Components for CO
2
applications in
Industrial Refrigeration
March 2005 edition
Application guide
REFRIGERATION AND
AIR CONDITIONING
2 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Contents
Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
General information about CO
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Design pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Material compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Water in CO
2
systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Safety valves in CO
2
systems
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Capacity
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Components for CO
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Coils for solenoid valves
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Pilot valve type CVP (XP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
Hot-gas capacity for ICS with CVP (XP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Pressure transmitters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Eliminator
®
liquid line filter driers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
Delivery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Danfoss A/S (RC-CMS / MWA), 03 - 2005 RA0XA502 3
Introduction
The objective of this application guide is to
provide an overview of which Danfoss Industrial
Refrigeration products are suitable for use in CO
2
applications.
Today, Danfoss is offering a broad programme of
industrial products applicable for CO
2
, however
this is dependent on demands regarding the
design pressure. The table on page 8 lists
the components which are suitable for CO
2
applications together with the maximum
working pressure limits.
General information about CO
2
For further background information about CO
2
as
a refrigerant, please refer to the Danfoss article
"CO
2
Refrigerant for Industrial Refrigeration"
(literature number RZ0ZR).
There are a number of important factors to be
taken into consideration when determining the
design pressure.
1. Pressure during operation:
The pressure during operation is
dependent on actual system design
(single stage, cascade system or CO
2
-
”brine” system) and the load variation.
2. Pressure during “stand still”:
The pressure during stand still can be
very high and this has to be taken into
consideration:
• A small separate refrigeration system
can be used to keep the liquid
temperature at a level, where the
saturated pressure is lower than
the design pressure
• Designing the system with an expansion
vessel of a size that prevents the
pressure from exceeding the design
pressure.
• Designing the plant so that it can
withstand the saturated pressure at the
design temperature (approx. 80 bar)
From Danfoss’ experience, it would appear
that the most common solution for industrial
refrigeration applications is to use a small
separate refrigeration system to limit the
temperature of the liquid CO
2
.
Design pressure 3. Pressure tolerances for safety valves
(10 – 15 %)
Safety valves require a certain pressure
difference (difference between set pressure
and reseating pressure) to ensure that the
valve is closed properly.
Normally the closing tolerance is 10%
of the set pressure. Additionally, it is good
practice to add 3-5% to the closing
tolerance, to take care of any pressure
variations / peaks.
Note:
In the “IoR - Code of Practice” issued by
the Institute of Refrigeration in London, the
above mentioned tolerance is stated to be
20%
4. Temperature / pressure requrements for
defrosting
Depending on the actual design, different
ways of defrosting can be applied (natural,
water, electrical or CO
2
hot gas defrosting).
The CO
2
hot gas defrosting is the most
efficient, especially at low temperatures,
but it also has the highest pressure
demand. With a design pressure of PS=52
bar, it is possible to reach a defrosting
temperature of approx. 9-10°C. The
saturated pressure at 9°C is 43.9 bar g. By
adding 10% for the safety valves and
approx. 5% for pressure peaks, the
requirement is for pressure PS ~ 52 bar g.
There is not one common method to perform
defrosting. All methods, as described above, are
used, depending on the system, but also on the
availability of suitable compressors and other
components.
4 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Material compatibility
The tests have shown that CO
2
is different,
and modifications have to be made on some
products. The large amount of CO
2
, which
can dissolve in polymers, has to be taken into
consideration. Some commonly used
polymers are not compatable with CO
2
, and
others require different fixing methods e.g.
sealing materials.
When the pressure is close to the critical
pressure and the temperature is high, the impact
on polymers is much more extreme. However,
those conditions are not important for industrial
refrigeration as pressure and temperatures are
lower for these systems.
CO
2
is compatible with almost all common
metallic materials, unlike NH
3
. There are no
restrictions from a compatibility point of view,
when using copper or brass.
The compatibility of CO
2
and polymers is much
more complex. As CO
2
is a very inert and stable
substance, the chemical
reaction with polymers is not critical. The main
concern with CO
2
is the physiochemical effects,
such as permeation, swelling and the generation
of cavities and internal fractures. These effects are
connected with the solubility and diffusivity of
CO
2
in the actual material.
