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The Agony of Choice
As hydraulic technology has evolved and levels of performance have risen, the manufacturers of hydraulic units have always used the best seal geometry available with each development milestone. Seal geometries were dependent on the materials available at any given time.
Today we are confronted accordingly by a multiplicity of geometries, shapes and materials which have simply been retained for historical reasons but are still specified by various equipment manufacturers.
Since the development of DEPAC's Red and Purple Super Polymers, this confusing array of materials and seal lip geometries is no longer necessary from the technical point of view.
Choice can now be reduced to the one logical geometry of a sealing lip thanks to the superior properties of these Super Polymers in terms of strength, lubricity, resistance to extrusion and simultaneous retention of unsurpassed flexibility. The geometry of the cambered (acute) positively formed lip allows it to slide like a snow plow over the surface of the cylinder or rod, lifting all solids from the surface and away from the medium where they could otherwise cause damage and lead to premature failure. This is of paramount importance for wipers.
Using DEPAC's Red or Purple Super Polymer it is possible to replace practically 99% of today's seal geometries with just three standard types: Type DGS 6p as rod seal, Type DPK 6cp as piston seal, and for example DWA 2p as wiper.
Type DOR 1-3 O-rings are also used with outstanding results thanks to the excellent extrusion resistance of DEPAC's Red and Purple Super Polymers.
| Type DGS 6 p rod seal Type DPK 6cp piston seal |
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| Type DWA 2p wiper |
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