Capacity: Capacity is dependent on four things:
- The volume of the pump. The shorter the pump the lower the capacity.
- Level of liquid above the intake – as it fills under gravity the higher the column of liquid above the intake the quicker it will fill. Therefore a bottom fill pump will pump more than a top filling pump.
- Speed of vent – the liquid can only enter the pump as it displaces the air inside. The faster it can vent the faster it can fill. Having too small a vent pipe will restrict the speed of vent and is more critical in deep installations where it has to vent to atmosphere (typically landfill applications). Under most applications 8mm internal diameter tubing is adequate.
- Speed of emptying – if the pump empties quicker it can refill quicker and is affected by the following:
Discharge pipe diameter - using an internal diameter that is too small will restrict the flow of liquid being emptied from the pump
Air flow - using an air supply pipe with an internal diameter that is too small will restrict the flow and velocity of air entering the pump.
Air pressure – the higher the air pressure the quicker the liquid will be displaced. However if the air pressure is too high this will have a negative effect. For optimum flow it is recommended that the air pressure be 2 bar above the TDH (total dynamic head.
(See data sheet for recommended air, vent and discharge pipe sizes)
Diameter: GeoPumps are designed to go in the following well diameters:
GP2 – 2” (50mm) internal diameter
GP3 – 3” (75mm) internal diameter
GP4 – 4” (100mm) internal diameter
Bottom filling - Liquid enters through a large intake screen mounted on the base of the pump and is typically known as a 'bottom loader'. Typical applications - landfill leachate and condensate and dissolved and/or sinkers (DNAPL)
Top filling – liquid enters through a smaller intake screen mounted on the top of the pump and is typically known as a 'top loader'.
Chemical resistance: Made from stainless steel, Teflon and PUR the GeoPump has been designed to withstand landfill leachate and condensate and most hydrocarbons found within groundwater remediation. However certain mixtures of chemicals may have a detrimental effect and if there is any information on chemicals present they should be given to Geosense to check suitability.