Some of you may have heard this term and some may not: trash pumps. These pumps are designed for dewatering applications and are portable. These kind of pumps have the capability of moving water with solids in it such as twigs, sludge, sand, leaves and mud. Most trash pumps are portable versions of heavy duty centrifugal pumps.
How Trash Pumps are Different from Standard Pumps
The impeller veins are deeper and the discharge openings are much larger than similar pumps that are not designed to be trash pumps. Consequently, these pumps are able to move fluids with solids that would clog up standard centrifugal pumps. Not only can they move fluids containing too many solids for other pumps, they can also move them at a high rate of speed.
While many pumps grind up the solid materials that enter the pump, trash pumps do not. In addition to the deep impeller veins and large discharge openings, these pumps feature a full pump housing. These pumps can be made from a variety of materials, including: cast iron, stainless steel, steel and aluminum. Roll cages are also common standard equipment on most trash pumps.
There’s another variation called a semi trash pump, which does not have as large of a discharge opening as a trash pump. Due to the smaller opening, they cannot handle larger solids, nor can they handle a high density of solids.
These kind of pumps are the pump of choice for rigorous pumping large or highly concentrated solids, especially on a daily basis.
Some manufacturers do not always differentiate between trash pumps and semi trash pumps, so it is important to work with a company that provides comprehensive customer service.
A strainer is often used in addition to a hose at the inlet of these pumps to keep out solids that are too large for the pump to process.