Danfoss has carried out a number of tests to
ensure that components released for use with
CO
2
can withstand the impact of CO
2
in all
aspects.
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Danfoss A/S (RC-CMS / MWA), 03 - 2005 RA0XA502 5
In NH
3
systems it is well known that there are
problems as a result of reaction with oil, oxygen,
water and solid contaminations, but these are all
handled today by frequent oil changes and use of
air purgers. Compared to NH
3
CO
2
is less sensitive,
but if water is present, problems may occur.
How can water penetrate into a CO
2
system?
• The pressure of CO
2
systems is always above
the atmospheric pressure, therefore there are
not the same risks as in e.g. NH
3
systems, of
air/water penetration into a leaking CO
2
system. However, pemeation of water into the
system is still possible.
• When charging CO
2
, there are different grades
of CO
2
, some of which allow relatively high
amounts of water.
• CO
2
is a safe refrigerant, and therefore there is
a risk, that it is handled without following the
normal refrigeration safety requirements. If a
system is opened up, air can penetrate into it,
and the moisture can condense inside the
tubes. If the system is not evacuated properly,
some water may well be retained.
• By charging lubricant (oil) to the compressor.
• Incomplete water removal during installation/
commissioning
Water in CO
2
systems
Fig. 1: Water solubility
Fig. 1 shows the maximum (water) moisture
content that can be dissolved in the liquid and
gas phases of CO
2
.
0
200
400
600
800
1000
1200
-60
-40 -20 0 20 40 60
Temperature
Weight *10-6 of water / weight of
refrigerant [ppm]
Liquid CO
2
Vapour CO
2
[
o
C]
[
o
F]
-40 3
2
104
-76
-4 6
8
14
0
Water solubility in liquid / vapour CO
2
From the reports, it seems that incomplete water
removal, due to insufficient vacuum procedure, is
one of the main reasons for water contamination
in CO
2
systems. Vacuum procedures sufficient for
ammonia systems are not sufficient for CO
2
systems.
The acceptable amount of water in CO
2
systems
is much lower than in systems with other
common refrigerants. If the water content
exceeds the dew-point, and the temperature is
below 0°C, the water will freeze, creating a risk
of problems with equipment in the system e.g.
blocking control valves.
The water can very easily be removed by
mounting a drier in the system.
Driers in CO
2
are very efficient, and are normally
mounted in the liquid line to avoid any
unnecessary pressure drops being created.
6 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Fig. 2: Water solubility
Water in CO
2
systems
(cont.)
Fig. 3: SGN moisture indication for CO
2
In fig. 2, the maximum water content, which can
be dissolved in the CO
2
gas phase, is compared
with other commonly used refrigerants. The
maximum water content for CO
2
is much lower
than for the other refrigerants. If the maximum
concentration is exceeded, this will appear as free
water or as ice in the refrigeration system.
An indication of water content can be obtained
by using a Danfoss SGN sight glass.
- A “dry” system is shown with a green
indicator
- A “wet” system is shown with a yellow
indicator
Water/moisture content values for these
conditions are shown in fig. 3
0
10
20
30
40
50
60
70
80
90
100
–40
–40
–20
–4
0
32
CO
2
+ H
2
O
CO
2
+
ICE
CO
2
+
Water
vapour phase
Temperature
20 °C
68 ºF
Water solubility in vapour CO
2
Weight *10-6 of water / weight of
refri
g
erant
[pp
m
]
0
500
1000
1500
2000
-60 -40 -20 0 20 40 60
R717
CO
2
R134a
-40 32 10
4
-76 -4 68 14
0
Water solubility in vapour phase
[°C]
[°F]
Weight * 10-6 of water / weight of
refrigerant [ppm]
Temperature
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Danfoss A/S (RC-CMS / MWA), 03 - 2005 RA0XA502 7
Water in CO
2
systems
(cont.)
Fig. 4: CO
2
systems with DCR filter drier and SGN indicator
Due to the thermodynamic properties of CO
2
,
in particular the triple point, which is located at
much higher pressure than for all other common
refrigerants, the formation of solid CO
2
can occur.
