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State-of-the-art rotating unions

24-05-2011
by 
in 

Rotating Unions are used in many manufacturing processes to cool, heat or transfer fluid (pneumatic or hydraulic) power.

Typical rotating unions feature deep groove ball bearings to support the rotating component against the stationary component and balanced, precision-engineered mechanical seals to seal the media flow.

Deublin rotating unions vary for each application, depending on design, bearing type, construction and material required.

The entire Deublin product range, available from Norman G Clark, is manufactured at the cutting edge of technology from the very first drawing to the final production.

Modern CNC machining centres transform highest quality materials into precision components.

Once assembled every rotating union is dynamically pressure tested for leakage as part of the final inspection procedure prior to despatch.

A rotating union must be capable of containing very high pressures while rotating at very high speeds. Smooth, easy rotation can only be achieved by exactly matting the seal faces to minimise friction.

All Deublin seals have a surface finish of 4 RMS and are micro-lapped to an optical flatness of better than 2 light bands or 0.000023” for dependable, leak-proof operation.

Seals are then enclosed in housings that are machined on CNC turning machines to provide essential part-to-part precision.

The greater the pressure on a rotating seal face, the greater the friction, torque and wear on the union.

That’s why Deublin Rotating Unions feature “balanced” mechanical seals. With this technology the thrust load or seal face contact pressure is kept to a minimum regardless of media pressure.

This reduces wear, resulting in longer seal life. The spring-loaded seal is keyed so that it cannot rotate or creep, which can cause premature failure in secondary seals resulting in a leaking union.

Norman G Clark (A/Asia) Pty Ltd
Ph: 03 9450 8200

www.ngclark.com.au

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