Pumping tar: heat first, then start
Tar thickens quickly as it cools, and pitch sets solid at room temperature. Starting a gear pump full of cold product puts the whole load on the shaft. The rule is simple: bring the pump up to temperature, then run it.
Once hot, a positive displacement gear pump delivers a fixed volume per revolution and keeps its flow rate as the viscosity varies. It is self-priming, so it can draw from a tank below the pump.
CR series: jacketed tar pump for plants and pipework
The CR series is the one we normally propose for tar and pitch in fixed installations. Its heating jacket completely surrounds the pumping chamber, and pitch is among the products the series was built for, along with bitumen and bituminous compounds. Ten sizes run from 14.5 to 4292 l/min of theoretical flow. The model for your product is confirmed by our technical office.
SB series: tar pumps on tanks and road machinery
On mobile tanks and road machines we normally propose the SB series. The pump flanges onto the tank with its body immersed in the product. Two built-in valves handle loading, internal recirculation, discharge and transfer, and a heating circuit is integrated. The gears can be taken out without emptying the tank.
The same layout is used on bitumen spreaders and tanks.
Tar, pitch and fillers: what we need to know
Some tar and pitch compounds carry fillers that can be abrasive, so tell us what is in the product. We also need the working temperature, the flow rate and the pipe run. Our technical office in Bologna defines the model, the speed and the drive. For very thick product a geared motor unit keeps the speed low. ATEX documentation is available on request.
If you also handle road binders, see our bitumen pumps and bitumen emulsion pumps. To start a selection, write to us on WhatsApp or send the quote form.
