Danfoss GBCT Data sheet
Data sheet
Shut-off ball valve for high pressure
Type GBCT for transcritical R744 / CO2 (140 bar / 2031 psig)
Danfoss shut-off ball valves, type GBCT for R744
(CO2) high pressure are manually operated
shut-off valves for transcritical CO2 refrigeration
systems, in order to open and to shut
off inner flow path by operating the valve
spindle.
The valve structure and materials are designed
and tested specifically for use with CO2
refrigerant. The valves are approved for use in
transcritical CO2 refrigeration systems.
Features y Designed for transcritical CO2 systems
y Maximum working pressure (PS):
140 bar / 2031 psig
y Temperature range (TS):
-40 °C – 149 °C / -40 °F – 300 °F
y UL/cUL Listed, complies with Pressure
Equipment Directive 2014/68/ EU
y Full port construction to match line size
y Rupture proof, internally-loaded spindle
design ensures safe operation under extreme
pressures
y Specially-selected sealing material for CO2
refrigerant
y Reinforced copper-iron tube extensions
permit trouble-free valve installation with
traditional torch-brazing methods
y Bleed hole design avoids liquid entrapment
when valve is closed
AI300841064527en-000301 | 1© Danfoss | DCS (bh) | 2020.03
Data sheet | Shut-off ball valve for high pressure, type GBCT for transcritical R744 / CO2 (140 bar / 2031 psi)
Approvals
Technical data
HIGH PRESSURE SIDE
“ HP”
LOW PRESSUR E SIDE
“LP ”
Refrigerants R 744 (CO)
Oils: POE, PAG
Continuous operating temperature (COT) -40 °C – 149 °C / -40 °F – 300 °F
Design Pressure (DP)/
Maximum abnormal pressure (MAP)
140 bar / 2031 psig
Flow direction bi-flow
Danfoss recommends that 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.
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
capacit y.
Notes: 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
sufficient number of valves having capacity deemed adequate shall be field-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 sufficient 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.
Ordering
GBCT without access port
Type
GBCT 6s
GBCT 10s
GBCT 12s
GBCT 16s
GBCT 18s
GBCT 22s
Size Kv value Cv value Multi pack
[inch] [m3/h] [gal/min] [Pcs. per pack]
1
⁄4 0.9 1.0 30 009L6415
3
⁄8 3.7 4.3 30 009L6416
1
⁄2 5.4 6.2 30 009L6417
5
⁄8 10.4 12.1 30 009L6418
3
⁄4 16.4 19.0 16 009L6419
7
⁄8 23.7 27.5 16 009L6420
Code no.
GBCT 28s 1 1⁄8 42.3 48.9 4 009L6406
GBCT 35s 1 3⁄8 67.1 77.6 4 009L6410
GBCT 42s 1 5⁄8 83.1 96.1 4 009L6411
GBCT 54s 2 1⁄8 171.3 198.0 2 009L6412
GBCT with access port
Type
GBCT 6s
GBCT 10s
GBCT 12s
GBCT 16s
GBCT 18s
GBCT 22s
Size Kv value Cv value Multi pack
[inch] [m3/h] [gal/min] [Pcs. per pack]
1
⁄4 0.9 1.0 30 009L6581
3
⁄8 3.7 4.3 30 009L6582
1
⁄2 5.4 6.2 30 009L6585
5
⁄8 10.4 12.1 30 009L6586
3
⁄4 16.4 19.0 16 009L6588
7
⁄8 23.7 27.5 16 009L6589
Code no.
GBCT 28s 1 1⁄8 42.3 48.9 4 009L6451
GBCT 35s 1 3⁄8 67.1 77.6 4 009L6453
GBCT 42s 1 5⁄8 83.1 96.1 4 009L6454
GBCT 54s 2 1⁄8 171.3 198.0 2 009L6456
AI300841064527en-000301 | 2© Danfoss | DCS (bh) | 2020.03
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