User Manual

Type summary
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Building Technologies Refrigerant Valves PN 40 CE2N4716en
The refrigeration capacity refers to applications using ammonia.
Type reference DN k
vs
Q
0
E Q
0
H Q
0
D
[m
3
/h] [kW] [kW] [kW]
MVF661.25-0.16N 25 0.16 95 10 2
MVF661.25-0.4N 25 0.40 245 26 5
MVF661.25-1.0N 25 1.0 610 64 12
MVF661.25-2.5N 25 2.5 1530 159 29
MVF661.25-6.3N 25 6.3 3850 402 74
Type reference DN k
vs
Q
0
E Q
0
H Q
0
D
[m
3
/h] [kW] [kW] [kW]
ASR0.16N 25 0.16 95 10 2
ASR0.4N 25 0.40 245 26 5
ASR1.0N 25 1.0 610 64 12
ASR2.5N 25 2.5 1530 159 29
ASR6.3N 25 6.3 3850 402 74
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Refrigerant valves
Valve inserts
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
The k
vs
values and the Q
0
refrigeration capacities can be reduced to 63 % if required, refer to
page 4 «k
vs
reduction »
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
Q
0
With R717 at t
0
= 0 °C and t
c
= 40 °C
The pressure drop across evaporator and condenser is assumed to be 0.3 bar each, and 1.6 bar
upstream of the evaporator (e.g. spider).
The capacities specified are based on superheating by 6 K and subcooling by 2 K.
The refrigeration capacity for various refrigerants and operating conditions can be
calculated for the 3 types of application using the tables at the end of this Data Sheet.
For accurate valve sizing, the valve selection program "Refrigeration VASP" is
recommended.
Order
Valve body and magnetic actuator form one integral unit and cannot be separated.
When ordering, please give quantity, product name and type reference.
Example:
1 refrigerant valve MVF661.25-0.4N
Should the valve’s electronics become faulty, the entire electronics housing is to be
replaced by spare part ASR61, which is supplied complete with Mounting Instructions
(74 319 0270 0).
Replacement
electronics ASR61
If plant is resized, or should excessive wear impact the
valve’s performance, a new valve insert ASR…N will restore
the valve’s characteristics to its original specifications.
The valve insert is supplied complete with Mounting
Instructions (74 319 0486 0).
Valve insert
A
SR…N
HVAC Products 08.06.2005