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Pump on Demand (POD) ™
A remediation pump for sites with limited access to compressed air and/or power.

Remediation Applications
This pump is ideally suited for sites with limited access to compressed air and/or power.  It successfully blends the benefits of a skimmer system with the “Pump on Demand” benefits of a top filling total fluids pump.
Key Benefits
  • The POD skimmer only activates once the pump body has filled with product and therefore uses air (power) only when necessary;
  • Positive displacement action uses equal amounts of air to product pumped (at pressure equal to discharge pressure);
  • This makes it ideal for situations where there is no mains power;
  • Can be used with bottle gas (nitrogen) or liquid nitrogen;
  • Can be fitted to existing DGSI skimmer assemblies.
  • Ideal for LNAPL recovery in 2” wells or greater;
  • Long 90cm tracking range (with skimmer assembly);
Operation
Installed underneath the skimmer assembly just like a Passive Skimmer Canister the pump operates exactly like the SRX Total Fluids Pump with the exception that only LNAPL enters the pump via the inlet on the Skimmer Assembly.  The pump uses an internal float mechanism which responds to the fluid level within the pump body.  As the pump fills with liquid the float rises to activate a mechanical lever which opens the compressed air valve which pressurises the pump and closes the upper liquid inlet valve thus discharging the LNAPL.  As the LNAPL is pumped out, the float falls again to the lower limit, closing the compressed air valve and opening the inlet valves.


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