Danfoss GBCT 6s, GBCT 54s Installation guide

Installation guide

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Shut-off ball valve

Type GBCT 6s to GBCT 54s

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 all common non-fl ammable refrigerants, excluding R717 and to noncor-

rosive 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 second-

ary 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.

HIGH PRESSURE SIDE

“ HP”

LOW PRESSUR E SIDE

“LP ”

Remove cap and access cap (if present)

Opening valve

Danfoss

9G8045

r

© Danfoss | DCS (bh) | 2019.10

Valve size

6s - 16s 5 4

18s - 22s 7 5

28s

35s

42s

54s

Max. Operating Torque

Nm ft-lbs

9 7
11 8
15 11
34 25

AN300842286530en-000102 | 1

s

9G8047

Danfoss

G

D

D

OPEN Position CLOSED Position

Danfoss

Danfoss

9G8046

Danfoss

Danfoss

90 bar
psig

90 bar
psig

Brazing (Copper and Copper alloy)

Danfoss

9G156.14

Min. 5% Ag

Max. 149 °C / 300 °F

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

6s - 16s 4-5 3-4
18s - 22s 7-8 5-6
28s - 42s 18-20 13-15

54s 54-61 40-45

Recommended Torque

Nm ft-lbs

© Danfoss | DCS (bh) | 2019.10

Fully open Fully closed

AN300842286530en-000102 | 2