If a safety valve is mounted in a CO
2
system at e.g.
52 bar, the pressure in the downstream (outlet)
line from the safety valve will pass the triple point
at 5.2 bar.
Below the triple point, CO
2
will change from a
mixture of liquid and vapour into a mixture of
solid and vapour.
The formation of solid CO
2
in the downstream
line can, in the worst case, block this line.
Safety valves in CO
2
systems
The most effective solution to this problem is to
mount the safety valve without an outlet line,
thus blowing directly into the atmosphere.
The phase change of the CO
2
does not take place
directly in the valve, but just after the valve, and
in this case in the atmosphere.
If safety valves or any other safety devices, have
to be mounted in liquid lines, they must never
blow to the atmosphere or any other places
where the backpressure is below 5.2 bar.
If the back-pressure is below the triple point (5.2 bar)
a very high fraction of the CO
2
will be solid.
Fig. 5: Flow in downstream lines from safety valves
Capacity
CO
2
capacity calculations for Danfoss Industrial
Refrigeration components can be undertaken
using the DIRcalc selection software.
Principle diagram: CO
2
-NH
3
cascade system
CO
2
Evaporator
Liquid
CO
2
reciever
CO
2
Compressor
Dry suction
CO
2
- N
H
3
heat exchanger
Filter drier
Mois
ture indicator
Filter driers installed in:
• bypass lines or
• main liquid line
Liquid
Filter drie
r
Mois
ture indicator
50% solid CO
2
at
the triple point
Liquid
20 bar [290 psi]
–78.4°C [–109.1°F]
–56.6°C [–69.9°F]
–5.2 bar-a [75.1 psi-a]
+31°C [87.9°F]
Vapour
50 bar [725 psi]
Vapour
35 bar [507 psi]
0% solid CO
2
at
the triple point
3% solid CO
2
at
the triple point
1450 100
145 10
14.5 1
psi bar
Pressure
Enthalpy (J)
8 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Components for CO
2
Today, Danfoss is offering a broad programme of
industrial components applicable for CO
2
.
The majority of components listed below
have been evaluated and upgraded, and are
therefore applicable for CO
2
within the pressure
and temperature range stated in the technical
documentation. In particular the pressure is the
limiting factor for this group of components.
Special components for “high” pressure CO
2
applications have been developed. The most
common types of valves are listed on the
following pages.
Please note the high pressure specials are
generally available to order only and extended
delivery times should be considered.
Pressure Equipment Directive (PED)
The Industrial Refrigeration valves are approved
in accordance with the European standards
specified in the Pressure Equipment Directive and
are CE marked.
20 290
30 435
40 580
50 725
60 870
–30
–22
–20
–4
–10
14
0
32
10
50
20 °C
68 °F
Design temperature
52 bar
754 psi
25 bar
363 psi
”Saturated”
pressure”p”
(bara / psia)
”p” + 10%
(barg / psig)
Design pressure
”p” + 15%
(barg / psig)
Design pressure / temperature for CO
2
bar psi
Design pressure
40 bar
580 psi
The product can be used in standard version.
All products are CE approved. Code numbers for
these can be found in standard literature.
The products are available in special version (higher
test pressure, marking and documentation).
All products are CE approved.
#
Code numbers for these products are included in this
application guide
35 bar [507 psi]
46 bar [667 psi]
Danfoss Industrial Refrigeration
High pressure components
DN PS
25 bar
[363 psi]
PS
40bar
[580 psi]
PS
52 bar
[754 psi]
Main Valves, Solenoid Valves ICS 1 ICS 3 all 20-65
Motor Valves
ICM all 20-65
Pilots for ICS Valves CVP (XP)
#
CVPP(HP)
EVM
Overflow valves
OFV all 20-25 #
Stop Valves - SVA ST,LT,HS SVA
10-65 10-65 #
Regulating Valves - REG
REG all 15 - 65 #
Stop Check Valves SCA SCA
15-65 15-65 #
Filters FIA
FIA 15-65 15-65 #
Check Valves
CHV all 15- 40 #
NRVA
all 15-65
Solenoid Valves EVRS
all 10-25 #
EVRA
all 10-40
EVRAT
all 10-20
Electrically operated expansion valve AKVA
all 10-40
Safety Valves and Change Over Valves
SFV - DSV
SFA
15 -
DSV 1, 2 20-32
POV 40, 50, 80 40-80
Filter drier
DCR High pressure version #
DCR Standard
Pressure transmitter
AKS 3000
Moisture indicator
SGN
35 bar [507 psi]
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Danfoss A/S (RC-CMS / MWA), 03 - 2005 RA0XA502 9
Due to the high pressure difference between
the condenser and evaporator, the Maximum
Opening Pressure Differential (MOPD) demand
for the solenoid valve in some applications may
exceed the standard coil capabilities.
