Special rotating unions

A rotary union is a special and unique product because it must often be capable of containing very high pressures, while rotating at very high speeds and more pressures on the rotating seal face mean more friction, higher torque and more wear.

Stern can supply hydraulic cylinders with standard line of rotary unions. Besides this unions, we manufacture specials to meet individual manufacturers particular needs as follows:

• High speed and high pressure joints: 350 bar and 1200 r.p.m.
• Rotary cylinder with displacement transducer
• Special material and coatings
• Rotary union for multiple ports
• Different port connections
• Different type of fluids
• Others ...