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Walkersele® OSJ-2

Description
Walkersele^® OSJ is James Walker's patented and highly successful technique for the On-Site Joining of split-type Walkersele radial lip seals.

For many years, on-site vulcanising was the only answer to split-seal assemblies where leakage was unacceptable. But this process could prove expensive, as it needed a high level of skill and elaborate jigs. So we developed Walkersele^® OSJ.

Since the introduction of Walkersele^® OSJ in 1992, rotary seal replacement has come 'full circle' to form a full circle again.

After a few hours of hands-on training, a maintenance fitter is able to produce a securely bonded seal that provides a split Walkersele^® with the integrity of a fully moulded endless seal.

The many benefits of Walkersele^® OSJ include:

High performance - installed units provide the sealing performance of high-integrity endless Walkerseles.
Wordwide proven - on marine propulsion systems, gearboxes, power stations, sugar refineries, etc...
Cost effective maintenance - the performance and integrity of an endless-type seal is achieved without major plant strip-down and without exspensive on-site vulcanising.

Walkersele^® OSJ-2
In consultation with longterm OSJ^® customers, we have modified the installation kit to make it easier and more efficient to use under arduous maintenance conditions and at large diameters.

With Walkersele^® OSJ-2, you get exactly the same top-quality lip seal and high-integrity jointing system as with our original Walkersele^® OSJ system. Improvements include:

New user-friendly clamping band with finer tension control.
Redesigned jig to provide a more positive location of seal joint.
Improved temperature indicator.
Availability in larger diameters.

Your on-site joining kit
Every Walkersele^® OSJ-2 kit contains the following:

The correct Walkersele^® as specified. This seal is specially adapted at joint interface for OSJ^® installation.
Steel clamping band.
Joining jig - precision moulded in synthetic elastomer.
Nut-driver to adjust clamping band.
Temperature indicator with self-adhesive backing.
Two-part epoxy adhesive in sachet. This adhesive cures to semi-rigid state. (Note: hot air gun is needed to cure this adhesive).
Degreasing cloth, abrasive stick, adhesive applicator brush, and emery paper with self-adhesive backing.
Full step-by-step instructions.

Fitting procedure

Stage 1: Apply epoxy adhesive to joint faces of Walkersele^® OSJ.

Stage 2: Align joint in moulded jig.

Stage 3: Clamp into position with steel band.

Stage 4: Cure epoxy adhesive with hot air gun.

Seal avaliability
Profiles: Walkersele^® OSJ-2 is supplied in all Walkersele^® designs that incorporate seal backs moulded from rubberised fabric. These are Walkerseles D6, D6/DL, D7, D5, D1 and D1/DL.

Materials: Walkersele^® OSJ-2 is supplied in three elastomer types: nitrile (NBR); hydrogenated nitrile (HNBR) including our Elast-O-Lion^® and Ultraglide reformulated-HNBR grades; and fluorocarbon (FKM).

Temperature limit: This is dependent on the seal material. However, it should be noted that the bonding technique imposes an upper limit of 150°C on the seal.

Sizes: Seals are readily supplied for shaft diameters from 60mm to 2000mm. When considering diameters outside this range, please contact our Technical Services Team for advice.

Performance envelope: Please discuss exact details of media compatibility, pressure, temperature and surface speed with our Technical Services Team, before placing an order, if you need further guidance.

OSJ^® training
Successful application of our Walkersele^® OSJ technique relies on careful adherence to all stages of the joining procedure - as laid down in the full fitting instructions supplied with each kit.

We recommend that first-time users attend one of our hands-on training sessions that can be carried out at your premises or one of our sites. For details, please contact our Technical Services Team, or your local James Walker distributor.