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Metering Pump Terms

Air Bound – The situation in which a centrifugal pump is filled with air, which prevents a vacuum from forming. In this case, water will not flow through the pipe.
 
Back Pressure – The amount of pressure a pump is required to overcome to dose at the point of injection, measured in bar.
 
Capacity – The water handling ability of a water pump.
 
Cavitation – A situation in which vacuum pockets form in a pipe, eventually causing the pipe to implode.
 
Dead Head – A situation in which a pump attempts to run against a closed valve or against any other condition preventing discharge.  
 
Discharge Hose – A hose that moves the discharged water from the pipe.
 
Drain Plugs – Plugs that are removable from the pipe, used to drain water during inactivity.
 
Electronic Controller – An entire control system that supplies feedback to the pump to sustain the accurate chemical dosage, which can increase efficiency.
 
Flooded Suction – A condition wherein a pump is located below the liquid being pumped.
 
Flow Switch – A device that supplies a positive indication that the fluid is flowing and the pump is running.
 
Pressure – Force applied per unit area.
 
Prime – Creation of a vacuum in a pump.
 
Pump Housing – The casing of the pump, made of plastic, stainless steel, aluminum or iron.
 
Pumping Level – The lowest level of water during the pumping process.
 
Shock Mounts – Rubber mounts that are used to help control a pump’s vibration.
 
Strainer – A filter at the end of the suction hose that prevents large objects from entering.
 
Thermal Overload Sensor – A sensor in a pump that shuts down the system when the operating temperature exceeds the limit of safety.
 
Viscosity – The degree to which a fluid resists flow when pressure is applied.