KB Results

Can fluid flow in both directions of a rotary union?
Yes. An example is an air chuck being inflated and deflated thru the same rotary union.

Can more than one fluid be transferred thru one rotary union?
Yes, by the use of a multi port union.

Should I use a right hand or left hand threaded rotary union?
The rotary union should self- tighten when the component rotates (This does not mean you shouldn’t tighten the union upon installation).

When do I need a rotary union?
When rotating components need a stationary pressurized supply of fluid.

What does a rotary union do?
Allows for transfer of a stationary supply of pressurized fluid to rotating components

Where does a rotary union go?
Between the stationary and rotating components. At the end(s) of a shaft or drum Over a shaft or drum

What fluids can a rotary union transfer?
Air Hydraulic Fluid Water Coolant Brake Fluid Hot Oil Steam

How much rotating resistance does a rotary union add?
Resistance is relatively negligible for end mounted balance seal design. Resistance must be considered for over the shaft mounted.

Can more than one rotary union be used on one rotating component?
Yes. They may be mounted on opposing ends.

Should I use a left hand or right hand threaded rotary union if my component rotates in both directions?
Choose the primary direction for thread selection. Additional securing methods may be required to prevent loosening in certain applications.

Should I use an air gun, valve, switch assembly or solenoid valve to inflate my air chuck or shaft?
Air guns and valves are for manually inflating and deflating core chucks Switch assemblies and solenoid valves are for automated inflation and deflation of core chucks. A rotary union must be used