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Dry cooler
A dry cooler is an air-cooled device that is used in connection with removal of excess heat.
Dry installation
In a dry installation the pumps are not submerged in the pumped liquid, but installed next to the sump.
Dry running protection
Hydro Boosters, Hydro MPC, Hydro Multi-E, Hydro Multi-S, Pressure/level switch, pressure transmitter, level transmitter, dry-running.
Dry weather flow
Dry weather flow refers to the wastewater flow in a sewer system during periods of dry weather with minimum infiltration.
Duty point
The duty point is at the intersection between the Q-H curve and the system characteristics.
DX system
A DX system is a cooling system where the primary coolant is used for evaporation.
Dynamic pressure
In a closed, pressurised system with a circulating media, the total pressure consists of two elements; a static pressure and a dynamic pressure.
Economizer
The operational efficiency of boiler systems that use natural gas as fuel can be improved by utilising the water content of the flue gas.
Efficiency curve
The curve shows the η (efficiency) of the pump. Efficiency is measured in %.
Efficiency performance standards
Efficiency performance standards regulate motor efficiency and stipulate minimum efficiency requirements.