Typical applications could be:
Liquid injection for cooling the compressor
Hot gas defrost
Shut off valve before expansion valve
Therefore Danfoss offers a 20 W coil, that covers a
MOPD range up to 40 bar.
The 20 W coil program includes 24, 110 and 230 V
a.c. 50 Hz power supplies.
Coils for solenoid valves If the MOPD demands are beyond the capability
of the 20 W coil program or a d.c. supply is used,
Danfoss has developed a new coil concept,
“Power Electronic”. With this new program the
MOPD of the solenoid valve can be increased up
to 52 bar.
As illustrated below, the power of a coil with
"Power Electronic" feature, the inrush is higher
than a standard coil. After 100 msec. the power of
the coil reduces to a lower level than a standard
coil. Therefore "Power Electronic" will give a
higher MOPD and a lower power consumption
than a standard coil.
For further information, please contact Danfoss.
Power
Inrush
Holding
55 watt
4 watt
Time
Power
Time
20 watt
"Power electronic" for 230V, 50Hz Standard coil for 20W, 230V, 50Hz
Max working pressure: 52 bar g (754 psig)
K
v
/C
v
value: 0.45 m
3
/h (0.52 USgal/min)
Temperature range: –50 120°C (–58 248°F)
Pressure range
: 25 52 bar g (363 754 psig)
Technical data
The figure shows the evaporator in a CO
2
refrigeration plant with flooded evaporation and
with pump circulation. In this application the
Hot-gas capacity for ICS
with CVP (XP)
Valve type Defrosting temperature [°C] +10
[bar] 45.0
Evaporating temperature [°C]
0 -10 -20 -30 -40
[bar] 34.9 26.5 19.7 14.3 10.1
CVP (XP) +
CVH
Defrosting capacity [kW]
1004 1353 1580 1687 1854
Defrosting mass flow
[kg/h] 57 79 93 102 108
ICS 25-5 Defrosting capacity [kW] 3792 5110 5969 6573 7004
Defrosting mass flow
[kg/h] 217 298 351 386 408
ICS 25-10 Defrosting capacity [kW] 6477 8728 10195 11227 11963
Defrosting mass flow
[kg/h] 371 509 600 659 697
ICS 25-15 Defrosting capacity [kW] 9647 13000 15185 16722 17818
Defrosting mass flow
[kg/h] 552 758 893 982 1038
Suction line
Liquid line
Hot gas line
constant defrost pressure regulation is made by
means of an ICS mounted with a high-pressure
pilot valve type CVP(XP).
Pilot valve type CVP (XP)
10 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leafl et Industrial Refrigeration Valves for CO
2
Applications
Pressure transmitters AKS 3000 is a series of absolute transmitters
with high-level signal conditioned current output,
developed to meet demands in A/C and
re frig er a tion.
AKS 3000 utilises the proved piezoresistive
measuring principle, which has been used for
decades in Danfoss pressure transmitters.
The pressure reference is a sealed gauge.
This means that atmospheric pressure
variations have no infl uence on regulating
ac cu ra cy. A must in accurate low pressure
reg u la tion.
