2B Technologies
2100Central Ave Suite 105, Boulder, Colorado 80301 USA Model 306 Quick Start Guide Rev B
Phone 303-273-0559 Fax 303-277-1812 http://www.twobtech.com
Alternative Installation: Pushing flow from the Model 306.
For some applications, the customers may want the Model 306 to push into a chamber or other
type of passive equipment that does not actively pull or push flow. In the case that the equipment
is not very restrictive and is near ambient pressure, the Model 306 may provide enough flow (up to
~ 1 L/min) and will not need any additional modification. If more flow is needed (up to ~ 3 L/min)
or the chamber/equipment is fairly flow-restrictive, a needle valve can be installed on the outlet of
the internal overflow scrubber (see Figure 2). Adjustment of the needle valve will control the
portion of flow that is vented inside the box and the portion that is directed to the outlet.
Suggestions for Measuring the Flow to the User’s Equipment
If the user wants to measure the flow rate delivered to their equipment, we suggest they use one
of the following methods:
1. Use a flow meter on the internal overflow scrubber to measure the vented flow rate and
read the total flow rate from the Model 306. The flow to the user’s equipment is the
difference between these two measurements.
2.
Use a scrubber after the user’s equipment and then a flow meter. This allows for direct
measurement of the process flow, but may pressurize the process if the scrubber or flow
meter is restrictive. Ozone must be destroyed in the gas stream using a scrubber to
prevent damage to the user’s flow meter.
Figure 2.
Photograph of the Model 306 showing where a needle valve
can be installed to increase the flow or pressure at the outlet.
Ozone Generator
Place to install a needle
valve for increasing the
outlet flow or pressure
Outlet
Internal
Overflow
Scrubber
