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Liquid Process Systems has launched the Vector series model VB10C thermal fluid filtration system for asphalt plants.

The heat transfer fluid filtration system filters contaminants down to 10 microns and has been specifically developed for hot and warm mix asphalt and associated plants.

The company said the Vector series model VB10C is easy to integrate within a new or existing facility.

It continually filters contaminants on a side stream basis to keep fluids clean for higher heat transfer and plant efficiency, longer fluid life and minimum maintenance downtime.

System flow and pressure available from the plant process is used to re-circulate hot oil or thermal fluid from the pump discharge through the filter.

Clean fluid is then returned to the suction side of the pump.

The system can withstand up to 150psig (10.5bar) of pressure and temperature up to 245C (650F).

Flow rate and cleaning capacity of the model VB10C is up to 15 gallons per minute (114 litres/min) or more than 900 gallons per hour (3,405 litres/hour).

Liquid Process Systems said this is enough cleaning capacity to filter the entire volume of a smaller system several times in a typical day.

As a result, the useful life of the hot oil is increased since it is filtered and remains clean to last longer.

Fouling and carbon sludge build-up are reduced, unscheduled maintenance is minimised and heat transfer efficiency is increased.

With cleaner fluid, wear on moving parts such as process pump mechanical seals, impellers and valves are reduced.

In fact, filtering hot oil normally results in a threefold increase in pump life, according to Liquid Process Systems.

Judy Shums, president of Liquid Process Systems, said: ‘Not filtering the hot oil or thermal fluid at your plant could disrupt your operation at the most inconvenient times, for example, when a line of asphalt trucks are ready to load and you can’t get up to temperature, or working overtime nights and weekends to repair pumps and clean out clogged lines.

‘Our system is customised for quick and easy installation in your plant with only a minimum time disruption.

‘All we have to do is make the two inlet and outlet connections by choosing either threaded, socket weld or flanged.

‘Investment is minimal and payback is quick depending on total volume filtered.

‘Disposable elements are cheap and easy to replace,’ Shums added.

The Vector series model VB10C from Liquid Process Systems uses economical glass-fibre wound cartridges that have good dirt-holding capacities, are easy to change and are disposable.

Life of the filter element is approximately six to 10 weeks, depending on condition of the fluid.

Regular filter change-outs can also be scheduled if preferred by maintenance and operations personnel.

As an option, an electronic filter condition monitoring system is available that displays a flashing light or communicates directly with the plant’s computer monitoring system to notify the plant operator when filter cartridge needs replacing or when it is completely clogged.

Shums noted that initially more frequent change-outs of the filter can be expected.

As the fluids become cleaner, change-outs become much less frequent, she added.

Fluid is drawn into the filter unit by tapping the existing piping that diverts a small percentage (usually about 10 per cent) through the filter unit.

The fluid is then cleaned and re-introduced downstream or to the suction side of the existing recirculation pumping system.

Liquid Process Systems

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