Deublin multi-passage unions
Several Supplies Through One Union
A multi-passage union keeps two or more supplies – hydraulic oil, air, coolant, vacuum – apart inside one union, so a single turning shaft can do several jobs.
- 2 to 8passages
- 140 barmax. pressure
- 12,000 rpmmax. speed
- 29 unionsin the finder
The range
Multi-Passage Unions
1379 / 1479 4-Passage
Four passages for oil, water, air and vacuum.
- 6 parts
- DN 10–15
- up to 60 bar
- up to 80 °C
- up to 250 rpm
2620 Series 2-Passage
Two passages – for example hydraulic clamping and air.
- 14 parts
- up to 140 bar
- up to 71 °C
- up to 12,000 rpm
2630 / 2640 / 2650 Series
Three, four or five passages for machine tool spindles.
- 9 parts
- up to 140 bar
- up to 71 °C
- up to 10,000 rpm
Multi-Passage Soft Seal Unions
Custom unions with polymer seals, for slow and intermittent rotation such as indexing tables.
- Engineered to order
High-Speed Multi-Channel (260x) & Hybrid Unions
3 to 8 passages at speed, and hybrid unions to 200 bar.
- Engineered to order
Why Deublin multi-passage unions
More Done Through One Shaft
Separate Passages
Each supply has its own seals, so media never mix.
Less Pipework
One union replaces several, saving space at the end of the shaft.
Built to Order
Deublin designs special multi-passage unions for each machine.
Soft-Seal Option
Soft-seal unions suit slow or stop-start turning, like indexing tables.
How to choose
Four Questions to Pick a Multi-Passage Union
How Many Supplies?
Count the separate media – each needs its own passage.
What’s in Each One?
List the media and pressure for each passage.
How Does It Turn?
Continuous high speed, slow, or stop-start indexing.
Standard or Special?
Many machines need a made-to-order union – send us the details.
How it works
How Multi-Passage Unions Work
A multi-passage union has a separate passage, with its own seals, for each supply – so oil, air and coolant can all go through one shaft without mixing.
Four Passages
Each passage has its own port. A vent between passages 2 and 3 lets two different media be used without cross-contamination. The drawing shows the shaft end the union fits.
Two Passages
Flange-mounted two-passage unions carry, for example, clamping hydraulics and air through a machine spindle.
Up to Five
Three to five passages, each for air, coolant, oil or a drain.
Maximum pressure, temperature and speed are the series limits and can’t all be reached at once. Check the catalogue page on each union, or call Norman G Clark before ordering.
Literature & related
More Information
- General Industry catalogue – 4-passage (p. 31)
1379 and 1479 Series - Machine Tool catalogue – multi-passage (p. 29)
2620, 2630, 2640 and 2650 Series
Not Sure Which Union You Need?
Tell us what the machine has to do – the load, the speed, how often it runs and the space you have – and we’ll help you choose the right Deublin product.