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AVPQ Differential Pressure & Flow Controller
Brand: Danfoss
AVPQ is a self-acting differential pressure and flow controller primarily for use in district heating systems. The controller closes on rising differential pressure or when set max. flow is exceeded.
The controller has a control valve with adjustable flow restrictor, an actuator with two control diaphragms and handle for differential pressure setting (fixed setting version (available on special request) is without handle).
Specifications
Brand
Actuator Size
- 6 In² (39 cm²)
BSP Connection
- G 1" A
- G 1-1/4" A
- G 1-3/4" A
- G 3/4" A
Cone Material
- Dezincing Free Brass CuZn36Pb2As - Valve
Diaphragm Material
- EPDM
Differential Pressure
- psi: 174 (kPa: 1,200, bar: 12)
Enclosure Finish
- Black - Spring Colours
- Grey - Spring Colours
Enclosure, Body Material
- Red Bronze CuSn5ZnPb (Rg5) - Valve
- Zinc Chromatic Steel 1.0338, DIN 1624 - Actuator
Flange Size - 1-1/4" (DN32)
- 1-1/4" (DN32) - PN 25
Flange Size - 1" (DN25)
- 1" (DN25) - PN 25
Flange Size - 1/2" (DN15)
- 1/2" (DN15) - PN 25
Flange Size - 3/4" (DN20)
- 3/4" (DN20) - PN 25
Flow Rate
- 1.6 to 10 Kvs (m³/hour)
Materials of Construction
- Copper Tube, Φ6 x 1 mm - Impulse Tube
Measuring Range
- pH: 7 to 10
Media
- Circulation Water
- Glycolic Water up to 30%
Nominal Pressure
- psi: 232.1 to 362.6 (kPa: 1,600 to 2,500, bar: 16 to 25)
Process Temperature
- 2° to 150° C (35.6° to 302° F) - Medium
Seat / Seal Material
- 316Ti Stainless Steel - Valve
- EPDM
Setting Range
- psi: 0.1 to 1 (kPa: 0.68 to 6.89, bar: 0.0068 to 0.068)