4 Installation
10
Read the instructions carefully and pay special attention to the warnings! Always check the tank cleaning machine before
operation.
Step 6
Vessel Drainage
If it is necessary to clean the floor of a vessel, remember that standing liquid will diminish the effectiveness of the jet by
covering any soils underneath.
If the tank is outfitted with a drain, the 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 A2 or even to operate it intermittently to allow time for draining.
If the tank will be evacuated with an external suction source, ensure the suction pump and hose are of sufficient size to keep
the liquid level to a minimum.
Step 8
Filters and Strainers
All tank cleaning systems should be equipped with a filter or strainer that will trap solids
0.006” (150 micron, 100 mesh) or
larger
, as these will not pass through the Alfa Laval GJ A2. 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 A2 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 A2, 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.
Step 9
Capacity of Supply Pump
The Alfa Laval GJ A2 can be used with either a centrifugal or positive displacement (constant volume), PD, style pump. In
most cases, if the Alfa Laval GJ A2 is to be used with a centrifugal pump, the Alfa Laval Gamajet 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
Alfa Laval GJ A2 pressure/flow rate requirements into account.
If a PD style pump (i.e. piston pump, plunger pump, or mechanical diaphragm pump, etc.) will supply the wash fluid to the Alfa
Laval GJ A2, 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 Gamaje A2 / plumbing system
. If a PD pump
is used, the Alfa Laval GJ A2 should be sized to, first, match the flow capability of the pump and, second, not exceed the
pump's maximum operating pressure (taking the pressure rating of the plumbing system into account, also).
Warning: For high-pressure applications (over 10bar / 145psig), 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 / 150psi per second, the machine may be damaged and parts will wear out prematurely.
Damage resulting from this phenomenon is not covered by the warranty.
Summary of Contents for GJ A2
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