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.
• Wide regulation range.
• 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.