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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