Recirculate mode
– Ball valve
closed, unloader by-pass fluid
flows to tank. Select this mode to
mix chemicals, keep wettable
powders suspended or to check
pump operating pressure.
By-pass mode
– Ball valve open,
Unloader by-pass fluid returns to
pump manifold. Pressure gauge
drops to near zero (0
– 25 PSI).
Supply
Pressure
By-pass
Typical Flow Diagram
– Siebring “Fox” Sprayer
Minimum amount of
by-pass back to tank.
19
