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The White Paper

To view the White Paper as web pages click Here.

To view the White Paper as a PDF click Here.

For additional design information click Here.

Step Lock Piston Seal

   Designed for 7,000 psi (480 bar) working pressure and pressure spikes to 20,000 psi (1380 bar). Our seal was developed for excavator attachment cylinders when no existing seal would meet our 1 year, 2000 hour minimum performance requirement. This patented (5,934,658) design has more than double the life compared to any other seal tested.

Step Lock Piston Seal

Features

* Our piston ring is machined from moisture stabilized bearing grade nylon.

* Steps of the piston ring are wider than ring and fit tight in the groove, for excellent low pressure sealing.

* Expander and piston ring fill the groove volume by over 90% to eliminate explosive decompression of the expander ring when dropping from maximum pressure quickly.

   The quick ship sizes listed below are usually in stock and can ship the same day if ordered before 2:00 pm Pacific time. The short lead time items are made to order and will take 1 to 2 weeks to manufacture.

Quick Ship Sizes

Seal Part No.

Bore

Groove Width

Groove Diameter

SL0000

3.525-3.528

.279-.281

2.966-2.968

SL0017

4.000-4.003

.279-.281

3.441-3.443

SL0003

4.025-4.028

.279-.281

3.466-3.468

SL0040

4.025-4.028

.281-.283

3.477-3.479

SL0009

5.025-5.028

.279-.281

4.466-4.468

SL0043

5.025-5.028

.375-.377

4.255-4.260

Short Lead Time Sizes

Seal Part No.

Bore

Groove Width

Groove Diameter

SL0015

3.500-3.503

.279-.281

2.941-2.943

SL0028

3.500-3.503

.578-.580

3.019-3.021

SL0031

3.525-3.528

.578-.580

3.044-3.046

SL0023

4.000-4.003

.578-.580

3.519-3.521

SL0026

4.025-4.028

.578-.580

3.544-3.546

SL0006

4.525-4.528

.279-.281

3.941-3.943

SL0019

5.000-5.003

.279-.281

4.441-4.443

SL0033

8.040-8.043

.749-.751

7.305-7.307

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Last updated on 3/16/10