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Farvis - Engineering since 1840

“Quality at Trade Prices”

All Farvis Products are design copyrighted

How it Works

This is a typical data log graph from a Propamiser test - it is the graph of an actual unit, not a demonstration model

The blue line shows the gas pressure and the red line indicates temperature.  This is a low temperature unit running at about 185 oC for thermo-plastics.  Other  control units can work at 260 oC for standard bitumen. In tests we can usually maintain the temperature within 1 - 2 oC at  200 oC but on site there would be a greater fluctuation as material is used and new supplies are melted down.

You can see how the gas pressure remains at full providing maximum burner power until the operator determined temperature is reached.  The system then shuts the main burner off to prevent the material getting too hot.   The burner comes on again as the temperature falls.  It then cycles, increasing and decreasing the burner gas supply to hold the temperature steady.

You can see from the graph that the control system is accurate enough not to put the burner back to full power - Propamiser only uses what is necessary to maintain the temperature at the set level and thus saves the operator a great deal of fuel!  As the red temperature line drops slightly, the blue line, indicating burner output, rises to compensate.  If however the temperature drops more than a couple of degrees, Propamiser reacts immediately and gives full power to the burner to take the temperature back to the pre set level - then it switches back to economy and cycles until needed again.  It does all this automatically while monitoring the main burner and pilot flame and safeguarding against flame failure.


The result is a safer workplace, better quality material and huge savings in gas.

Can you afford NOT to use a Propamiser?