Danfoss R744 Shut-off Ball Valve Installation Guide
- June 12, 2024
- Danfoss
Table of Contents
ENGINEERING TOMORROW
Installation guide
Shut-off ball valve
Type GBCT
R744 Shut-off Ball Valve
Refrigerant: R744 (CO2)
Temperature range (TS): -40 °C – 149 °C / -40 °F – 300 °F
Max. working pressure (PS/MWP): 140 bar / 2031 psig
CAUTION – RISK OF HIGH PRESSURE
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.
Warning: Applicable to A1, incl. R744, refrigerants as accepted by Danfoss
excluding R717 and to noncorrosive gases/liquids dependent on sealing material
compatibility.
The design pressure shall not be less than the value outlined in Section 9.2
of ANSI/ ASHRAE 15 for the refrigerant used in the system. Only authorized
persons are allowed to operate this valve, as closing can cause build-up of
excessive pressure in the system. For the application use with R744 as part of
a secondary loop or cascade system should refer to the datasheet for more
attentions.
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. The ball valve will only internally seal in closed position
when flow direction is from HP to LP.
Remove cap and access cap (if present)
Opening valve
| Valve size | Max. Operating Torque |
|---|---|
| Nm | ft-lbs |
| GBCT 6 – 17 | 5 |
| GBCT 18 – 22 | 7 |
| GBCT 27 – 28 | 9 |
| GBCT 34 – 35 | 11 |
| GBCT 42 | 15 |
| GBCT 48 – 60 | 34 |
AN300842286530en-000203 | 2
© Danfoss | Climate Solutions | 2023.04
Info for UK customers only: Danfoss Ltd., 22 Wycombe End, HP9 1NB, GB