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Internal Rotorseals
Applications may arise where axial length is critical and space not available for an overhung rotorseal. If the shaft is of sufficient diameter, it may be possible to insert the rotorseal into the shaft end as shown in the figure at the right. The internal design and components are the same as those used in the single passage rotorseals.
Unit of Measure

Specifications

Size

 N/A C2

Dimension D

 N/A 4.84 in123 mm

Dimension D1

 N/A 3.00 in76 mm
Dimension D41 N/A 2.312 in58.7 mm

Dimension D48

 N/A 0.50 in13 mm

Dimension D54

 N/A 0.31 in8 mm

Dimension D55

 N/A 0.25 in6 mm
Dimension H2 N/A 3.061 in77.7 mm

Dimension H1

 N/A 2.44 in62 mm

Dimension M

 N/A 0.56 in14 mm

Dimension O

 N/A 0.38 in10 mm

Dimension P

 N/A 1.31 in33 mm

Passage Area

 N/A 0.307 in²1.98 cm²

Weight

 N/A 3 lb1.4 kg
Maximum Speed3 N/A 3000 rpm
Maximum Pressure4 N/A 150 psi10.4 bar

Hex Size

 N/A 1.38 in35 mm
Dimension A5 N/A 3.063 in77.8 mm

Manufacturer

 N/A Eaton-Airflex

Note

N/A 1/2-14 American National Pipe Thread female port.

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.

For applications which demand a large flow, single passage rotorseal, the RH (rotating housing) type provides a solution. This design incorporates a mounting flange for attachment to the machinery shaft or assembly. External American National Pipe Threads are provided on the rotorseal inlet shaft to facilitate supply line connections.

  • 1 Tolerance +0.000/-0.005 in (+0.00/-0.13 mm)
  • 2 Tolerance +0.000/-0.002 in (+0.00/-0.05 mm)
  • 3 Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters.
  • 4 Operation at maximum pressure and speed should be avoided. Refer to K-14 for operating parameters.
  • 5 Shaft counterbore diameter. Tolerance +0.002/-0.000 in (+0.05/-0.00 mm)