Diaphragm Pump Calibration Instructions
(By-Pass Loop System)
Refer to the flow tables provided with your
machine to determine the proper orifice
fitting and valve setting to produce your
desired flow rate. When you receive your
machine (or if the tank is ever completely
emptied) carry out steps 1-7. To
periodically check your machines output, it
is only necessary to carry out steps 4-7.
Step 1) Loosen the jam nut and rotate the
metering - valve knob clockwise
to the closed position. Refer
to Figure 1.
Step 2) Fill the Formulation tank with the
liquid to be sprayed.
Step 3) Start the machine and push the
Spray switch to the ON position.
Let the machine spray for 30
seconds to remove any air bubbles
from the tubing, and then turn the
Spray OFF and the Machine OFF.
Step 4) Disconnect the 3/8” tubing from
the plastic elbow / nut at the bottom
of the nozzle as shown in Figure 2.
Step 5) Place the 3/8" tube connected to the
Orifice Fitting into a graduated
cylinder.
Figure 3.
Step 6) Start the machine and place the
Spray switch into the ON position.
Allow the liquid to flow into the
graduated cylinder for (1) minute
to determine the flow rate. If
necessary, increase or decrease
valve setting to achieve the
desired flow rate. Refer to Figure 4.
Step 7) Once the flow rate has been set, re-
tighten the jam nut to prevent the
valve setting from accidentally being
changed.
Replace 3/8" line (plastic nut).
Fig. 1
Fig. 2
Fig. 3
Fig. 4
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