Download Equipment Operation

Primeaux Associates LLC
161 Forest Drive
Elgin, Texas 78621
1-512-285-4870 FAX 1-512-281-4933
[email protected]
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Pressure feed where by the "A" and "B" components are stored in tank type vessels and
nitrogen pressure is used to push the material out of the vessels to the equipment through
feed lines. This is better than the gravity feed method, but can also lead to cavitation. This
method of feed should be used with some caution.
NOTE: diaphragm pumps can be used provided that a foot valve is installed to eliminate cavitation problems!
FLUID TRANSFER KIT:
Next, you need hoses and a fluid transfer kit to link the transfer system to the proportioning pumps
of the equipment. The gauges on the kit will tell you the line pressure and temperature of the incoming fluid
before it reaches the proportioning pumps. Often, these components are assembled in a total cabinet
configuration that includes fluid filters and air filtration. If the cabinet assembly is not available, fluid can be
filtered directly from the transfer pumps with a small in-line filter. This is not as effective as the larger
filters, but will suffice in the field. Filters also may be mounted directly on the machine to filter the fluids
coming into the proportioning pumps. Both of these filter systems must be cleaned on a daily basis.
POWER PACKS:
The amount that the proportioning pumps can move within a given time period is determined by the
type of force driving them, either air or hydraulic. Pumps designed to produce 8 to 20 pounds of fluid in a
minute usually are powered by air motors. Pumps designed to produce 30 pounds per minute or more use a
hydraulic power pack which allows for higher pressure and higher output of material.
HEAT EXCHANGERS:
In order for the system to function properly, it must be balanced, and that is one of the functions of
the heat exchangers.
The determining factor of how much material can be moved through a unit is not only determined by
the proportioning pumps and the speed and volume at which they can operate, but by how much material the
unit can effectively heat. Heat lowers viscosity. That is why material moves easier. Larger heat exchangers
can move more material over a given area in a given amount of time, and heat it more effectively for a
higher output.
HOSE TRANSFORMER ASSEMBLY:
A hose transformer assembly is what powers the heated hose. The heated hose assembly must be
balanced to the proportioning pumps, the driving motor force, and the heat exchangers. It will do no good to
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