Features Designed to meet A/C and refrigeration demands
without compromising control accuracy
concerning
Tough environment
• Vibration
• Shock during operation and transport
• Humidity and ice formation
• Temperature variations
• Corrosive media like ammonia gases
and salt mist
Convenient performance
• 4 to 20 mA signal
• 1% typical accuracy
• 0.5% typical linearity
• Prepared for high pressure refrigerants
• Bar code for tracing of calibration data
Perfect system integrity
• Compact design
• Max. working pressure
≤ 60 bar
• Temperature compensation for suction
line
• Optimized accuracy at
–10°C and +20°C
for suction line installations, see page 4
•
1
/
4
-18 NPT, G
3
/
8
A or
1
/
4
fl are ensures tight
pressure connection
• All laser welded AISI 316L stainless
steel enclosure
• No soft seals
• Enclosure: IP 65 with plug; IP 67 with
cable
All materials in contact with the refrigerant and
materials for the housing are AISI 316L stainless
steel. No soft gaskets, all en vi ron men tal sealings
are made through laser weldings only.
AKS 3000 has a 4 to 20 mA output, and is
available with 2 m cable or with spade
terminals and DIN 43650 plug.
Application
• Fan speed control
• High pressure control
• Compressor capacity control
• Evaporator pressure detection
• Oil pressure control
Approvals
• UL
• CE marked acc. to the EMC directive
Technical leafl et Industrial Refrigeration Valves for CO
2
Applications
Danfoss A/S (RC-CMS / MWA), 03 - 2005 RA0XA502 11
Eliminator
®
liquid line fi lter driers protect
refrigeration and air-conditioning systems from
moisture, acids, and solid particles. With these
contaminants eliminated, systems are safer from
harmful chemical reactions and from abrasive
impurities.
For further information regarding DCR fi lter driers
please contact your local Danfoss sales company.
Eliminator
®
liquid line fi lter driers
Capacity Please see the technical leafl et RD6BD.
liquid line fi lter driers
Benefi ts, features and facts
Excellent moisture and acid adsorption
protects your refrigeration system
Highly effi cient dirt retaining capabilities on
both the suction and the liquid line
Corrosion-resistant powder-painted fi nish
including zinc phosphate pre-treatment of the
DCR shells
DM solid core - 100% molecular sieve
Max. working pressure
High pressure version: 46 bar (667 psi)
For industrial refrigeration available in
connections: Butt weld DN20-50 (3/4 -2 in.)
12 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Stop valve
Size Type Max. Working
Pressure
Connection Code Number
mm in.
10
3
/
8
SVA 10 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3829
10
3
/
8
SVA 10 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3830
15
1
/
2
SVA 15 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3831
15
1
/
2
SVA 15 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3832
20
3
/
4
SVA 20 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3815
20
3
/
4
SVA 20 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3833
25 1 SVA 25 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3834
25 1 SVA 25 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3835
32 1
1
/
4
SVA 32 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3836
32 1
1
/
4
SVA 32 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3837
40 1
1
/
2
SVA 40 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3838
40 1
1
/
2
SVA 40 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3839
50 2 SVA 50 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3840
50 2 SVA 50 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3841
65 2
1
/
2
SVA 65 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3791
65 2
1
/
2
SVA 65 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3842
Regulating valve
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
REG 15 D ANG CONE#4 52 bar (754 psi) DIN 148G3172
15
1
/
2
REG 15 D ANG CONE#5 52 bar (754 psi) DIN 148G3173
15
1
/
2
REG 15 D ANG CONE#6 52 bar (754 psi) DIN 148G3174
15
1
/
2
REG 15 D ANG CONE#7 52 bar (754 psi) DIN 148G3175
20
3
/
4
REG 20 D ANG CONE#4 52 bar (754 psi) DIN 148G3176
20
3
/
4
REG 20 D ANG CONE#5 52 bar (754 psi) DIN 148G3177
20
3
/
4
REG 20 D ANG CONE#6 52 bar (754 psi) DIN 148G3178
20
3
/
4
REG 20 D ANG CONE#7 52 bar (754 psi) DIN 148G3179
25 1 REG 25 D ANG CONE#4 52 bar (754 psi) DIN 148G3180
25 1 REG 25 D ANG CONE#5 52 bar (754 psi) DIN 148G3181
