Danfoss shut-o ball valves, type
GBC,GBCH,GBCT are manually operated shut-o valves for CO2 refrigeration systems, in order
to open and to shut o inner ow path by
operating the valve spindle.
The valves are specically designed for intrinsic
standstill security, meaning that the valves can
withstand pressures normally arising when the
refrigeration system is shut o, i.e. during
serving or during unexpected power failure.
The valve structure and materials are designed
and tested specically for use with CO
refrigerant.
GBC and GBCH valves are designed to use in
subcritical CO2 refrigeration systems. GBCT
valves are approved for use in transcritical CO
systems.
Features:
• Bleed hole design to prevent liquid
entrapment when the valve is closed
• Sealing material especially for CO₂ to ensure
long term product reliability
• Customized brass material ensures consistent
performance under aggressive environment
• GBCH 28s~42s with stainless-steel butt
welding connections, suitable for systems
with stainless-steel piping
• GBCT with reinforced copper-iron tube
extensions to allow easy torch-brazing
installation
• UL/cUL Listed, complies with Pressure
Equipment Directive 2014/68/ EU
2
2
AI270047618978en-000601
MT
AK-PC 572
AK-SM 8XX
MBS 8250
MBS 8250
MBS 8250
MBS 8250
GBC 90 Bar
GBC 90 Bar
GBC 90 Bar
GBCT 140 Bar
GBC 90 Bar
GBC 90 Bar
AK- PC 572
®
AKVP
Gas cooler
Medium temp. load
Low temp. load
GBCT 140 Bar
GBCT 140 Bar
GBCT 140 Bar
NRV
NRV
NRV
NRV
LP
HP
009L6420
PS 20319SIG/140 BAR
TS -40 – 149 0C
ECO
0F
0C
<
<
<
<
SET
i
AKS 11
AKS 21A
AKS 11
AKS 11
AK-CC55
AKS 11
FC 103
AKS 11
AKS
2050
AKS
2050
AK-CC55
FC 103
AKVP
AKS 11
LT
CCMT
Light
MADE IN DENMARK
MADE IN DENMARK
CCMT
Light
DGS
ECO
0F
0C
<
<
<
<
SET
i
HP High Pressure (120-140 bar)
HP Receiver Pressure (60-90 bar)
LP Suction Pressure MT (35-55 bar)
LP Suction Pressure LT (25-30 bar)
Shut-o ball valve, type GBC, GBCH and GBCT
Applications
Typical applications for CO2 ball valves are:
• Display cases
• Supermarket stores
• Food Retail
• Industrial refrigeration
• Heat pump
Danfoss CO2 ball valves are designed for the following refrigerant cycles:
• GBC with PS = 45 bar, copper connections equipped, for subcritical systems
• GBCH with PS = 90/75 bar, copper/ stainless steel connections equipped, for subcritical systems
• GBCT with PS = 140 bar, reinforced copper connections (K65) equipped, for transcritical systems
For the application use with R744 as part of a secondary loop or cascade:
1.
The design pressure of the refrigerant containing component is not less than the design pressure of the
associated components.
2.
The component is not provided with any pressure relief or pressure regulating relief valve and that a sucient
number of valves having capacity deemed adequate shall be eld installed on the refrigeration system.
3.
When the refrigeration system is de-energized, venting of R744 may occur through the pressure regulating relief
valves, and may need to be recharged, but the valve should not be defeated or bypassed.
4.
A sucient number of pressure relief and pressure regulating valves may need to be provided based upon
system capacity and located such that no stop valve is provided between the relief valve and the parts or section
of the system being protected.
Danfoss recommends that GBCT valves are installed so that the HP side is oriented towards the highest
pressure side of the system when the valve is in the closed position.
