The Sala series of vertical froth pumps VF

Metso's VF froth pump has been designed to increase the pumpability of frothy suspensions. The principle of operation is similar to that of hydro- cyclone separation.

Air is separated from the slurry in a vortex created by the impeller rotation and the tangential inlet to the pump ’s conical sump.This results in more efficient pumping at higher capacities and a smooth operation, free from pulsations caused by airlocking.

Flow rates to 1 500 m³/h - 6 000 USGPM
Heads up to 20 m - 70 ft

The VF pump is suitable for:

The VF Froth Pump is ideal for all applications involving handling of air entrained slurries, such as fl otation froth in base metal concentrators, phosphate and apatite washing plants and calcium carbonate upgrading plants
The pump can also be used as a mixing and distribution unit, where dry powder has to be mixed (and wetted) with water
It can also be used with cement in ready mixed concrete and for grouting

Main benefits for the VF pumps are:

Integrated unit for layout flexibility
Smooth operation of the open vortex created in the sump and vertical "wet end" inlet prevents air locking
Cantilever design does not require submerged bearings or shaft seals
Bearing assembly with double protection sealing arrangement to prevent ingress of slurry
Wear parts are available in a variety of different materials
Simplified maintenance

Main features for the VF pumps are:

The pump, pump sump and driver are integrated in one self contained unit. Simple to install and connect. No alignment or special foundations needed
The design ensures minimum maintenance and eliminates any requirement for water flushing
Impeller clearance is maintained by external axial adjustment of the shaft/bearing assembly