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 There
are significant differences between blending and cleaning operations
which must be recognized when applying side entering mixers to
crude oil storage tanks. The flow patterns established by blending
mixers allow sediment accumulations. These "dead spots" are
not effected by increased running time or by ineffective reversal
of propeller operation. They are removed only by the direct sweeping
action of the propeller flow stream.
The unique Jensen Vari Angle feature allows
this flow stream to be directed to any area of the tank assuring
complete tank cleaning. Jensen Vari Angle Mixers will completely
remove sediment build ups from old tanks. Jensen Vari Angle
Mixers will guarantee freedom from manual tank cleaning. Recommended
Vari-Angle Mixer location for tank cleaning shown in left side
graphic.
The
Vari Angle feature is a precision, ball-type stuffing box allowing
60º angular movement. Sealing is accomplished by
Teflon® impregnated non-asbestos packing which is fully
adjustable to eliminate leaks. Mixer weight is supported
entirely by two heavy duty, pin type hinges. As with
all JENSEN Mixers no turn-buckles, tie rods, bases, or other
extra supports are required. Angle changes can be made
easily by one man, or automatically controlled by the optional
Mechanical Actuator.The vari-angle feature of Jensen mixers
has been proven to be effective for the resuspending of tank
bottoms sediment. It does so by directing the propeller
flow stream(s) toward deposits on the tank floor. In
order for vari-angle mixers to be fully effective the entry
angle of the mixers should be changed periodically.
 Jensen offers the mechanical actuator which
assures that the mixer continually moves across its sixty degree
entry angle, from left to right and back to left, over a period
of approximately ten hours running time.Obviously, any mechanical
device requires energy for its operation, however, the Jensen
mechanical actuator consumes so little energy as to be nearly
impossible to measure. It can be easily retrofitted to older
mixers without concern for modifications to power sources.
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