User's Manual

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Application

The Twistork Helix Mixer is intended to mix and maintain paints and similar fluids in closed-head, 55-gallon (200-li-

ter) drums with 2-in. npt bung connections. The Twistork Helix Mixer provides suction porting through its siphon

tube, which allows you to siphon fluid to a pump while mixing it.

Standard Mixer, Model 236629

The standard mixer operates in a center-lift fluid rota-

tion mode, which is preferred in most applications

because it minimizes fluid aeration. The helix rotates

counterclockwise and mixes fluid by lifting it up from

the bottom of the drum. See Fig. 1.

Standard mixer Model 236629 cannot reverse its helix

rotation.

Oil-less Reversible Mixer, Model 236760

The oil-less reversible mixer operates the same as the

standard mixer, but it uses a non-lubricated air supply,

and the helix rotation can be reversed.

NOTE: Although the air motor can operate without oil,

motor life is increased when lubrication is provided.

To reverse the helix rotation on reversible mixer Model

236760, remove the air motor muffler (16a) and needle

valve (18), and switch the ports they are installed into.

See Fig. 2.

When the helix rotation is reversed, the mixer operates

in a pull-down fluid rotation mode, which can be better

for agitating fluids that are difficult to put into suspen-

sion. The helix rotates clockwise and mixes fluid by

pulling it down from the surface. See Fig. 2.

With clockwise (pull-down fluid rotation), care must be

used at high speeds to prevent cavitation, which could

be caused by air being drawn down to the siphon inlet.

Fig. 1

Model 236629

Standard (counterclockwise) Rotation

03401B

16a

03401B

Fig. 2

Model 236760

Reversed (clockwise) Rotation

16a

03402B