Specifications

RK0YG302 © Danfoss 04/2007 165
AKVA 10 AKVA 15, AKVA 20
AKVA are electrically operated expansion valves designed for
ammonia refrigerating plant. The AKVA valves are normally
controlled by a controller from Danfoss’ range of
ADAP-KOOL® controllers.
The AKVA valves are supplied as a component programme, as
follows:
• Separate valve
• Separate coil with terminal box or cable
• Spare parts in the form upper part, orice and lter
The individual capacities are indicated with a number forming part
of the type designation. The number represents the size of the
orice of the valve in question.
A valve with orice 3 will for example be designated AKVA 10-3.
The orice assembly is replaceable.
Features
• For ammonia (R 717),
R744, HCFC, HFC
• The valve requires no adjustment
• Wide regulation range
• Replaceable orice 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.
Approvals
DEMKO, Denmark
SETI, Finland
SEV, Switzerland
UL listed to U.S. and Canadian standards
(separate code. nos.)
AKVA 20 is CE certied according to pressure directive 97/23.
Valve type AKVA 10 AKVA 15 AKVA 20
Tolerance of coil
voltage
+10/–15%
Enclosure to
IEC 529
Max. IP 67
Working principle PBM Pulse-width modulation)
Recommend period
of time
6 seconds
Capacity (R717) 4 to 100 kW 125 to 500 kW 500 to 3150 kW
Regulation range
(Capacity range)
10 - 100%
Connection Weld
Media temperature – 50 to 60°C – 40 to 60°C – 40 to 60°C
Ambient
temperature
– 50 to 50 °C – 40 to 50 °C – 40 to 50 °C
Leak of valve seat < 0.02% of kv-value
MOPD 18 bar 22 bar 18 bar
Filter, replaceable
Internal 100 μm,
replaceable
External
100 μm
External
100 μm
Permissible
operation pressure
Ps = 42 bar g Ps = 42 bar g Ps = 42 bar g
Technical data
AKVA 10, AKVA 15, AKVA 20