Danfoss GBCT 6s Shut Off Ball Valve Installation Guide
- June 15, 2024
- Danfoss
Table of Contents
ENGINEERING
TOMORROW
Installation guide
Shut-off ball valve Type GBCT
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 |
| OPEN Position | CLOSED Position |
| --- | --- |
| 
Brazing (Copper and Copper alloy)| Welding (stainless steel)
|
Install valve core (if present) and cap
Install valve
core with approx. torque 0.3 Nm / 0.2 ft-lbs
Tighten cap
Tighten the cap with approx. torque
| Valve size | Recommended Torque |
|---|---|
| Nm | ft-lbs |
| GBCT 6 – 17 | 5-Apr |
| GBCT 18 – 22 | 8-Jul |
| GBCT 27 – 42 | 18-20 |
| GBCT 48 – 60 | 54-61 |
| |
---|---|---
| |
009R8519
Info for UK customers only: Danfoss Ltd.,
22 Wycombe End, HP9 1NB, GB
© Danfoss
Climate Solutions
2023.04
AN300842286530en-000203
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