| Term | Main definition |
|---|---|
| Voltage | Pump electrical voltage is specified in volts. Voltage is the cause of the electric current and comes in different strengths which is indicated on your pump as a volt value. |
| Viscosity | Viscosity in a pump is the resistance to gradual deformation of a fluid by shear or tensile stress. |
| Total head | Total head of a pump is calculated as the vertical height between the level of liquid at its source to the highest point the liquid will be pumped - the discharge point of the pump. |
| Submersible Pump | A submersible pump is a pump that can be fully immersed under water. A submersible pump pushes water to the surface using pressure and never needs to be primed as it is already submerged in fluid. Submersible pumps are quiet as they are under water and some submersible pumps can handle differing sized solids. The water around the submersible pump helps to keep the motor cool. |
| Sewage Pump | A sewage pump is a submersible pump used to transfer both raw sewage liquids and solids from one point to another. |
| Seals | A diaphragm seal is a flexible membrane that seals and isolates an enclosure. The flexible nature of this seal allows pressure effects to cross the barrier but not the material being contained. |
| Rotating Seal | When dealing with pump mechanical seals, if the moveable portion of a seal rotates with the shaft, then the seal is said to be a rotating seal. |
| Rigid Pump Shaft | A rigid pump shaft is one that operates below its critical speed. |
| Rain to Mains | A rain to mains water pump system allows you to choose between using rainwater or mains water supply. |
| Radial Flow Pump | A radial flow pump is a centrifugal pump which is designed with the pump having higher discharge pressures with lower flow rates. |
| Pressure Tank | A pressure tank is a vessel with an internal bladder which holds water under pressure. |
| Pressure | Pressure is the ratio of a force over a given area, which the force is applied to. When dealing with water pumps it is usually measured in psi or kPa. |
| Performance Curve | A performance curve is a diagram which relates to the performance of a pump. |
| Non-return Valve | A non-return valve is used in a water pump application when the water source is a closed tank and situated lower or equal to the height of the pump. |
| Multistage Pump | Multistage pumps are pumps in which the fluid or water flows through two or more impellers which are fitted in a series within the pump. |
