Self-Priming Pumps
Self-Priming Pumps
Trebles supplies wet and dry self-priming pumps for fluid transfer applications, including fluids containing suspended solids. Our range is used across agricultural, construction, industrial and process applications, with extensive stock available for rapid delivery.
How Do Self-Priming Pumps Work?
Self-priming pumps are designed for applications where the pump is positioned above the level of the liquid being pumped. Unlike standard centrifugal pumps, a self-priming pump can remove air from the suction pipe during start-up, allowing pumping to begin without manually filling the suction line.
During operation, the pump creates a pressure at the inlet that is lower than the pressure acting on the liquid surface. This pressure difference draws liquid towards the pump and overcomes factors such as gravity, pipe friction and vapour pressure.
Self-Priming Pump Types
Self-priming technology is used across different pump designs, depending on the application and fluid being handled. Positive displacement pumps are inherently self-priming, while self-priming centrifugal pumps use a design that retains liquid within the pump casing, keeping the impeller and mechanical seal submerged.
This makes self-priming centrifugal pumps particularly useful for applications where the pump needs to be located above the liquid level or where suction conditions make conventional centrifugal pumping unsuitable.
Applications
Self-priming pumps are commonly used for:
- Agricultural water and fluid transfer
- Construction and site dewatering
- Industrial fluid transfer
- Process applications
- Fluids containing suspended solids
- Applications where the pump is positioned above the liquid level
