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Norgren Ecology Seal - How Does it Work?
The Ecology seal is a Nitrile material and designed for two functions.
Ecology Seal
1) It is a pressure compensating lip-type piston seal and performs as such throughout the stroke.
2) It's a dampening material for superior deceleration of the piston through the final increments of stroke.
ACTUATORS
The air cushion starts the deceleration process. As the cylinder traverses
towards the end of stroke, the exhausting air is free flowing through an
unrestricted passage.
As the cushion spear enters the end cap, it blocks the free flowing path.
The exhausting air is then forced through a very small, controlled orifice.
As the cylinder continues towards the end of stroke, the volume of air
decreases, compressing the exhausing air. The exhausting air compresses
to a high level, providing the deceleration force to slow the cylinder. The
size of this controlled cushion orifice determines the rate of deceleration
generated by the air cushion.
As the cylinder approaches the final stroke, the Ecology seal comes in
contact with the end cap of the cylinder. The Ecology seal material is noncompressible,
however, at full pressure, it is designed to move or deform in
shape to allow the cylinder to achieve full stroke. The force required to
deform this material is the final deceleration force used to bring the cylinder
to a nice, smooth stop.
The Ecology seal also acts as a spring to assist in a quick release out of
cushion as the cylinder initiates the traverse in the opposite direction.
Norgren.com/usa – 303.794.2611 – help@amer.norgren.com
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