25 1 REG 25 D ANG CONE#6 52 bar (754 psi) DIN 148G3182
25 1 REG 25 D ANG CONE#7 52 bar (754 psi) DIN 148G3183
32 1
1
/
4
REG 32 D ANG CONE#10 52 bar (754 psi) DIN 148G3184
32 1
1
/
4
REG 32 D ANG CONE#8 52 bar (754 psi) DIN 148G3185
32 1
1
/
4
REG 32 D ANG CONE#9 52 bar (754 psi) DIN 148G3186
40 1
1
/
2
REG 40 D ANG CONE#10 52 bar (754 psi) DIN 148G3187
40 1
1
/
2
REG 40 D ANG CONE#8 52 bar (754 psi) DIN 148G3188
40 1
1
/
2
REG 40 D ANG CONE#9 52 bar (754 psi) DIN 148G3189
50 2 REG 50 D ANG CONE#11 52 bar (754 psi) DIN 148G3190
65 2
1
/
2
REG 65 D ANG CONE#12 52 bar (754 psi) DIN 148G3191
Ordering
Stop check valve
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
SCA D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3522
20
3
/
4
SCA D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3168
25 1 SCA D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3523
32 1
1
/
4
SCA D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3524
40 1
1
/
2
SCA D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3525
50 2 SCA D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3424
65 2
1
/
2
SCA D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3425
The following list details the most commonly
used Danfoss refrigeration components for CO
2
applications. Components with alternative types
of connections and dimensions can be supplied
on request.
The Code Numbers specified include a mix of
special high pressure and standard products.
In both cases the Maximum Working Pressures
should be adhered to.
The list also includes components which are not
suitable for use with NH
3
, but are suitable for use
for CO
2
systems (moisture indicators and filter
driers).
D = Butt weld DIN
connection
ANG = Angleway
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Danfoss A/S (RC-CMS / MWA), 03 - 2005 RA0XA502 13
Check valve
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
CHV D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3526
20
3
/
4
CHV D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3527
25 1 CHV D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3528
32 1
1
/
4
CHV D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3529
40 1
1
/
2
CHV D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3530
50 2 CHV D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3531
65 2
1
/
2
CHV D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3426
Filter
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
FIA D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3215
20
3
/
4
FIA D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3195
25 1 FIA D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3216
32 1
1
/
4
FIA D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3217
40 1
1
/
2
FIA D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3218
50 2 FIA D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3219
65 2
1
/
2
FIA D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3220
Code numbers include bodies only and filter inserts to be ordered separately
Ordering (cont.)
Overflow valve
Size Type Max. Working
Pressure
Connection Code Number
mm in.
20
3
/
4
OFV D ANG OVERFLOW VALVE 52 bar (754 psi) DIN 148G3192
25 1 OFV D ANG OVERFLOW VALVE 52 bar (754 psi) DIN 148G3193
The differential pressure can be adjusted 2-8 bar
Stop valve (stainless steel)
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
SVA-SS 15 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3843
15
1
/
2
SVA-SS 15 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3844
20
3
/
4
SVA-SS 20 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3845
20
3
/
4
SVA-SS 20 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3846
25 1 SVA-SS 25 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3847
25 1 SVA-SS 25 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3848
32 1
1
/
4
SVA-SS 32 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3849
32 1
1
/
4
SVA-SS 32 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3850
40 1
1
/
2
SVA-SS 40 D ANG STOP VALVE CAP 52 bar (754 psi) DIN 148B3851
40 1
1
/
2
SVA-SS 40 D ANG STOP VALVE H-WHEEL 52 bar (754 psi) DIN 148B3852
D = Butt weld DIN
connection
ANG = Angleway
14 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Ordering (cont.)
Overflow valve (stainless steel)
Size Type Max. Working
Pressure
Connection Code Number
mm in.
