Alfa Laval GJ PF, Instruction Manual

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4 Installation
Read the instructions carefully and pay special attention to the warnings!
Always check the tank cleaning machine before operation.
Step 7
Vessel drainage
If it is necessary to clean the floor of a vessel, remember that standing liquid will diminish the effectiveness of the Alfa Laval
GJ by covering any soils underneath. Wherever possible, the tank floor should be pitched toward the drain and the drainage
opening should be large enough to eliminate or reduce any liquid buildup or puddling. If gravity alone is insufficient, a scavenger
or stripper pump should be connected to the drain to suck out the excess wash fluid. In extreme cases, it may be necessary to
use smaller nozzles on the Alfa Laval GJ, or even to operate it intermittently to allow time for draining.
Step 8
Filters and strainers
All tank cleaning systems should be equipped with a filter or strainer that will trap solids 1.5 mm/1500 micron and larger, as
these will not pass through the Alfa Laval GJ . These particles can become caught in one of the internal passages of the machine
and cause it to stop turning or reduce its cleaning effectiveness due to a loss of flow. It will then be necessary to disassemble
the Alfa Laval GJ and remove the blockage.
In recirculated (closed-loop) cleaning or any other application where the cleaning solution may carry abrasive solids in
suspension, adequate filtration is a must. These particles can be extremely destructive to the Alfa Laval GJ , pumps, valves,
and other system components. Filters, properly installed and maintained, will more than pay for themselves with lower overall
operating costs in these applications. Furthermore, to ensure that clogged filters or strainers are cleaned, we recommend
using automatic self-cleaning models.
Step 9
Capacity of supply pump
The Alfa Laval GJ PF can be used with either a centrifugal or positive displacement (constant volume), PD, style pump. In
most cases, if the PowerFlex is to be used with a centrifugal pump, the PowerFlex should be configured so that the pump
will operate close to its best efficiency point. The end user must, therefore, take all of the plumbing, elevation, and PowerFlex
pressure/flow rate requirements into account.
If a PD style pump (i.e. piston pump, plunger pump, or mechanical diaphragm pump, etc.) will be supplying the wash fluid to
the Alfa Laval GJ PF, a different set of rules apply. PD pumps are fixed volume pumps whose flow rate is dependent upon the
rotational speed of the pump; the pumps also have a pressure rating which is the maximum operating pressure.
NOTE
Do not confuse the maximum operating pressure of a PD pump with the actual operating pressure, the actual operating
pressure is dictated by the fixed flow rate of the pump and the Alfa Laval GJ PF / plumbing system. If a PD pump is used,
the Alfa Laval GJ PF should be sized to, first, match the flow capability of the pump and, second, not exceed the PowerFlex’s or
pump’s maximum operating pressure (taking the pressure rating of the plumbing system into account, also).
!
WARNING
For all applications the pressure of the system must "ramp up" to its operating pressure. If the system experiences a pressure
spike or pressure increases at a rate of more than 10bar (150 psi) per second, the machine may be damaged and parts will
wear out prematurely. Damage resulting from this water hammer effect is not covered by the warranty.
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