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Multiport Rotary Union Pneumatic – simultaneous transmission of air, gas and vacuum
The LT Series multiport pneumatic rotary unions are available with 2, 4, 8, 12 and 24 passages. They are designed for use with air, gas and vacuum and are ideal for many automation and robotic applications. These lightweight and compact rotary joints feature aluminum construction and independent flow passages that can transfer different types of media simultaneously. All models in this rotary union series come standard with threaded connections on the radial sides of the shaft and housing. The models are also available with axial O-ring face seal glands (version OF) on the rotor side for flush mounting on an interface. You can easily combine these multiport unions with electrical power and/or data signals. They are designed to easily integrate our miniature and Ethernet slip rings.
What is a Rotary Union?
A rotary union, rotary transmitter or rotary joint is a mechanical assembly used to transfer media such as air, gases, oil, water, steam and also viscous substances (under pressure or vacuum) from a stationary inlet to a rotating outlet or between bodies rotating against each other. In this process, fluid connection is maintained as the media are isolated and the transition is sealed. The rotating unions are designed to transmit a wide range of temperatures and pressures for a variety of conditions and environments. In addition, the rotating unions can also have multiple passages and also transmit different types of media simultaneously.
How do I choose the best Rotary Joint for my application?
Tell us about your requirements so we can make a recommendation:
1) Type of media(s) / fluid(s) to be transferred
2) Number of independent flow channels (passages)
3) Operating pressure
4) Operating temperature
5) Operating speed
6) Shaft and housing connection type
7) Flow channel (passage) size
8) Torque & load requirements
9) Duty cycle
Installation & Mounting
Remove the rotary union from the shipping container. Inspect the entire assembly, including all passage connections to make sure that they are clean and no visual damage occurred during transport. If the assembly is a rotary union/electrical slip ring, the electrical slip ring may be packaged separately to protect during shipping. If this is the case, mount the electrical slip ring to the rotating union assembly using the supplied hardware.
RECOMMENDED INSTALLATION PRACTICE:
We do not recommend mounting the rotary union with both the shaft & housing components solidly bolted into place. One of the two components should be mounted in a manner that allows for some movement in the event of misalignment or run-out during rotation. Using only the supply lines or hoses to fi x the stationary component in place is also not recommended. An anti-rotation arm that attaches to the stationary part of the rotary union assembly and rests against part of the equipment framework is recommended.
MOUNTING A ROTARY UNION W/ AN ELECTRICAL SLIP RING:
Make sure the electrical wiring is fixed in place and protected from contact with other components or equipment. Care should be taken to make sure the slip ring area remains clean and dry during use.
SHAFT MOUNTING, O-RING FACE SEAL CONNECTIONS
Make sure the rotary union shaft face & equipment mounting surface is clean and free from dents or chips to insure proper installation. Equipment pilot bore needs to be concentric to the center line of the rotary union shaft to assure proper function. Install face mount O-rings into groove or counter bore in rotating union shaft face. General assembly grease can be used as needed to hold O-rings into place during assembly. Align rotary union shaft with equipment pilot bore and fl ow passages, then insert into place. Bolt assembly into place using tapped holes on the face of the rotating union shaft or purchase an optional shaft flange for help mounting the union.
SHAFT MOUNTING, THREADED PORT CONNECTIONS:
When mounting the shaft using threaded port connections, make sure all fi ttings are properly tightened & pipe thread sealant is used as required. Equipment mounting surface needs to be concentric to the center line of the rotary union shaft to assure proper function. After all fittings are in place, bolt assembly into place using tapped holes on the face of the rotating union shaft or purchase an optional shaft flange for help mounting the union.
If using the housing to secure the union into a piece of equipment, bolt the assembly into place using the tapped holes on the back of the housing or purchase an optional housing flange for help mounting the union.
After rotary union is installed, a dry run is recommended to assure proper mounting of the rotating union assembly. Begin rotation of the equipment, and verify that while rotating at the maximum operating speed there is no visible movement of the rotary union assembly due to misalignment.