Products Catalog
The Airflex rotorseal is a rotary union (rotary joint) which permits the transfer of gases or liquids, under pressure or vacuum, into or out of the exposed end of a rotating shaft or body. It was designed primarily for the passage of compressed air or hydraulic fluid to control clutches or brakes. Other applications include the transmittal of cutting fluid to machine tools, lubrication of shaft-mounted components and circulation of oil for cooling systems.
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Single Passage Rotorseals

Single Passage Rotorseals
Single Passage Rotorseals

Single Passage Rotorseals
Single Passage Rotorseals

Single Passage Rotorseals
Single Passage Rotorseals

Single Passage Rotorseals
Single Passage Rotorseals

Single Passage Rotorseals
Description N/A Rotorseal
Standard model 		N/A Rotorseal
Standard model 		N/A Rotorseal N/A High pressure N/A High pressure
Size N/A AA2 N/A B3 N/A C2 N/A AA2 N/A B3
Rotorseal Type N/A AA2 N/A B3 N/A C2 N/A AA2 N/A B3
Number of Passages N/A 1
Inlet Port Thread (O)1 N/A 1/8-27 N/A 3/8-18 N/A 1/2-14 N/A 1/8-27 N/A 3/8-18
Hose Used In All Arrangements N/A 153x261 N/A 318x3 N/A 318x2 N/A N/A
Insulating Coupling2 N/A N/A N/A 153x263 N/A 153x263 N/A N/A
Quick Release Valve N/A N/A N/A 145406DG N/A 145407DG N/A N/A
Assembly with Insulating Coupling N/A N/A N/A 104921 N/A 104907 N/A N/A
Assembly with Insulating Coupling & QRV N/A N/A N/A 104921A N/A 104907A N/A N/A
Mounting Size Thread3 N/A 3/8-24 N/A 5/8-18 N/A 1-14 N/A 3/8-24 N/A 5/8-18
Dimension D N/A 2.81 in71 mm N/A 3.38 in3.70 in86 mm94 mm N/A 4.45 in4.49 in113 mm114 mm N/A 2.81 in71 mm N/A 3.38 in3.70 in86 mm94 mm
Dimension D1 N/A 2.00 in2.31 in51 mm59 mm N/A 2.25 in2.53 in57 mm64 mm N/A 3.00 in3.15 in76 mm80 mm N/A 2.00 in2.31 in51 mm59 mm N/A 2.25 in2.53 in57 mm64 mm
Dimension H N/A 1.38 in35 mm N/A 1.63 in41 mm N/A 2.38 in2.50 in60 mm64 mm N/A 1.38 in35 mm N/A 1.63 in41 mm
Dimension L2 N/A 0.75 in19 mm N/A 0.75 in19 mm N/A 1.00 in19 mm N/A 0.75 in19 mm N/A 0.75 in19 mm
Dimension O4 N/A 0.19 in1/8-27 in1/8-27 mm5 mm N/A 0.50 in3/8-18 in13 mm3/8-18 mm N/A 0.75 in1/2-14 in1/2-14 mm19 mm N/A 0.19 in1/8-27 in1/8-27 mm5 mm N/A 0.50 in3/8-18 in13 mm3/8-18 mm
Dimension O15 N/A 1/8-27 N/A 3/8-18 N/A 1/2-14 N/A 1/8-27 N/A 3/8-18
Dimension U1 N/A N/A 15.3 in389 mm N/A 15.4 in391 mm N/A N/A 15.3 in389 mm
Dimension U2 N/A N/A 1.7 in43 mm N/A 2.3 in58 mm N/A N/A 1.7 in43 mm
Dimension U3 N/A N/A 14.5 in368 mm N/A 14.2 in361 mm N/A N/A 14.5 in368 mm
Dimension U4 N/A 12.5 in318 mm N/A 12.5 in318 mm N/A 12.8 in325 mm N/A 12.5 in318 mm N/A 12.5 in318 mm
Passage Area N/A 0.019 in²0.12 cm² N/A 0.111 in²0.72 cm² N/A 0.307 in²1.98 cm² N/A 0.019 in²0.12 cm² N/A 0.111 in²0.72 cm²
Hex Size N/A 0.625 in15.9 mm N/A 0.875 in22.2 mm N/A 1.375 in34.9 mm N/A 0.625 in15.9 mm N/A 0.875 in22.2 mm
Dimension D2 N/A 0.50 in13 mm N/A 0.50 in13 mm N/A 0.75 in19 mm N/A 0.50 in13 mm N/A 0.50 in13 mm
Dimension M N/A 0.38 in10 mm N/A 0.56 in14 mm N/A 0.69 in18 mm N/A 0.38 in10 mm N/A 0.56 in14 mm
Dimension N N/A 0.16 in4 mm N/A 0.36 in9 mm N/A 0.63 in16 mm N/A 0.16 in4 mm N/A 0.36 in9 mm
Maximum Speed6 N/A 4000 rpm N/A 4000 rpm N/A 3000 rpm N/A 1000 rpm N/A 600 rpm
Maximum Pressure7 N/A 150 psi10.3 bar N/A 150 psi10.3 bar N/A 150 psi10.3 bar N/A 1000 psi69 bar N/A 1000 psi69 bar
General Description N/A The rotating seal is established by a non-metallic sealing ring, held against the rotorseal shaft by a light spring force. The sealing ring is designed so that media pressure acts on both of its ends to minimize the force on the sealing surface.

