Danfoss AI300841064527en-000201(DKRCC.PD.FB0.G1.02)_GBCT Datasheet
Summary
This reliable shut-off ball valve is engineered specifically for transcritical R744 (CO2) high-pressure refrigeration systems, safely handling pressures up to 140 bar. Built with robust materials and designed for use across a wide temperature range (-40°C to 149°C), it ensures reliable operation when controlling refrigerant flow. Documentation provides technical specifications, installation guides, dimension charts, and crucial safety information needed by HVAC professionals and engineers designing or servicing advanced CO2 refrigeration equipment.
Page 1 Text Content
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 Designed for transcritical CO2 systems Rupture proof, internally-loaded spindle
Maximum working pressure (PS): design ensures safe operation under extreme 140 bar / 2031 psig pressures Temperature range (TS): Specially-selected sealing material for CO2 -40 °C – 149 °C / -40 °F – 300 °F refrigerant UL/c UL Listed, complies with Pressure Reinforced copper-iron tube extensions Equipment Directive 2014/68/ EU permit trouble-free valve installation with Full port construction to match line size traditional torch-brazing methods
Bleed hole design avoids liquid entrapment when valve is closed
AI300841064527en-000201 | 1© Danfoss | DCS (bh) | 2019.10
Page Summary Contents For Danfoss AI300841064527en-000201(DKRCC.PD.FB0.G1.02)_GBCT Datasheet
Manual Details
| Brand | Danfoss |
|---|---|
| Pages | 4 |
| File Size | 854.36 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What refrigerants are the GBCT valves designed for?
They are specifically designed for R 744 (CO2) in transcritical refrigeration systems.
Is this device suitable for high-pressure CO2 applications?
Yes, it is designed for transcritical CO2 systems and features a maximum working pressure of 140 bar / 2031 psig.
How does the installation process handle line size connection?
It uses full port construction to match line size, eliminating the need for traditional torch-brazing methods.
Are there any warnings when operating with CO2?
Do not close the valve when the CO2 liquid temperature is below ambient. It must also be installed with a pressure relief valve set at or lower than its rated pressure.