Five Things to Know Before Buying a Pump - Global Pumps

Base plate: The plate on which the pump and motor are mounted.

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Decanting: Gradually pumping from one container into another.

Dosing: A controlled method of pumping in order to discharge exact amount of fluids.

Flooded suction: If the pump is below the liquid source, and the suction is fed by gravity. This is a preferred method for centrifugal pumps.

Fluid: A state of material that continually deforms under an applied shear stress. Gas, liquid and plasma are examples.

Friction loss (pump): Friction between the pump and the process fluid results in loss of pressure. Different parts of the pump are more susceptible to this force than others.

Friction loss (pipe): The force produced as the process fluid flows through the pipes of a system. Caused by movement of the fluid internally as one fluid layer moves against another. Also caused by movement of the fluid against the pipe wall. Rougher pipes will lead to higher friction.

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Open free flow: When the discharge pipe or hose is fully open at the end with no restrictions.

Self-priming pump: A pump that contains a reserve amount of process fluid that helps to create an initial vacuum and lift fluid from the source.

Specific Gravity (SG): The ratio of the density of a substance compared to the density of a reference (usually water at 4°C).

Suction line: The suction line of a pump system is piping which transports fluid material from its source to the pump itself.

Transferring: To move a substance, usually a liquid, from one place to another.

Variable speed motor: Can be used to control flow in the system by varying the impeller speed.

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