QED Passive Skimmers

Passive Skimmers have been designed for product-only (LNAPL) recovery applications in sites where active pumping systems are not applicable due to existing conditions or extreme low permeable formations. The floating intake head follows the groundwater fluctuations in the recovery well, allowing only the free-floating phase (LNAPL) to be captured without taking water and stored in the built-in reservoir for further manual transfer to a tank.

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Key Features

  • Available for 2” (50 mm) and 4” (100 mm) extraction wells, with different reservoir capacities
  • SOS-P (Passive Selective Product Skimmer)

    • Reduces product level to a sheen
    • Floats on product water interface
    • Centering disks prevents float from contacting sidewalls of well
  • SPG-P (Passive Specific Gravity Product Skimmer)

    • Viscous products 200-1000 Centistokes
    • Hydrocarbon has a specific gravity less than .85
    • Floats slightly above product-water interface

QED Passive Skimmers

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+64 (0)3443 5326 Call Van Walt
+27 21 518 1347

QED Passive Skimmers Equipment Options:

Benefits

  • Simple systems for extreme low recovery applications
  • Choice of floating inlet types
  • Multiple Canister sizes
  • Stainless steel product recovery canisters

Specifications

Model No.
2 in. SOS – 301079
2 in. SOS – 301080
4 in. SOS – 301032
4 in. SOS – 301033
Canister Volume
600 cc
900 cc
3,000 cc
6,000 cc
Well Diameter
5 cm
5 cm
10 cm
10 cm
Float Travel Range
30 cm
30 cm
46 cm
46 cm
Overall Length
165 cm
194 cm
177 cm
217 cm
Maximum Fluid Depth Required
98 cm
128 cm
95 cm
137 cm
LNAPL Fluid Density
< 1.0 SG
Kinematic Viscosity @ 50 ˚F (10 ˚C)
200 centistokes
Recommended Initial LNAPL Layer
> .64 cm
Residual LNAPL Layer
Sheen
Suitable Types of LNAPL
Gasoline, jet fuel
Materials
Stainless steel, Viton®, PVC, brass, closed cell foam.
Measurement principle
Ultrasonic cross correlation (flow velocity)
Hydrostatic (depth measurement)

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+44 (0) 1428 661 660 +64 (0)3443 5326 +27 21 518 1347