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Industrial Catalog

Bi-Channel Submersible Pumps

High efficiency pumps with bi-channel impeller.

Bi-Channel Submersible Pumps

2 products Bi-Channel Submersible Pumps

Bi-Channel Submersible Pumps · Specification range

A submersible pump with a twin-channel impeller is a drainage pump whose impeller carries two channels — two closed passages between the vanes — instead of a single channel or a recessed vortex geometry. This layout delivers a compromise between hydraulic efficiency and solids passage: less efficient than a single-channel impeller but more efficient than a vortex, with the capacity to pass dispersed medium-sized solids without significant clogging risk.

Impeller type
Twin-channel (two passages)
Solids passage
30–40 % of discharge Ø
Typical efficiency
55–65 % (vs 40–50 % vortex · 65–75 % single-channel)
Published series
Patrol · Titan · WFD
Power supply
Single-phase 230 V · Three-phase 400 V
Applications
Sewage · wastewater · commercial effluents

Bi-Channel Submersible Pumps · Technical Overview

Typical hydraulic efficiency on a twin-channel impeller sits between 55% and 65%, against 40–50% for a vortex impeller and 65–75% for a single-channel equivalent. Solids passage typically covers 30 to 40% of the discharge bore diameter. This middle ground makes the twin-channel the natural choice in domestic and commercial wastewater lift stations where the liquid contains dispersed particles but rarely large unpredictable solids — situations where the extra energy cost of a vortex impeller is not justified.

The range published on this page covers the Patrol and Titan series distributed by JOVAL for more demanding industrial loads in single-phase and three-phase versions, and the WFD series in a compact body, available in a twin-channel variant for small and medium installations. These series are also presented — together with the other impeller families — in the main Drainage Pumps category, where they can be compared against vortex, single-channel and grinder alternatives. For duplex configurations with automatic alternation between two pumps, the direct complement is the BA2CF control panel manufactured by JOVAL.

Frequently asked questions

  1. What is a twin-channel impeller and how does it work?

    It is a submersible pump impeller with two closed passages between the suction eye and the volute, instead of a single passage or a turbulent free-flow zone. The two channels distribute flow evenly, reduce radial vibration and keep hydraulic efficiency at a relatively high level for a solids-handling design.

  2. When should I choose twin-channel over vortex?

    When the liquid contains dispersed small-to-medium solids — typical of domestic and commercial sewage — and energy efficiency is an important criterion. A vortex is preferable only when the unpredictability of the solids is the dominant factor.

  3. What hydraulic efficiency can I expect from a twin-channel pump?

    Typically between 55 and 65%, placing it between the 40–50% of a vortex impeller and the 65–75% of a single-channel equivalent. This middle ground translates into lower electrical consumption than a vortex on continuous loads, for comparable flow and head.

  4. What maximum solid size can a twin-channel pump pass?

    Typically up to 30 to 40% of the discharge bore diameter. On a pump with a 2" (≈50 mm) outlet, this corresponds to solids up to about 20 mm. The exact figure per series is given on each product page datasheet.

  5. What other impeller geometries exist for drainage?

    Besides twin-channel, the Drainage Pumps category features vortex (free-flow), single-channel and grinder impellers. The choice depends on the type of solids, the efficiency required and the operating duty.