Single Passage Rotorseals
One passage for air (or another medium, with factory approval) into a rotating shaft. Ball bearings run between the stationary and rotating parts, and the units are lubricated for life.
Types AA2, B3 and C2
Threaded-shaft rotorseals for most medium-volume single passage applications, including Airflex clutch and brake air supplies. A lapped seal face on the rotating shaft runs against a spring-loaded carbon seal ring. Standard and high pressure versions. Maximum operating temperature 220°F (104°C). The B3 is the direct replacement for the discontinued B2.
| Type | Inlet port | Mounting thread | Standard: part no. / max rpm / max psi | High pressure: part no. / max rpm / max psi | Repair kit |
|---|
| AA2 | 1/8 NPT | 3/8-24 | 145631E / 4,000 / 150 | 145631T / 1,000 / 1,000 | 145631X |
| B3 | 3/8 NPT (1/4 NPT adapter) | 5/8-18 | 145106BQ / 4,000 / 150 | 145106BV / 600 / 1,000 | 145106X |
| C2 | 1/2 NPT | 1-14 | 145107BG / 3,000 / 150 | 145107BK / 400 / 1,000 | 145107X |
Type RH
For large air volumes. A flanged design that bolts to the machine shaft or assembly, with external NPT threads on the inlet shaft. A lip seal rotates against a polished stationary shaft. Maximum operating pressure 150 psig (10.4 bar).
Internal Rotorseal
For machines where axial length is critical and there is no room for an overhung rotorseal. Same internal design and components as the single passage rotorseals, with 1/8, 3/8 and 1/2 in. ports.
Pressure and speed limits are from the Airflex installation manuals. Avoid running at maximum pressure and maximum speed together.
Dual & Triple Passage Rotorseals
Two (or three) separate passages through the same shaft end, for dual-clutch drives or for supplying air and coolant together.
| Type | Description | Assembly | Seal kit |
|---|
| AD | 1/4-18 inlet port for each passage; both outlets can discharge into the shaft end. Inner passage nose sealed by a pair of O-rings, outer passage by a compression grommet. | 145785C | 145785X |
| ADP | Attaches with a 1-11 1/2 threaded outlet instead of a mounting flange. Inner passage port on a flat of the hex mounting nut. | Ask us | Ask us |
| BD | Like the AD with a larger mounting flange. Inner passage sealed with a flat rubber washer in a counterbore. High pressure versions available. | 145405T | 145405X |
| FDA | Similar to the BD with larger passages: 1/2-14 inlet and flange outlet ports. | 145583AJ | 145583X |
| RD | For actuating and cooling fluids: mineral oil, water and air. Non-metallic seal ring held by a light spring. | Ask us | Ask us |
| BTA | Triple passage rotorseal. | 145579R | 145579Z |
Parts, Kits & Rebuilds
When a rotorseal starts leaking after long service, it can usually be restored with a genuine Airflex replacement kit (spring, spring stop, O-ring and carbon seal for the AA2, B3 and C2). Gordon Russell stocks rotorseal assemblies, kits, housings, shafts and bearings, and rebuilds Airflex rotorseals in our shop along with the clutches and brakes they feed. Always connect the rotorseal through a flexible hose: a rigid connection preloads the bearings and shortens their life.
See every Airflex rotorseal part in the Airflex Parts Finder →
More power transmission: All Power Transmission | Industrial Gearboxes | Industrial Clutches & Brakes | Industrial Couplings | Gear Pumps | Rotorseals
