400849999 | 450 | PN16 | 2-15 | 1-5 | 548 | 585 | 640 | 31 | 810 | 1060 | 1200 | 658 |
| 879-0500-00-14400849999 | 500 | PN16 | 2-15 | 1-5 | 609 | 650 | 715 | 34 | 885 | 1245 | 1250 | 948 |
| 879-0600-00-14400849999 | 600 | PN16 | 2-15 | 1-5 | 720 | 770 | 840 | 37 | 1010 | 1355 | 1450 | 1285 |
Components
| 1. | Body | Ductile iron 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 AISI 304 |
| 7. | Bolt | Stainless steel A2 |
| 8. | Diaphragm | EPDM rubber |
| 9. | Spring | Stainless steel AISI 304 |
| 10. | Flat seal | EPDM rubber |
| 11. | Flat seal | EPDM rubber |
| 12. | Cover | Ductile iron GJS-500-7 |
| 13. | Hex nut | Stainless steel A2 |
| 14. | Diaphragm support | Ductile iron GJS-500-7 |
| 15. | Obturator | Ductile iron GJS-500-7 |
| 16. | Regulating plug | Stainless steel AISI 304 |
| 17. | Seat | Stainless steel AISI 304 |
| 18. | Stem | Stainless steel AISI 304 |
| 19. | Pilot valve | Stainless steel |
| 20. | Pilot valve | Stainless steel |
| 21. | Pressure gauge | Stainless steel |
| 22. | Ball valve | Brass, Ni-plated |
| 23. | Needle valve | Stainless steel |
| 24. | Y-strainer / Orifice | Brass + SS 316 |
Test/Approvals
- Hydraulic test: 1.5 x PN |
- Tested according to EN 12266-1
- Approved according to ACS-France
- Approved according to WRAS Certificate 2010005, max 50°C
Standards
- EN 1074-5
- Face-to-face dimension according to EN 558, Series 1
- Flange drilling to EN1092, PN10/16
