DEMAC range · Quotations and technical advice on request

Home›Rotary unions, slip rings and sensors›GR-4 rotary unions — 4 hydraulic lines, 240 bar

GR-4 rotary unions — 4 hydraulic lines, 240 bar

GR-4 four-line rotary unions, 240 bar and 180° rotation. Three part numbers in 3/8 or 1/2 inch, with different mounting drawings.

Number of lines
4 hydraulic lines
Hose diameter
3/8" - DN 10 to 1/2" - DN 13
High pressure
Up to 240 bar
GR-4 rotary unions — 4 hydraulic lines, 240 bar | DEMAC

Technical specifications

Technical specifications

Product type

Rotary union

Number of lines

4 hydraulic lines

Application

High-pressure hydraulics, Mobile machinery and cranes, Oil

Pressure

240 bar

Hose diameter 3/8" - DN 10, 1/2" - DN 13
ATEX zone

No

Technical drawings View technical drawings

The rotary unions GR-4 have four hydraulic lines. The three part numbers in the section are rated for 24 MPa, equivalent to 240 bar, and a rotation of 180°.

For a known part number or a replacement

  • Full part number, photographs of the union and fittings.
  • Flow rate and pressure per line, fluid and angular travel.
  • Available length and mounting drawing, particularly for the /L variant.

GR-4 part numbers

GR-4 rotary unions — part numbers and lengths
Model Lines / connections Rotation Overall length mm
GR 4.10 4 × 3/8" 180° 230
GR 4.10/L 4 × 3/8" 180° 264
GR 4.12 4 × 1/2" 180° 246

Versions GR 4.10 and GR 4.10/L have Ø 8.5 mm holes and different layouts. The distances between the two holes of a lug are 45 and 50 mm respectively on the drawings; check all mounting dimensions.

For two-line part numbers, see the data sheet GR-2. GR-4 specifications are not general limits for all DEMAC multi-line rotary unions.

Unsure about the part number?

Tell us the number of ports, pressure and flow rate, rotational speed and working angle.

Request a quote

Product:

Enter your part number, quantity or required specifications. Fields marked * are required.

Enquiry type *
Your requirements *
If you know the part number, provide the full code and quantity. For a replacement, send the information available: serial number, a clear photo of the nameplate, and a view of the reel and its installation. The serial number is required for certain identification; if it cannot be found, submit your enquiry anyway and see the illustrated locations on the Contact page. For a new configuration, specify the number of hoses or cables, usable length and available technical data. Tell us what you know; we will help you complete the details.
Company
Name
Email address *
Telephone
Attach a file
Maximum file size: 10 MB
For a replacement, if possible attach a clear photo of the label showing the serial number, plus a view of the reel or its installation. If the number cannot be found, send the photos, drawing or part number available; your enquiry can be assessed and completed afterwards. Up to 3 files, maximum 10 MB per file.

Open the form on the Contact page

Call us