This design gives positive protection against leakage and compensates for seal wear. Ball bearings are used between the stationary and rotating ports to provide rigidity to the rotorseal assembly and to minimize the running torque.

Rotorseals are available with single, dual and triple passages, in a variety of sizes and designs, to provide the versatility needed to handle most requirements. Single passage rotorseals, in pneumatic installation, can be plumbed with a quick release valve at its inlet port to provide a convenient exhaust.

In most applications, the rotorseal is mounted to the end of a shaft. The shaft is rifle and cross drilled to provide a passageway for the media transmitted. It is important that the rotorseal's axis of rotation be concentric with the rotating member's axis of rotation to minimize rotorseal wobble.

To accommodate eccentricities, a flexible connection must be used between the rotorseal and supply. A rigid connection will tend to preload the rotorseal bearings. The flexible connection should not be installed taut and should include a union and 45º elbow.

The flexible connection should be attached to the rotorseal prior to fastening the rotorseal to the rotating body to avoid seal or bearing damage. The union connection to the supply line is made last.
In most applications, only one fluid is to be transmitted to a rotating assembly. This group of rotorseals will handle most medium volume, single passage requirements. External threads on the seal shaft and standard pipe threads on the inlet port make installations an easy job.
Dimension H2 N/A
Dimension J18 N/A
Dimension L9 N/A
Dimension U5 N/A
Weight N/A 0.4 lb0.2 kg N/A 0.6 lb0.3 kg N/A 2.0 lb0.9 kg N/A 0.4 lb0.2 kg N/A 0.6 lb0.3 kg
Note N/A Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters.
Furnished with 3/8-18 NPT to 1/4-18 NPT reducer bushing. 		N/A Furnished with 3/8-18 NPT to 1/4-18 NPT reducer bushing
Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters. 		N/A Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters. N/A Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters. N/A Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters.
Manufacturer N/A Eaton-Airflex
  • 1 American National Pipe Thread
  • 2 Used to prevent the transmittal of stray electrical eddy current.
  • 3 American National Standard for Unified Screw Threads.
  • 4 American National Pipe Thread.
  • 5 American National Pipe Thread.
  • 6 Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters.
  • 7 Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters.
  • 8 Tolerance +0.002/-0.000 in (+0.05/-0.00 mm).
  • 9 American National Standard for Unified Screw Threads.