Fire protection equipment supplier DoseTech offers its FireDos fire protection foam dosing technology, known as proportioners, to the South African fire prevention and firefighting market.

The company explains that foam is the only way to effectively fight certain fire scenarios.

To generate such foam, a foam agent must be precisely admixed to the extinguishing water flow first, after which air is added as a third component, expanding the ‘premix’ to a fire-fighting foam at the point of discharge.

DoseTech has designed the sophisticated FireDos proportioners to contribute to the effectiveness of stationary fire-extinguishing systems through powerful and innovative technology.

The working principle of a proportioner consists of a proportioning pump and a water motor.

When the extinguishing water pump is operated, the water flows through the water motor of the proportioner, prompting it to rotate, enabling the water motor to drive the proportioning pump.

The water flow rate through the water motor is controlled by the valves to the sprinklers of the fire monitor, and the volumetric flow meter shows the current water flow rate passing through the water motor.

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 unpressurized foam agent tank. This is how to test the proportioning rate, while producing no foam or premix.

The purely mechanical functioning principle is also highly reliable and provides maximum safety, making the FireDos proportioners easy to operate.

The company stresses that the client must keep in mind that the exact foam agent flow rate is vital for successful firefighting when foam is used.

“This is why the proportioning rate of a foam proportioner should be tested at least once a year,” the company suggests.

With a FireDos proportioner, firefighting is easy – and, compared with other technologies, it is cost-saving and eco-friendly.

How to test the proportioning rate of a FireDos Foam Proportioner:  https://youtu.be/yHltzB6RqPU

How does a foam proportioner work:  https://youtu.be/dXU95u8WpTw