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Unlike any other design, these unique Passive
Skimmers can be upgraded to fully automatic, active Product Only Recovery
Systems. They are designed to recover free-floating hydrocarbon from any
depth down to a sheen (0.25mm) without the need for any power source. The
floating intake head follows water table fluctuations. Passive Skimmers include versions
for 2-inch (50mm) and 4-inch (100mm) diameter wells, and Tidal Passive
Skimmers with extra long strokes are available for sites with high and low
tide considerations.
Passive Skimmers consist
of four main items: a Floating Intake Head, Guide Rod & Flexible Tube, a
Well Centering Disk, and a Clear Product Canister.
Operation
The skimmer is lowered
into the well until the midpoint of the skimmer's travel is located at the
fluid level in the well. The support rope is tied off holding the skimmer
at a specific depth and the skimmer is left in the well to collect
floating hydrocarbons.
A floating intake head follows water table fluctuation. Hydrocarbon first
enters the skimmer through the floating intake's outer debris screen and
then an inner oileophilic hydrophobic screen, down through a flexible,
yellow tube, and into the see-through canister.
To empty the skimmer, it is pulled to the surface and the canister is
drained using the valve at its base. The skimmer is returned to the well
until next checked at its predetermined maintenance interval.
Available with two Passive Floating-Intake Skimmers:
- SOS-P for product
with low viscosities - it will reduce product lense to a sheen.
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The
Selective Oil Skimmer (SOS) should be used under the following
conditions: