Double Vacuum Valve (DVV)

1. Check flow of air through ports of valve by applying air to the ports. With valve off, there should be no flow of air through any of the ports.
2. With 12 volts applied to (+) terminal and (T1) terminal, air should flow through ports A and B.
3. With 12 volts applied to (+) terminal and (T2) terminal, air should flow through ports A and B.