ACTUATORS
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ACT-03
For further information www.norgren.com
IMI Norgren Ecology Seal - How Does it Work?
The Ecology seal is a Nitrile material and designed for two functions.
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.
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 exhausting
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 non-compressible, 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.
NFPA Series A Aluminum & J Steel Cylinders
1-1/2 to 12 inch bore size
