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CHEMICAL INJECTION SYSTEM
The chemical injection system is unique in that it
utilizes the pressure spikes generated by the high-
pressure water pump to move chemical into the
main pressure stream. The high pressure spikes
move the diaphragm in the chemical pulse pump
forcing small amounts of liquid chemical to be
moved in a single direction of flow with the aid of two
check valves.
The chemical is picked up from the container and
fed through the flow meter to the chemical pulse
pump where it is pressurized.
After reaching the chemical pulse pump the
chemicals can either go into a bypass loop to purge
air from the system or the chemical can be directed
by the chemical selector valve to the metering valve.
The metering valve creates an orifice allowing the
correct amount of chemical to enter the outlet
manifold. The outlet manifold assembly is complete
with a check valve that will not allow the chemicals
to travel upstream into the plumbing system of the
unit.
The chemicals are then mixed with hot pressurized
water that make up a solution for the cleaning
application.
EVEREST EFI 980197 06/30/04
OPERATIONS
3-15
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