You cannot log in without being assigned a valid TSI role.
SEARCH
Variable Volume (VV) Venturi Valves are pressure independent flow regulators, designed to maintain a constant flow rate as duct static fluctuates.
VV Valves have a high-speed electric actuator to reposition the valve in order to change its flow rate in response to a controller.
Venturi Valves maintain their flow setpoint without need for straight duct runs, meaning that they are ideally-suited for volumetric flow control in laboratories and other critical spaces.