The section GR-2 comprises seven two-line hydraulic rotary unions: GR 1, GR 5 and GR 2. The stated maximum pressure is 24 MPa, equivalent to 240 bar ; the rotation angle depends on the part number.
To identify a replacement
Full part number, photograph of the union and its fittings.
Angular travel, fluid, working pressure and flow rate.
Dimensions, holes and mounting centre distances.
Part numbers and dimensions
Two-line rotary unions in the GR-2 section
Part number
Lines / connections
Rotation
Overall length mm
Stated hole diameter mm
GR 1.06
2 × 1/4"
270°
82
Ø 11
GR 1.10
2 × 3/8"
270°
82
Ø 11
GR 1.19
2 × 3/4"
270°
105
Ø 11
GR 5.06
2 × 1/4"
270°
71
Ø 11
GR 5.10
2 × 3/8"
270°
71
Ø 11
GR 2.10
2 × 3/8"
360°
136
Ø 8,5
GR 2.12
2 × 1/2"
360°
123
Ø 11
Dimensions A to D of the GR 1 / GR 5 drawing
Part number
A mm
B mm
C mm
D mm
GR 1.06
32
40
74,5
82
GR 1.10
32
40
74,5
82
GR 5.06
27
29
63,5
71
GR 5.10
27
29
63,5
71
Dimensions A to D denote different measurements on the drawing: C must not be equated with overall length D. For an exchange, compare the complete drawing and connections, not just the number of lines.