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Step Three: Calculate Acceptance
Factor (AF)
Remember our formula for calculating the
acceptance factor (AF) for diaphragm tanks?
AF = 1 -
AF = .518
Step Four: Maximum Acceptance Factor
Verification
After calculating the acceptance factor (AF),
we must compare the value to the maximum
acceptance factors shown in Table 1. In the
case of our example, an AF of 0.518 is less than
the maximum acceptance factor of all WX-420 +
WX-450 series models. Therefore, either series can
be used.
Step Five: Calculate Minimum Total
Volume (T
) of Full Acceptance
v
Well-X-Trol
®
Remember the formula:
T
=
V
T
=
V
30 + 14.7
78 + 14.7
ESP Volume
AF
196
= 378 gallons
.518
Step Six: Select Well-X-Trol
is Equal to or Greater Than "T
If ASME construction is not required, select from
420 series, Table 1.
This example would be a WX-425.
To Recap:
We went through six steps to size a full acceptance
Well-X-Trol
to gain maximum acceptance:
®
Step One
Determine pre-charge pressure
(P
pump cut-out pressure (P
pump curve of pump selected for
system.
Step Two
Determine ESP Volume (Average
GPM x run time) From pump
curve:
Step Three
Determine AF:
1 -
Step Four
Verify the calculated AF is less
than or equal to the maximum
acceptance factor for the Well-X-
Trol
Step Five
Calculate total Well-X-Trol
Volume:
Step Six
Select series 420 or 450 Well-X-
Trol
-5-
Model that
®
".
v
); pump cut-in pressure (P
1
P
+ 14.7
2
P
+ 14.7
3
required.
®
ESP Volume
T
-
AF
V
Model
®
) and
2
) from
3
®
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