Laser Show Systems - Support Equipment
Laser Water Supply In a Club Installation
Water cooled lasers require a proper supply of clean, pressure regulated water for correct operation. A two stage water regulation installation in a club with water pressure problems is described and diagrammed.
Recently AVM of Toronto installed a laser projection system at "Club
Energy" in Regina Saskatchewan. The installation presented some
problems with water supply to the laser which was solved in a novel way
using a two stage system.
The water supply for the laser was located in the kitchen area which
entailed running some 75 ft of 3/4 inch supply and drain pipes to the laser
position. Initially a single stage, standard water handling and regulation
system was installed (see diagram 1).
The club was a victim of the "john effect". During installation and testing of the laser, it was discovered that if more than one toilet was flushed, the pressure dropped below the critical level and the laser would shut off. This entailed climbing up to the laser platform to re-start the laser which would be unsatisfactory during normal club operation when multiple toilets might be flushed simultaneously and water was also required for the dishwasher and bar.
Booster Pump Added
The solution was to install a centrifugal type booster pump (see diagram
2). A suitable half horsepower pump with a pressure gauge was located and
installed in the line between the first 3/4 inch shut-off valve and the
filter. Once the air had been bled out of the lines, the pump was activated.
Almost immediately the seals on the pump began to leak and the on-pump
pressure gauge indicated a pressure of over 100 PSI, well above the
recommended operating range of the pump.
Dual Stage Regulation Installed
To keep the pressure in the primary supply loop from exceeding the
pumpís recommended operating pressure, a bypass with a second pressure
regulator was installed (see diagram 3).
The final installation, while more complex than usual, allowed for good
primary pressure to the filter and the second regulator, which provided the
correct pressure to the laser. Higher input pressure to the system than the
laser requires is important to compensate for reduced pressure in the
replaceable filter element as the filter ages and collects particulates from
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