Step Lock Piston Seal

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The White Paper

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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.


		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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