Operating Instructions

Product Overview
Siemens Building Technologies, Inc. 9
Venturi Air Valves
The Venturi Air Valve is a pre-packaged, easy to install airflow measurement and control
station. See Figure 10. This assembly combines the orifice plate flow sensor, differential
pressure transmitter, Analog Electronic actuator and a Venturi Air Valve.
This arrangement provides fast acting, stable, and precise VAV fume hood exhaust airflow
control.
FUM0400R1
Figure 10. Single-Body Venturi Air Valve.
The Venturi Air Valve is available in 6”, 8”, 10” and 12” sizes. The 10” and 12” sizes can be
ganged together (Dual-Body and Triple-Body) to achieve higher flow rates. See Figure 11
and Figure 12.
FUM0424R1
FUM0425R1
Figure 11. Dual-body Slip
Venturi Air Valve.
Figure 12. Triple-body Flange
Venturi Air Valve.