Page 60 - Fall 2023 EDM Today

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TECHTIPS

A freshly regenerated resin bottle produced by a repu-
HEAD CONNECTIONSHEAD CONNECTIONS

table water treatment company will produce .5 µS/cm
water. Most water based EDM’s require process water in
There are a variety of options for connecting the resin
the range of 15 µS/cm. As you might imagine, due to the
tank to the machine. Each style has both advantages and
disparity in conductivity between the resin bottle output
and the ideal process water conductivity, the process
of operator or maintenance department preference.
water is only passed through the bottle intermittently as
Below are a few examples:
needed to maintain the required setpoint. disadvantages, and the choice is often merely a matter
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As the bottle is used, the conductivity of its output water
will steadily decrease until, at some point, it reaches the
set point and must be replaced.

CAPACITYACITY
CAP
Capacity is a measure of how much ionic contamina-
tion a resin system can remove before the output water
quality deteriorates. The capacity is tested by dissolving
a salt into water and passing the salt water through a QD3 Type
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deionizing system. The quantity of salt dissolved in the
water necessary to exhaust the capacity of the system to
produce water of a known quality determines the system
capacity. The weight of the salt that was dissolved into
the water determines the capacity, which is typically
measured in grains. The capacity of a system is infl u-
enced by both the intensity of the treatment of the beads
and the volume of the beads. Volume capacity is typical-
ly measured in cubic feet.

Thus, for all intents and purposes, the capacity of the
bottle will be related to its size. The size of a bottle is Cam and Groove Type
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typically described by a number combining its diameter
and height.
Typical bottle sizes are:

Capacity (Grains)
Model
50
9,000
835
1035

100
19,000
1047 12,000 69 Garden Hose Type
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200
1447
35,000
The most common sizes utilized in EDM applications
are 835 and 1035.

When considering what size is best for your operation,
it is important to choose a tank size whose weight will
not be an issue for both in-plant handling and shipping
to the regenerator.

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Gardena Type

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