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Akva – Electric Expansion Valves For Ammonia

AKVA are electric expansion valves designed for ammonia refrigeration systems. The AKVA valves are usually controlled by an ADAP- KOOL® electronic controller. The AKVA valves are supplied as a component programme, featuring:
  • Separate valve
  • Separate coil with terminal box or cable
  • Spare parts in the form upper part, orifice and filter
    • The individual capacities are indicated with a number forming part of the type designation. The number represents the size of the orifice of the valve in question. A valve with orifice 3 wille.g. be designated AKVA 10-3. The orifice assembly is exchangeable.
  • Refrigerants: R744, R717, R22/R407C, R404A/R507, R410A, R134a, R407A, R23. For other refrigerants, please contact Danfoss.
  • The valve requires no adjustment.
  • Replaceable orifice assembly.
  • In some applications AKVA can be used both as expansion valve and solenoid valve.
  • Wide range of coils for d.c. and a.c.
Models:
  • AKVA 10
    • Tolerance of coil voltage: +10 / –15%.
    Enclosure to IEC 529: Max. IP 67.
    Working principle: PWM ( Pulse-width modulation).
    Recommend period of time: 6 seconds.
    Capacity (R717): 4- 100 kW.
    Regulation range: 10 - 100%.
    Connection type: Weld.
    Media temperature: -50- +60°C.
    Ambient temperature: -50- +50 °C.
    Leak of valve seat: <0.02% of Kv value.
    MOPD: 18 bar.
    Filter: Internal 100 µm replaceable.
    Max. working pressure: 42 bar g.
  • AKVA 15
    • Tolerance of coil voltage: +10 / –15%.
    Enclosure to IEC 529: Max. IP 67.
    Working principle: PWM ( Pulse-width modulation).
    Recommend period of time: 6 seconds.
    Capacity (R717): 125- 500 kW.
    Regulation range: 10 - 100%.
    Connection type: Weld. Media temperature: -40- +60°C.
    Ambient temperature: -40- +50 °C.
    Leak of valve seat: <0.02% of kv-value.
    MOPD: 22 bar.Filter: External 100 µm.
    Max. working pressure: 42 bar g.
  • AKVA 20
    • Tolerance of coil voltage: +10 / –15%.
    Enclosure to IEC 529: Max. IP 67.
    Working principle: PWM ( Pulse-width modulation).
    Recommend period of time: 6 seconds.
    Capacity (R717): 500- 3150 kW.
    Regulation range: 10 - 100%.
    Connection type: Weld.
    Media temperature: -40- +60°C.
    Ambient temperature: -40- +50°C.
    Leak of valve seat: <0.02% of Kv value. MOPD: 18 bar.
    Filter: External 100 µm. Max. working pressure: 42 bar g.