20
3
/
4
OFV-SS 20 D ANG OVER FLOW VALVE 52 bar (754 psi) DIN 148G3194
25 1 OFV-SS 25 D ANG OVER FLOW VALVE 52 bar (754 psi) DIN 148G3195
Differential pressure can be adjusted 2-8 bar
Stop check valve (stainless steel)
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
SCA-SS 15 D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3532
20
3
/
4
SCA-SS 20 D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3533
25 1 SCA-SS 25 D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3534
32 1
3
/
4
SCA-SS 32 D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3535
40 1
1
/
2
SCA-SS 40 D ANG STOP/CHECK VALVE 52 bar (754 psi) DIN 148G3536
Check valve (stainless steel)
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
CHV-SS 15 D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3537
20
3
/
4
CHV-SS 20 D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3538
25 1 CHV-SS 25 D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3539
32 1
3
/
4
CHV-SS 32 D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3540
40 1
1
/
2
CHV-SS 40 D ANG CHECK VALVE 52 bar (754 psi) DIN 148G3541
Filter (stainless steel)
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
FIA-SS 15 D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3221
20
3
/
4
FIA-SS 20 D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3222
25 1 FIA-SS 25 D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3223
32 1
3
/
4
FIA-SS 32 D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3224
40 1
1
/
2
FIA-SS 40 D ANG FILTER HOUSING 52 bar (754 psi) DIN 148H3225
Regulating valve (stainless steel)
Size Type Max. Working
Pressure
Connection Code Number
mm in.
15
1
/
2
REG-SS 15 D ANG CONE#4 52 bar (754 psi) DIN 148G3542
15
1
/
2
REG-SS 15 D ANG CONE#5 52 bar (754 psi) DIN 148G3543
15
1
/
2
REG-SS 15 D ANG CONE#6 52 bar (754 psi) DIN 148G3544
15
1
/
2
REG-SS 15 D ANG CONE#7 52 bar (754 psi) DIN 148G3545
20
3
/
4
REG-SS 20 D ANG CONE#4 52 bar (754 psi) DIN 148G3546
20
3
/
4
REG-SS 20 D ANG CONE#5 52 bar (754 psi) DIN 148G3547
20
3
/
4
REG-SS 20 D ANG CONE#6 52 bar (754 psi) DIN 148G3548
20
3
/
4
REG-SS 20 D ANG CONE#7 52 bar (754 psi) DIN 148G3549
25 1 REG-SS 25 D ANG CONE#4 52 bar (754 psi) DIN 148G3550
25 1 REG-SS 25 D ANG CONE#5 52 bar (754 psi) DIN 148G3551
25 1 REG-SS 25 D ANG CONE#6 52 bar (754 psi) DIN 148G3552
25 1 REG-SS 25 D ANG CONE#7 52 bar (754 psi) DIN 148G3553
32 1
1
/
4
REG-SS 32 D ANG CONE#10 52 bar (754 psi) DIN 148G3554
32 1
1
/
4
REG-SS 32 D ANG CONE#8 52 bar (754 psi) DIN 148G3555
32 1
1
/
4
REG-SS 32 D ANG CONE#9 52 bar (754 psi) DIN 148G3556
40 1
1
/
2
REG-SS 40 D ANG CONE#10 52 bar (754 psi) DIN 148G3557
40 1
1
/
2
REG-SS 40 D ANG CONE#8 52 bar (754 psi) DIN 148G3558
40 1
1
/
2
REG-SS 40 D ANG CONE#9 52 bar (754 psi) DIN 148G3559
D = Butt weld DIN
connection
ANG = Angleway
Technical leaflet Industrial Refrigeration Valves for CO
2
Applications
Danfoss A/S (RC-CMS / MWA), 03 - 2005 RA0XA502 15
Ordering (cont.)
Available connections
20 D (
3
/
4
in.) 25 D (1 in.) 32 D (1
1
/
4
in.) 40 D (1
1
/
2
in.)
