What makes bitumen emulsion difficult to pump
An emulsion is bitumen dispersed in water. Heavy shear, excess speed or long recirculation can separate the two phases. Once the water has gone, the bitumen left behind sticks to every surface in the pump.
A positive displacement gear pump running slowly moves the product gently. Flow is proportional to speed, so you set the application rate from the drive.
SB series for emulsion sprayers and tanks
On sprayers and tankers we normally propose the SB series. It flanges onto the tank with its body immersed and has two built-in valves for loading, internal recirculation, discharge and transfer. Its integrated heating circuit is useful when residue has set in the pump after a stop. The same pump is fitted to bitumen spreaders and tanks.
CR and NAV series for emulsion plants and bulk transfer
In production plants and depots the pump sits in the pipework. The CR series has a heating jacket around the whole pumping chamber. It is the right choice where the line also carries hot bitumen or where residue has to be softened before start-up.
The flanged NAV series has no jacket and covers large transfer duties, with theoretical flow rates from 54 to 2770 l/min. The model for your emulsion is confirmed by our technical office.
Selecting an emulsion pump with our technical office
Send us the type of emulsion, the flow rate, the working temperature and the layout. Our engineers in Bologna choose the series, the size and the speed, and advise on bare shaft, motor pump unit or geared motor.
Emulsion residue is easier to deal with before it dries, so tell us how the pump will be flushed or heated between jobs. Message us on WhatsApp or use the quote form.
