FireDos: How does a proportioner actually work?
Proportioning systems, also called proportioners, are installed in fire extinguishing systems or available as portable systems for firefighting. Many fire scenarios require foam for effective extinguishing. To generate such foam, a foam agent must be mixed into the extinguishing water flow precisely and by means of a proportioning system. Our new FireDos demo stand makes it easy to explain the functioning principle of a foam proportioner. Our demo system represents a warehouse with a fire extinguishing system in miniature. In our new video, we explain you the following, based upon this model system:
The working principle: The proportioner consists of a proportioning pump and a water motor. When the extinguishing water pump is switched on, the water flows through the water motor of the proportioner, prompting it to rotate. This way, the water motor in turn drives the proportioning pump. The water flow rate through the water motor is controlled via the valves to the sprinklers or the fire monitor. The volumetric flow metre shows the current water flow rate passing through the water motor. The proportioning pump sucks in the foam agent, doses it and injects it into the extinguishing water pipework.
Proportioning rate testing
A ball valve can be used to switch between actual injection of the foam agent into the extinguishing water and returning it into an unpressurised foam agent tank. This is how to test the proportioning rate, while producing no foam or premix.
FireDos proportioners are easy to operate. The purely mechanical functioning principle is also highly reliable and provides maximum safety. In the video, FireDos product developer Jörn Erlenmaier operates the demo system with an integrated proportioner.
Contact Mike Feldon
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