Data Sheet for Product
Technical Instructions MVS661..N Series Modulating Refrigerant Valves
Document Number 155-404 for Ammonia (R717) and Safety Refrigerants
May 11, 2016
Page 2 Siemens Industry, Inc.
Product Numbers
The refrigeration capacity refers to applications using ammonia.
Table 1. Product Numbers.
Product Number
Line
Size
In
(mm)
C
V
(k
vs
)
C
V
(k
vs
)
Reduced
p
max
psi
[MPa]
Q
0
E
[kW]
Q
0
H
[kW]
Q
0
D
[kW]
S
NA
[VA]
P
med
[W]
MVS661.25-016N
1
(25)
0.18
(0,16)
0.12 (0,10)
363
(2,5)
95
10
2
22
12
MVS661.25-0.4N
0.46
(0,40)
0.29 (0,25)
245
26
5
MVS661.25-1.0N
1.16
(1,0)
0.73 (0,63)
610
64
12
MVS661.25-2.5N
2.89
(2,5)
1.85 (1,6)
1530
159
29
MVS661.25-6.3N
7.28
(6,3)
4.62 (4,0)
3850
402
74
Cv = Nominal flow rate of refrigerant through the fully open valve (H
100
) at a
differential pressure of 1 psi.
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% (see C
V
(k
vs
) reduction).
∆p
max
= Maximum permissible differential pressure across the control path 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 = 7.25 psi (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 4.35 psi
(0.3 bar) each, and 23 psi (1.6 bar) upstream of the evaporator (for example, spider).
The capacities specified are based on superheating by 6K and sub-cooling by 2K.
Accessories
Valve insert ASR..N
Table 2. Accessories.
Product
Number
Line
Size In
(mm)
C
V
(k
vs
)
ASR0.16N
1 (25)
0.18 (0,16)
ASR0.4N
0.46 (0,40)
ASR1.0N
1.16 (1,0)
ASR2.5N
2.89 (2,5)
ASR6.3N
7.28 (6,3)
The refrigeration capacity for various refrigerants and operating conditions can be
calculated for the three types of application using Table 6 through Table 11.
For accurate valve sizing, use the valve selection program Refrigeration VASP.
Ordering
The valve body and magnetic actuator form one integral unit and cannot be separated.