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AVQ Flow Controller
Brand: Danfoss
AVQ is a self-acting flow controller primarily for use in district heating systems. The controller closes when set maximum flow is exceeded.
The controller has a control valve with adjustable flow restrictor and an actuator with one control diaphragm.
Specifications
Brand
Actuator Size
- 8.37 In² (54 cm²)
Actuator Type
- Electric
Adjustment
- Screws - Turning Flow Restrictor Screw Counter Clockwise
Applications
- District Heating
Approvals & Certifications
- Conical Extension Thread - EN 10226-1
- Flange PN 25 - EN 1092-2
BSP Connection
- G 1" A Male
- G 1-1/4" A Male
- G 1-3/4" A Male
- G 2" A Male
- G 2-1/2" A Male
- G 3/4" A Male
Cone Material
- Dezincing Free Brass CuZn36Pb2As
Diaphragm Material
- EPDM
Differential Pressure
- psi: 232.1 (kPa: 1,600, bar: 16)
- psi: 290.1 (kPa: 2,000, bar: 20)
Enclosure, Body Material
- Lower Casing of Diaphragm: Dezincing Free Brass CuZn36Pb2As
- Upper Casing of Diaphragm: 304L Stainless Steel
- Valve Body (Flange): Ductile Iron EN-GJS-400-18-LT
- Valve Body (Thread): Red Bronze CuSn5ZnPb (Rg5)
Flange Size - 1” (DN 25)
- 1" (DN 25) - PN 25
Flange Size - 1/2” (DN 15)
- 1/2" (DN 15) - PN 25
Flange Size - 3/4” (DN 20)
- 3/4" (DN 20) - PN 25
Flow Rate
- 0.02 to 8.83 scfm (0.03 to 15 m³/hour)
- Kv - 1.6 to 25 m³/hour
Materials of Construction
- Impulse Tube: Copper Tube
- Pressure Relieve System - Piston
Measuring Range
- Medium PH: 7 to 10
Media
- Circulation Water
- Glycolic Water up to 30 %
Mounting Position
- Any - up to 100° C Medium Temperature
Nominal Pressure
- psi: 362.6 (bar: 25, kPa: 2,500)
Process Temperature
- 2° to 150° C (35.6° to 302° F)
Seat / Seal Material
- 316Ti Stainless Steel
- EPDM
- District heating systems