Submersible Pumps
Submersible pumps run fully submerged in the liquid they pump, sealed for continuous underwater duty, common for dewatering, sewage, and borehole applications. NLS sources drainage, sewage/wastewater, and borehole submersible pumps from 0.5kW to 75kW, cast iron and stainless steel construction, to ISO 9906 and EN 12050, for construction dewatering, lift stations, and water supply on Saudi projects.
A submersible pump does the opposite of a standard centrifugal pump on a dry mounting: instead of drawing liquid up through a suction line, the whole pump unit sits inside the liquid, motor and all, sealed against water ingress at the shaft and cable entry. That eliminates suction lift limitations and priming issues entirely, since the pump is already flooded, which is exactly why it's the standard choice for deep boreholes, wet wells, and sump applications where a dry-mounted pump either can't reach or can't reliably prime.
NLS sources three main categories. Drainage submersible pumps handle clean to lightly contaminated water for construction site dewatering, excavation pit drainage, and flood control, typically portable with a float switch for automatic operation. Sewage and wastewater submersible pumps use a vortex or channel impeller design that passes solids without clogging, sized for lift stations and wastewater collection on hospital and utility infrastructure. Borehole submersible pumps are a narrow-diameter, multistage design built to fit down a well casing, used for groundwater supply and dewatering wells. Reference standards are ISO 9906 for pump hydraulic performance testing and EN 12050 for wastewater lifting plant construction, with cast iron as the standard wetted material and stainless steel available for corrosive or higher-purity applications.
Typical Saudi project use covers construction dewatering on excavation and foundation work, sewage lift stations on hospital and utility infrastructure, and borehole pumps on groundwater supply and site drainage projects. Motor power runs from small portable units around 0.5kW up to 75kW on large lift-station duty, and solids-handling capability, not just flow and head, is a key selection factor on sewage duty.
NLS quotes submersible pumps against the application (dewatering, sewage, or borehole), the required flow and head, and solids size where relevant, and returns a priced quote in USD. Portable drainage pumps in common sizes typically source faster than sewage lift-station units or custom borehole pumps, which are more often built to a specific well diameter and depth.
Specifications
- ✓Categories: drainage, sewage/wastewater (vortex or channel impeller), and borehole submersible
- ✓Power range: 0.5kW to 75kW
- ✓Standards referenced: ISO 9906, EN 12050
- ✓Material: cast iron standard, stainless steel for corrosive/high-purity duty
- ✓Solids handling: sewage models pass solids without clogging via vortex/channel impeller
- ✓Typical use: construction dewatering, sewage lift stations, borehole water supply
Frequently Asked Questions
What's the advantage of a submersible pump over a surface-mounted pump?+
A submersible pump is already flooded since it sits inside the liquid, so it doesn't face the suction lift limits or priming problems a dry-mounted pump has. That makes it the standard choice for deep wells, sumps, and wet wells a surface pump can't reach or prime reliably.
Can a submersible pump handle sewage with solids?+
Yes, sewage and wastewater submersible pumps use a vortex or channel impeller specifically designed to pass solids through without clogging, sized to the largest solid the application is expected to carry.
What's the difference between a drainage pump and a borehole pump?+
A drainage pump is a portable, wider-body unit for construction dewatering and pit drainage, usually with a float switch. A borehole pump is a narrow, multistage design built to fit inside a well casing for groundwater supply, a different shape entirely for a different application.
What power range does NLS supply for submersible pumps?+
NLS sources submersible pumps from small portable units around 0.5kW for site dewatering up to 75kW for large sewage lift stations and borehole applications, matched to the flow and head the application requires.