GBCT CAUTION - RISK OF HIGH PRESSURE
Do not close with CO2 liquid temperature below ambient. This component shall be installed along with a pressure
relief valve set to discharge at no higher than the rated pressure of this component. This component is intended for
systems in which the critical pressure of the refrigerant will be exceeded. The relief valve shall comply with the
requirements of ASME Section VIII, be marked “UV” and sized based on the refrigeration system capacity.
An orange Hanging tag is added on all valves as per requirement of UL certicate.
Identication
Relevant product data is available on the product and box label. An example of a box label and product label are
shown, including an explanation of the content.
Indicates where the bleed hole of ball is located and Danfoss recommends the HP
side is oriented towards the highest pressure side of system when valve is in
closed position.
"LP"
Indicates the side without bleed hole and shall be oriented towards to the low
pressure side of system when valve is in closed position.
Danfoss
9L75002
13
7
98
10
611
12
1
5
3
2
4
Position
Description
Material
1
Connection tube
Copper (Stainless steel for GBCH 28s~42s)
2
Valve body
Brass3Ball seat
PTFE4Valve tail
Brass5Ball
Stainless steel
6
Double O-ring seal in spindle
EPDM Rubber
7
Cap seal
PTFE8Seal cap
Brass9Spindle
Brass10Pin
Stainless steel
11
Guide ring
PTFE12Schrader valve
Stainless steel
13
Bleed hole
-
Shut-o ball valve, type GBC, GBCH and GBCT
Figure 4: Marking of GBCT
Table 4: Marking of GBCT
Design and materials
Direct ow gives maximum through-ow with minimum pressure drop across valve. The combination of laserwelded valve body (2) and valve tail (4), ball seat/seal (3), double O-ring seal in spindle (6), and cap seal (7) provides
the best tightness.
Figure 5: Design and materials
Table 5: Design and materials
Dimensions
We have chosen to show dimensions of the major versions.
You will nd downloadable dimension drawings for individual code numbers on Danfoss store as part of the Visuals
tab for individual code numbers.
Weights also dier depending on the design of the individual code numbers. Weights are available as part of the
technical data for individual code numbers on Danfoss store.
6 mm x 6 mm
10 mm x 10 mm
12 mm x 12 mm
16 mm x 16 mm
18 mm x 18 mm
22 mm x 22 mm
28 mm x 28 mm
35 mm x 35 mm
42 mm x 42 mm
¼ in x ¼ in
⅜ in x ⅜ in
½ in x ½ in
⅝ in x ⅝ in
¾ in x ¾ in
⅞ in x ⅞ in
1
1
⁄8 in x 1 1⁄8 in
1
3
⁄8 in x 1 3⁄8 in
1
5
⁄8 in x 1 5⁄8 in
GBCH
Solder ODF
Solder ODF
6 mm x 6 mm
10 mm x 10 mm
12 mm x 12 mm
16 mm x 16 mm
18 mm x 18 mm
22 mm x 22 mm
¼ in x ¼ in
⅜ in x ⅜ in
½ in x ½ in
⅝ in x ⅝ in
¾ in x ¾ in
⅞ in x ⅞ in
Butt weld
Butt weld
28 mm x 28 mm
35 mm x 35 mm
42 mm x 42 mm
-
GBCT
Solder ODF
Solder ODF
-
¼ in x ¼ in
⅜ in x ⅜ in
½ in x ½ in
⅝ in x ⅝ in
¾ in x ¾ in
⅞ in x ⅞ in
1
1
⁄8 in x 1 1⁄8 in
1
3
⁄8 in x 1 3⁄8 in
1
5
⁄8 in x 1 5⁄8 in
2
1
⁄8 in x 2 1⁄8 in
Shut-o ball valve, type GBC, GBCH and GBCT
Connections
Standard GBC, GBCH, GBCT versions can be provided with straightway, connection types solder ODF or butt weld in
a wide variety of connection sizes. Solder ODF versions are with extended ends copper connections, butt weld
versions with stainless steel connections.
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have
some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local
Danfoss representative if you have any questions.
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