Danfoss Differential Pressure Relief Controller, AVDA
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AVDA Differential Pressure Relief Controller

Brand: Danfoss
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AVDA is self-acting differential pressure relief controller used for constant flow control or bypass control. Controller opens on rising differential pressure. 

The controller has a control valve, an actuator with one control diaphragm and handle for differential pressure setting.

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Specifications

Brand

Applications

  • District Heating Plant

BSP Connection

  • 1” BSPP Female
  • 1/2” BSPP Female
  • 3/4” BSPP Female

Cone Material

  • Valve Cone: NBR-Rubber

Diaphragm Material

  • EPDM-Rubber

Differential Pressure

  • Maximum

Enclosure, Body Material

  • Diaphragm Housing: Zinc Chromatic Steel, DIN 1624, 1.0338
  • Valve Body: MS 58, Hot-Pressed, DIN 17660, W.No. 2.0402, CuZn40Pb2

Flange Size - 1” (DN 25)

  • 1” (DN 25) - PN 10

Flange Size - 1/2” (DN 15)

  • 1/2” (DN 15) - PN 10

Flange Size - 3/4” (DN 20)

  • 3/4” (DN 20) - PN 10

Flow Rate

  • 1.11 to 3.23 scfm (1.9 to 5.5 m³/hour)

Measuring Range

  • Medium pH: 7 to 10

Media

  • Circulation Water
  • Glycolic Water up to 30 %

Mounting Position

  • Horizontal
  • Vertical

Nominal Pressure

  • psi: 145 (kPa: 1,000, bar: 10)

Process Temperature

  • -25° to 130° C (-13° to 266° F)

Seat / Seal Material

  • Valve Seat: Cr Ni Steel, DIN 17660, W.No. 1.4301

Setting Range

  • psi: 1.45 to 17.4 (kPa: 10 to 120, bar: 0.1 to 1.2)

Spindle Material

  • Dezincing-Free Brass, BS 2874 / CZ132

  • Apartment block heating
  • District heating plant
  • Central heating systems

Documentation

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