User's Manual

8 308345
Operation
WARNING
MOVING PARTS HAZARD
To reduce the risk of serious injury,
including cuts, amputation of fingers,
and splashing in the eyes or on the skin:
Always shut off the mixer and disconnect the air
line before you check or repair the mixer.
Maximum Siphon Flow Rate
The volume of fluid that can be siphoned through the
mixer inlet is determined by the viscosity of the fluid.
 The maximum flow rate is approximately 12 gpm
(45 lpm) with 100-centipoise fluid.
 The maximum flow rate is approximately 1.2 gpm
(4.5 lpm) with much heavier 1000-centipoise fluid.
To prevent pump cavitation, avoid flow rates higher
than these. Check the fluid periodically for signs of
cavitation.
Air Requirements
For continuous use, the 0.75 HP air motor typically
requires 2.5 scfm (0.071 m/min.) of air at 400 rpm or
5.7 scfm (0.162 m
3
/min.) of air at 800 rpm.
Nitrogen Charging the Drum
CAUTION
If you are using nitrogen to charge the drum, use a
maximum of 0.25 psi (1.7 kPa, 0.02 bar). Such low
pressure requires special regulation equipment. Use
a passive, non-pressurized system when possible.
Higher pressure could push fluid through the shaft
seal (21) and into the top bearings (11), damaging
them. See the Parts Drawing on page 16.
Operating the Mixer
See Fig. 6
CAUTION
The bearing nut (8) helps prevent excessive fluid
flow between the siphon tube (4) and helix tube (7),
but it is not intended to be a complete seal. Fluids
can pass through the bearing nut into the gap be-
tween the two tubes. Before you change colors or
coatings or store the mixer, clean the tubes as
instructed on page 10.
NOTE: Thoroughly agitate the fluid before you use the
suction feature. Agitating maximizes fluid quality and
helps avoid solids getting drawn into the siphon tube
and clogging it. A Strainer Inlet Kit 236984 is avail-
able to help prevent thick sediment from being forced
into the siphon inlet.
CAUTION
Do not operate the mixer at a high speed for a long
period of time. Excessive mixer speed can cause the
fluid to foam and can cause vibration and increased
wear on parts and damage to the drum bung. Only
agitate the fluid fast enough to maintain even mixing.
You can view fluid movement through the 0.75-in.
port on the drum cover.
NOTE: If you install an air shut-off valve, the same
mixer speed is set each time it is turned on without
requiring repeated needle valve adjustments. Order
one of the following air shut-off valves:
Part No. 208390: 1/4 npt(m) x 1/4 npt(m)
Part No. 208391: 3/8 npt(m) x 3/8 npt(f)
Part No. 208392: 3/8 npt(f) x 1/4 npt(m)
Part No. 208393: 3/8 npt(m) x 3/8 npt(m)
You can also use an air line quick-disconnect (F) as a
shut-off. See Fig. 5. See Air Line Quick-Disconnect
on page 6.