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AVK CONTROL VALVE, ALTITUDE LEVEL, ONE WAY, PN10/16

Reduced bore, SS-304/DI trim

Control valve, altitude level, one way, for drinking water or other neutral liquids to max. 70°C

AVK series 869 diaphragm actuated one-way altitude control valves automatically maintain the water level in a tank or a reservoir without the use of floats or sensors. The altitude pilot senses the pressure from the water level and opens to refill when the level drops below the set-point. The one-way mode makes sure to block the flow in case of reverse differential pressure.

A replaceable spring inside the pilot makes it possible to operate in different altitude ranges and still keep the high precision.

Adjustment of the setpoint is by a control knob on the pilot.

Variant 869/2031-001
Connection: Flanged
Material: Ductile iron
DN: DN80 - DN500
PN: PN 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 internal parts in 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
  • Integrated lifting holes on body from DN150 for ease of handling

Downloads

Datasheet
Tender Text
Installation, operation and maintenance manuals

Reference nos. and dimensions:

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Reference no. DN
mm		 Flange
drilling		 Press. Range
bar		 L
mm		 L2
mm		 W1
mm		 W2
mm		 H3
mm		 Theoretical
weight/kg
869-0080-20-1340030 80 PN10/16 0.01 - 0.6 375 310 108 275 456 24
869-0080-20-1340031 80 PN10/16 0.5 - 2.1 375 310 108 275 456 24
869-0100-20-1340030 100 PN10/16 0.01 - 0.6 405 350 117 285 472 28
869-0100-20-1340031 100 PN10/16 0.5 - 2.1 405 350 117 285 472 28
869-0150-20-1340030 150 PN10/16 0.01 - 0.6 530 480 143 312 533 46
869-0150-20-1340031 150 PN10/16 0.5 - 2.1 530 480 143 312 533 46
869-0200-20-0340030 200 PN10 0.01 - 0.6 615 600 203 337 623 96
869-0200-20-0340031 200 PN10 0.5 - 2.1 615 600 203 337 623 96
869-0200-20-1340030 200 PN16 0.01 - 0.6 615 600 203 337 623 96
869-0200-20-1340031 200 PN16 0.5 - 2.1 615 600 203 337 623 96
869-0250-20-0340030 250 PN10 0.01 - 0.6 745 730 254 362 727 157
869-0250-20-0340031 250 PN10 0.5 - 2.1 745 730 254 362 727 157
869-0250-20-1340030 250 PN16 0.01 - 0.6 745 730 254 362 727 157
869-0250-20-1340031 250 PN16 0.5 - 2.1 745 730 254 362 727 157
869-0300-20-0340030 300 PN10 0.01 - 0.6 850 850 277 387 811 221
869-0300-20-0340031 300 PN10 0.5 - 2.1 850 850 277 387 811 221
869-0300-20-1340030 300 PN16 0.01 - 0.6 850 850 277 387 811 221
869-0300-20-1340031 300 PN16 0.5 - 2.1 850 850 277 387 811 221
869-0350-20-0340030 350 PN10 0.01 - 0.6 980 980 302 417 874 324
869-0350-20-0340031 350 PN10 0.5 - 2.1 980 980 302 417 874 324
869-0350-20-1340030 350 PN16 0.01 - 0.6 980 980 302 417 874 324
869-0350-20-1340031 350 PN16 0.5 - 2.1 980 980 302 417 874 324
869-0400-20-0340030 400 PN10 0.01 - 0.6 1100 1100 355 445 998 505
869-0400-20-1340030 400 PN16 0.01 - 0.6 1100 1100 355 445 998 505
869-0450-20-0340030 450 PN10 0.01 - 0.6 1200 1200 398 472 1065 645
869-0450-20-0340031 450 PN10 0.5 - 2.1 1200 1200 398 472 1065 645
869-0450-20-1340030 450 PN16 0.01 - 0.6 1200 1200 398 472 1065 645
869-0450-20-1340031 450 PN16 0.5 - 2.1 1200 1200 398 472 1065 645
869-0500-20-0340031 500 PN10 0.5 - 2.1 1250 1250 465 495 1184 945
Enquiry
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Components

1. O-ring EPDM rubber
2. Plug sealing EPDM rubber
3. Washer Stainless steel A2
4. Diaphragm EPDM rubber
5. Bolt Stainless steel A2
6. Nut Stainless steel A2
7. Stem Stainless steel AISI 431
8. Stem guide Stainless steel AISI 304
9. Bonnet Ductile iron GJS-500-7 (GGG-50)
10. Spring Stainless steel AISI 304
11. Washer Bronze CC499K
12. Diaphragm support Ductile iron GJS-500-7 (GGG-50)
13. Disc retainer Ductile iron GJS-500-7 (GGG-50)
14. Regulating disc Stainless steel AISI 304
15. Seat Stainless steel AISI 304
16. Body Ductile iron GJS-500-7 (GGG-50)
17. Filter Stainless steel AISI 304
18. Plug Stainless steel AISI 304
19. Pilot valve Stainless steel AISI 304
20. Needle valve Stainless steel AISI 304
21. Control orifice Stainless steel AISI 304

Test/Approvals

  • Hydraulic test according to EN 1074-1 and 5/ EN12266
  • WRAS approved materials

Standards

  • EN 1074-5
  • Face-to-face dimension according to EN 558, Series 1
  • Flange drilling to EN1092, PN10/16
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