1
3
/
8
in. SA (35) 1
1
/
8
in. SA
7
/
8
in. SA 28 SD
ICS 25-5
1 Pilot
027H2028 027H2020 027H2026 027H2025 027H2024
3 Pilots
027H2078 027H2070 027H2076 027H2075 027H2074
ICS 25-10
1 Pilot
027H2038 027H2030 027H2036 027H2035 027H2034
3 Pilots
027H2088 027H2080 027H2086 027H2085 027H2084
ICS 25-15
1 Pilot
027H2048 027H2040 027H2046 027H2045 027H2044
3 Pilots
027H2098 027H2090 027H2096 027H2095 027H2094
ICS 25 - Ordering complete factory assembled valve (body, function module and top cover)
22 SD
3
/
4
in. A (20)
1 in. A (25) 1
1
/
4
in. A (32)
3
/
4
in.SOC (20) 1 in. SOC (25)
3
/
4
in. FPT 1 in. FPT
ICS 25-5
1 Pilot
027H2023 027H2029 027H2021 027H2140
3 Pilots
027H2073 027H2079 027H2071 027H2145
ICS 25-10
1 Pilot
027H2033 027H2039 027H2031 027H2141
3 Pilots
027H2083 027H2089 027H2081 027H2146
ICS 25-15
1 Pilot
027H2043 027H2049 027H2041 027H2142
3 Pilots
027H2093 027H2099 027H2091 027H2147
Select from parts programme (see the technical leaflet RD4YA)
1 pilot
3 pilots
Hot gas defrost using ICS with CVP (XP)
Pilot
Type Max. Working
Pressure
Code Number
CVPP (HP)
40 bar (580 psi) 027B1268
CVP (XP)
52 bar (754 psi) 027B0080
CVPP (HP) CVP (XP)
Solenoid valve stainless steel
Size Type
Max. Working
Pressure
Connection Code number
mm in
10
3
/
8
EVRS 3 52 bar (754 psi) DIN 032X3080
15
1
/
2
EVRST 10 with manual stem 52 bar (754 psi) DIN 032X3083
20
3
/
4
EVRST 15 with manual stem 52 bar (754 psi) DIN 032X3085
25 1 EVRST 20 with manual stem 52 bar (754 psi) DIN 032X2237
Coils: See “Coils for Solenoid valves”
16 RA0XA502 Danfoss A/S (RC-CMS / MWA), 03 - 2005
Technical leafl et Industrial Refrigeration Valves for CO
2
Applications
Ordering (cont.)
Filter drier housing without solid core
DCR size 22 - 54 mm (
3
/
4
- 2 in.) butt weld
connection.
High pressure version - 46 bar (667 psi) - only
available from parts progamme.
Step 1 - Select the DCR housing
DCR type
Number of
cores
High pressure
steel connectors
Code number
Max. working
pressure
(PS/MWP)
Butt weld
in.
DCR 0487
1
3
/
4
023Z9451
46 bar
DCR 0489 1 023Z9452
DCR 04811 1
1
/
4
023Z9454
DCR 04813 1
1
/
2
023Z9455
DCR 04817 2 023Z9457
DCR 0967
2
3
/
4
023Z9458
46 bar
DCR 0969 1 023Z9459
DCR 09611 1
1
/
4
023Z9461
DCR 09613 1
1
/
2
023Z9462
DCR 09617 2 023Z9464
Material Code No. Access connection
Zinc-chromated steel
with 1 access connection - high pressure
023Z9918
1
/
4
in. NPT
Zinc-chromated steel
without access connection - high pressure
023Z9917
Type Material
Code no.
9 pcs.
1 piece
with gasket
with gasket without gasket
48-DM solid core 100% Molecular Sieve
023U1392 023U1393 023U1391
48-F strainer
023U1921
Step 2 - Select the DCR top cover
Step 3 - Select the DCR insert
Core surface
DM 048, DC 048 and DA 048 = 435 cm
2
48-F = 405 cm
2
Core volume
DM 048 = 760 cm
3
Please note the high pressure specials
are generally available to order only
and extended delivery times should be
considered.
Delivery
Pressure transmitter
Type Pressure range Electrical connection Pressure connection Code no.
AKS 3000 PE 0...60 BAR
DIN 43650-A,
PLUG PG9
G3/8 EN 837 060G1067
AKS 3000 PE 0...60 BAR
DIN 43650-A,
PLUG PG9
1/4-18 NPT 060G1083
AKS 3000 PE 0...60 BAR
DIN 43650-A,
PLUG PG9
7/16-20 UNF Flare
060G1329
AKS 3000 PE 0...60 BAR
DIN 43650-A,
PLUG PG9
G1/2 EN 837 060G3631
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
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