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AVPA Differential Pressure Relief Controller
Brand: Danfoss
AVPA is a self-acting differential pressure relief controller primarily for use in district heating systems. The controller is normally closed and opens on rising differential pressure.
The controller has a control valve, an actuator with one control diaphragm and handle for differential pressure setting.
Specifications
Brand
Actuator Size
- 6.04 in² (39 cm²) for PN 16
- 8.37 in² (54 cm²) for PN 25
BSP Connection
- G 1” A
- G 1-1/4” A
- G 1-3/4” A
- G 2” A
- G 2-1/2” A
- G 3/4” A
Cone Material
- Dezincing Free Brass CuZn36Pb2As - Valve
Diaphragm Material
- EPDM
Differential Pressure
- psi: 174 to 290 (kPa: 1,200 to 2,000, bar: 12 to 20) - Max.
Enclosure Finish
- Black - Spring Colour: PN 16
- Grey - Spring Colour: PN 16
- Red - Spring Colour: PN 25
- Yellow - Spring Colour: PN 25
Enclosure, Body Material
- 304L Stainless Steel - Upper Casing of Diaphragm
- Dezincing Free Brass CuZn36Pb2As - Lower Casing of Diaphragm
- Ductile Iron EN-GJS-400-18-LT - Valve
- Red Bronze CuSn5ZnPb (Rg5) - Valve
- Zinc Chromatic Steel, DIN 1624, No. 1.0338 - Actuator
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 - 1” (DN 25)
- 1” (DN 25) - PN 16
- 1” (DN 25) - PN 25
Flange Size - 1/2” (DN 15)
- 1/2” (DN 15) - PN 16
- 1/2” (DN 15) - PN 25
Flange Size - 2” (DN 50)
- 2” (DN 50) - PN 25
Flange Size - 3/4” (DN 20)
- 3/4” (DN 20) - PN 16
- 3/4” (DN 20) - PN 25
Flow Rate
- 4 to 25 Kvs (m³/hour)
Materials of Construction
- Copper Tube Ø 6 x 1 mm - Impulse Tube
- Piston
Measuring Range
- pH: 7 to 10
Media
- Circulation Water
- Glycolic Water
Nominal Pressure
- psi: 362.6 (kPa: 2,500, bar: 25)
Process Temperature
- 2° to 150° C (35.6° to 302° F)
Seat / Seal Material
- Seal: EPDM
- Seat: 316Ti Stainless Steel - Valve
Setting Range
- psi: 0.72 to 29 (kPa: 5 to 200, bar: 0.05 to 2)
