Data Sheet for Product

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Siemens Modulating refrigerant valves, PN 63 CE2N4717en
Smart Infrastructure 2019-11-25
Type summary
The refrigeration capacity refers to applications using ammonia.
Product nu
m
ber
DN
k
vs
k
vs
reduced D
p
max
Q
0
E Q
0
H Q
0
D
S
NA
P
med
[m
3
/h] [m
3
/h] [MPa]
[kW] [kW] [kW]
[VA] [W]
MVS661.25-016N
25
0,16 0,10
2,5
95 10 2
22 12
MVS661.25-0.4N
25
0,40 0,25
245 26 5
MVS661.25-1.0N
25
1,0 0,63
610 64 12
MVS661.25-2.5N
25
2,5 1,6
1530 159 29
MVS661.25-6.3N
25
6,3 4,0
3850 402 74
k
vs
= Nominal flow rate of refrigerant through the fully open valve (H
100
) at a differential pressure
of 100 kPa (1 bar) to VDI 2173
If required k
vs
-value and refrigeration capacity Q
0
can be reduced to 63 %, refer to «k
vs
re-
duction» on page 4
∆p
max
= Maximum permissible differential pressure across the control path A à AB of the valve,
valid for the entire actuating range of the motorized valve
Q
0
E = Refrigeration capacity in expansion applications
Q
0
H = Refrigeration capacity in hot-gas bypass applications
Q
0
D = Refrigeration capacity in suction throttle applications and ∆p = 0.5 bar
S
NA
= nominal apparent power for selecting the transformer
P
med
= typical power consumption
The pressure drop across evaporator and condenser is assumed to be 0.3 bar each, and 1.6 bar up-
stream of the evaporator (e.g. spider).
The capacities specified are based on superheating by 6 K and subcooling by 2 K.
Product number DN k
vs
[m
3
/h]
ASR0.16N 25 0,16
ASR0.4N 25 0,40
ASR1.0N 25 1,0
ASR2.5N 25 2,5
ASR6.3N 25 6,3
The refrigeration capacity for various refrigerants and operating conditions can be cal-
culated for the 3 types of application using the tables starting from page 15.
For accurate valve sizing, the valve selection program "Refrigeration VASP" is recom-
mended.
If plant is resized, or should excessive wear impact the valve’s perfor-
mance, a new valve insert ASR…N will restore the valve’s characteris-
tics to its original specifications.
The valve insert is supplied complete with Mounting Instructions
74 319 0486 0.
Accessories
Valve insert ASR..N