Submersible pumps are pumps that have an air-tight sealed motor close-coupled to the pump body, meaning the entire pump assembly is able to be submerged in the fluid that is to be pumped. This of course means a submersible pump never requires priming, as the entire assembly is submerged in the fluid.
The main advantage of sub pumps are that pump cavitation is prevented – a problem associated with high elevation differences between pumps and the fluid surface.
These pumps actively push fluid to the surface, as opposed to jet pumps which create a vacuum and are completely reliant upon atmospheric pressure. This means submersible pumps are therefore more efficient than say jet pumps.
Applications where these pumps are used can extend from the pumping of light and medium duty within residential and commercial properties to pumping of heavy duty with high concentration of rags and solids in municipal wastewater collection networks and in industrial wastewater applications.
They are also ideal for the following applications:
– Drainage
– Sewage Pumping
– General industrial pumping & slurry pumping
– Pond filters

Multiple stage sub pumps (SAER Pumps) are usually lowered down in to a borehole and most typically used for water extraction in residential, commercial, municipal and industrial water applications, as well as in water and oil wells.

Other applications where submersible pumps are ideal include:
– Sewage treatment plants
– Handling of seawater handling
– Firefighting )thanks to a flame-retardant cable)
– Water & deep well drilling
– Offshore drilling rigs
– Artificial lifts
– Dewatering of mines
– Irrigation systems

Pump & Valve are the official New Zealand agents for the brilliant Sulzer/ABS range and therefore offer experience and the service/spares to match!