MIXMATIC

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Contact: werner.wolfschluckner@rosenbauer.com

	Characteristic
	The ROSENBAUER MIXMATIC system uses a diesel powered foaming agent pump. A differential pressure control steers the foaming agent pump, ensuring constant pressure that is 4 bar above that generated by the extinguishing water pump. The foaming agent is conducted to the pressure outlets via pressure line, where it can be added at differing rates.

The ROSENBAUER MIXMATIC benefits:

Independent and simultaneous delivery of water or foam at each outlet.
The extinguishing medium (water or foam) and the admixing rate is adjustable at each outlet (independent from the other outlets) in the range of 200 - 6000ltr/min.
The proportioning rate can be adjusted between 2% and 8% directly at the outlet
Accuracy of admixing rate ±10% at the whole delivery rate
The foam agent pump is controlled by an electronically speed controller of the driving engine.
The foam agent is not damaged by a continuous circulation, because only the real consumed volume of the foam agent will be delivered by the foam agent pump.
External water and foam agent suction during the fire extinguishing operation
The extinguishing water pump is not admitted with the foam agent.

The ROSENBAUER MIXMATIC ensures to meet all requirements regarding the individual demands of each fire accident on the basis of the independent and simultaneous delivery of water or foam at each outlet. So it is possible to use pure water at one or several outlets and foam with a proportioning rate of 2% - 8% at the remain outlets by a delivery rate of 200 ltr/min - 6.000 ltr/min. The adjustment of the extinguishing medium (water or foam) and in case of a foam operation also the selection of the proportioning rate can be done directly at each outlet. The ROSENBAUER MIXMATIC is a practice-orientated solution for a professional operation and additionally it saves time.

Technical data

Water pump

ROSENBAUER R600

Foam agent pump

3-stage ROSENBAUER centrifugal pump made of gun metal, driven by a sound insulated HATZ- DIESEL engine. The delivery rate of this pump is 440 ltr/min at a pressure of 16bar.

Control

A constant pressure difference of 4 bar between the extinguishing water and the foam agent is maintained by means of an electronical differential pressure control unit. This control unit controls the speed of the pump driving engine (HATZ- Diesel) and in that way the delivery rate of the foam agent pump. This means, that the volume of the foam agent is always adjusted to the instantaneous delivery rate of the extinguishing water and the selected proportioning rate.

Foam proportioning

The adjustment according to the instantaneous delivery rate of the extinguishing water is done by the ROSENBAUER PRESSURE PROPORTIONER DZ120. An eccentric in the pressure proportioner doses the foaming agent exactly as a function of the water volume at the pressure outlet. There are different eccentrics for different proportioning rates - two in each pressure proportioner. This means that there are two foam proportioning rates defined at each pressure outlet. By turning on both eccentrics, a third proportioning rate is obtained, namely the sum of the rates of the two eccentrics. When the foam line to the pressure proportioner is shut off, the outlet delivers water only. However, the system can be switched over to foam at any time, even during extinguishing operations. The ROSENBAUER DZ500 ensures an automatic foam proportioning the entire operating range of the monitor.

Performance data

Delivery rate:	DZ 120: 200 - 1.200 ltr/min DZ 500: 400 - 5.000 ltr/min

Accuracy of admixing rate:	+/- 10 %

Proportioning rates:	von 2 % bis 8 %, as a combination of two eccentrics in the pressure proportioner (2%, 3% and 4%)