What is the difference between a vortex impeller and a channel impeller?

In a closed-channel impeller the liquid passes between the vanes and makes direct contact with them, giving high efficiency but risking clogging on large solids. In a vortex impeller the vanes are recessed and create a turbulence that carries the solids through without direct contact — sacrificing efficiency but eliminating the clogging risk.

When should I use a pump with a vortex impeller?

In installations where the liquid contains solids, fibres or organic matter in suspension — domestic sewage, livestock effluents, construction site dewatering and wastewater sumps. It is the right choice when reliable solids passage matters more than peak hydraulic efficiency.

What is the maximum solid size a vortex pump can pass?

Typically up to 35–50 % of the discharge bore diameter. For a pump with a 2" (≈50 mm) outlet that means solids up to about 25 mm; on larger industrial pumps, several tens of millimetres. Exact figures are in each series datasheet.

Is a vortex impeller less efficient than a channel impeller? By how much?

Yes. A vortex impeller has a typical hydraulic efficiency of 40 to 50 %, against 60 to 70 % on an equivalent closed-channel impeller. The extra energy cost is outweighed by the near-zero clogging risk when handling unpredictable solids.

How do I choose between vortex and twin-channel for wastewater?

Vortex passes large solids but has lower efficiency; twin-channel passes medium solids with better efficiency. For effluents with dispersed particles, twin-channel is preferred; for liquids with unpredictable solids content, vortex is safer. Both geometries are listed in the Drainage Pumps category.

Industrial Catalog

Vortex Submersible Pumps

Vortex impeller pumps for water with solids.

A submersible pump with a vortex impeller — also called a free-flow impeller — is a drainage pump whose impeller sits recessed from the suction eye, creating a turbulent zone (a vortex) that carries solids through the pump with no direct contact with the vanes. This geometry allows the pump to pass large solids — typically up to 35 to 50% of the discharge bore diameter — with no risk of clogging, at the cost of some hydraulic efficiency compared to a closed-channel impeller.

Impeller type: Vortex (free-flow)
Solids passage: 35–50 % of discharge Ø
Typical efficiency: 40–50 % (vs 60–70 % closed channel)
Published series: JRV · Patrol · Titan · WFD · PVT
Power supply: Single-phase 230 V · Three-phase 400 V
Applications: Wastewater · sewage · sludge · effluents

4 products Vortex Submersible Pumps

JRV Electric Pumps

JRV electric pumps with vortex impeller for wastewater.

Eletrobombas submersíveis Patrol e Titan JOVAL

Patrol & Titan Submersible Electric Pumps

Electric pumps ideal for pumping wastewater and effluent drainage

Eletrobomba submersível WFD JOVAL vortex e bicanal

WFD Submersible Electric Pumps - Vortex & Bicanal

Submersible electric pumps for wastewater and drainage, available in Vortex and Bicanal versions.

PVT / PV-R / PV-A

Submersible pumps for wastewater and drainage.

The published range covers the JRV series, manufactured by JOVAL in Fafe for domestic wastewater with suspended solids; the industrial Patrol and Titan series distributed by JOVAL for more demanding single-phase and three-phase loads; the WFD series in a compact body, available in a vortex variant for small lift stations; and the PVT series with integrated grinder, for fibrous matter such as sanitary textiles and food-waste fibres.

Vortex pumps are one of several technical families inside the main Drainage Pumps category, where they sit alongside other impeller geometries (single-channel, twin-channel, mono-channel) and their matching control panels. For duplex configurations with automatic alternation between two pumps, the direct complement is the BA2CF control panel manufactured by JOVAL, with digital protection in an ABS IP 55 enclosure.

Frequently asked questions

What is the difference between a vortex impeller and a channel impeller?

In a closed-channel impeller the liquid passes between the vanes and makes direct contact with them, giving high efficiency but risking clogging on large solids. In a vortex impeller the vanes are recessed and create a turbulence that carries the solids through without direct contact — sacrificing efficiency but eliminating the clogging risk.
When should I use a pump with a vortex impeller?

In installations where the liquid contains solids, fibres or organic matter in suspension — domestic sewage, livestock effluents, construction site dewatering and wastewater sumps. It is the right choice when reliable solids passage matters more than peak hydraulic efficiency.
What is the maximum solid size a vortex pump can pass?

Typically up to 35–50 % of the discharge bore diameter. For a pump with a 2" (≈50 mm) outlet that means solids up to about 25 mm; on larger industrial pumps, several tens of millimetres. Exact figures are in each series datasheet.
Is a vortex impeller less efficient than a channel impeller? By how much?

Yes. A vortex impeller has a typical hydraulic efficiency of 40 to 50 %, against 60 to 70 % on an equivalent closed-channel impeller. The extra energy cost is outweighed by the near-zero clogging risk when handling unpredictable solids.
How do I choose between vortex and twin-channel for wastewater?

Vortex passes large solids but has lower efficiency; twin-channel passes medium solids with better efficiency. For effluents with dispersed particles, twin-channel is preferred; for liquids with unpredictable solids content, vortex is safer. Both geometries are listed in the Drainage Pumps category.

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Vortex Submersible Pumps