AVD Pressure Reduction Controller

Brand: Danfoss

AVD is a self-acting pressure reduction controller primarily for use in district heating systems. The controller is normally opened and closes on rising pressure. 

The controller has a control valve, an actuator with one control diaphragm and a spring(s) for pressure setting.

Specifications

Brand

Actuator Size

  • 8.37 In² (54 cm²)

Applications

  • Heating Systems

Approvals & Certifications

  • EN 1092-2

BSP Connection

  • G 1” A
  • G 1-1/4” A
  • G 3/4” A

Cone Material

  • Valve Cone - Dezincing Free Brass CuZn36Pb2As

Diaphragm Material

  • EPDM

Differential Pressure

  • Maximum
  • psi: 14.5 to 72.52 (kPa: 100 to 500, bar: 1 to 5) - Setting Range for Actuator
  • psig: 43.51 to 174 (kPa: 300 to 1,200, bar: 3 to 12) - Setting Range for Actuator

Enclosure, Body Material

  • 304L Stainless Steel - Actuator Housing (Upper Casing of Diaphragm)
  • Dezincing Free Brass CuZn36Pb2As - Actuator Housing (Lower Casing of Diaphragm)
  • Ductile Iron EN-GJS-400-18-LT (GGG-40.3) - Flange DN 32 to DN 50
  • Red Bronze CuSn5ZnPb (Rg5) - Thread DN 15 to DN 25

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - PN 25

Flange Size - 1-1/4” (DN 32)

  • 1-1/4” (DN 32) - PN 25

Flange Size - 2” (DN 50)

  • 2” (DN 50) - PN 25

Flow Rate

  • 0.23 to 14.71 scfm (0.4 to 25 m³/hour)

Materials of Construction

  • Copper Tube Ø 6 x 1 mm - Impulse Tube
  • Piston - Pressure Relieve System

Measuring Range

  • pH: 7 to 10

Media

  • Circulation Water
  • Glycolic Water Up to 30 %

Mounting Position

  • Any Orientation
  • Horizontal

Nominal Pressure

  • psi: 362.6 (kPa: 2,500, bar: 25)

Process Fitting Details

  • Compression Fitting

Process Temperature

  • 2° to 150° C (35.6° to 302° F)

Seat / Seal Material

  • Sealing - EPDM
  • Valve Seat - 316Ti Stainless Steel

  • Heating Systems

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