Rotary unions play a vital role in the plastics industry by ensuring the reliable transfer of heating, cooling, compressed air, hydraulic fluid, and other media from stationary pipelines to rotating equipment. Designed for precision, they provide leak-free performance, support continuous machine operation, maintain accurate temperature control, and help achieve consistent product quality with maximum production efficiency.
From casting to moulding, plastic processing depends on precise heating and cooling at every rotating point — a leaking union means an inconsistent part.
Supply heating or cooling media to rotating calender and casting rolls — holding precise surface temperature for consistent film thickness and clarity.
Transfer heating and cooling media to extruder barrels and screws — maintaining stable melt temperature along the barrel during continuous extrusion.
Deliver compressed air and cooling water to rotating mould stations — shaping and setting the part while holding cycle times steady.
Supply hydraulic fluid and cooling water to rotating platens and mould components — supporting precise, repeatable moulding cycles at production speed.
The CARBON series and spares below are specified most often for plastic processing applications. Final selection should be confirmed against your operating pressure, temperature, and RPM.