High temperature rotary union
DN 25 - 150, 13 bar | DQ series MAIER

Rotary Joints are suitable for thermal oil up to 400°C and for rotational speeds of up to 2000 min-¹. These applications can be found, for example, in coating and laminating plants, in paper, non-woven and textile calendars, in dryers and in rotary reaction vessels.

Chemical reactions in the form of carbonisation and cracking take place if hot thermal oil comes into contact with atmospheric oxygen. The seals will be damaged causing hot oil and oil vapours to escape.

The internationally patented DQ system prevents these effects thus offering unique advantages. Atmospheric oxygen is isolated from the hot oil by a barrier fluid. A cooling unit is used with the DQ and DQT series for cooling the barrier fluid using the same heat transfer medium as in the main circuit. The DQL version does not require a cooling unit since its temperature limit is 250°C.