Amtrol WELL-X-TROL WX-401 - Manual (Page 2)

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Utilizing the Maximum Capacity of Full
Acceptance Well-X-Trol
®
s Series 400,
420, 440 and 450
When used with conventional pressure ranges,
these
Well-X-Trol models use only a fraction of
their maximum capacity.
For Example:
A WX-423 with a total volume of (275)
gallons will accept the following:
at 30/50 – (85) gallons or 30.9%
at 40/60 – (74) gallons or 26.7%
By using the maximum acceptance of series 420
and 450 Well-X-Trol ® , you can replace very large,
cumbersome galvanized tanks.
Let’s Compare:
A 900 gallon galvanized tank is (48″) in diameter;
(168″) long, and weighs approximately (10,000)
pounds when filled with water.
Aside from initial cost, the cost of rigging and handling
a tank of that size; (providing adequate support and
the cost of space required) significantly adds to the
overall installation cost.
Requires Air Control
Since at the higher pressures, the galvanized
tank will waterlog at an accelerated rate, some
provision must be made to maintain the required air
cushion. This means the cost of an air compressor
or other means of recharging must be added to the
installation.
On the Other Hand
The WX-423 has a total volume of only (275)
gallons; is only (36″) in diameter; and (84″) high.
When filled with water (to the 65% maximum
acceptance) it only weighs (1489) pounds.
It can be easily handled by two men, requires no
support structures and occupies a fraction of the
space of the galvanized tank. Since the Well-X-
Trol ® ’s air cushion is sealed-in, there is no need for
external air compressors or control devices.
If we can use the maximum acceptance of the 420
and 450 Series Well-X-Trol ® , we can service much
larger jobs…with large pumps, without paying the
penalty of higher installation and maintenance costs.
Step One – Determine the Best Operating
Pressure Range – Pump Cut-In (P2) to
Pump Cut-Out (P3):
The first thing we must do in sizing the bladder is to
determine the best pressure range that will achieve
maximum acceptance.
. We can be accurate by letting the pump tell us at
which maximum range it will operate best.
If we look at the pump curve for the pump which is
to be installed…we can easily determine the pump
cut-in pressure (P
2
) and pump cut-out pressure (P
3
)
that will give us the widest range.
GROUND LEVEL
STATIC
WATER
LEVEL
PUMPING LEVEL
OR LIFT
PUMP
DEPTH
WELL
DEPTH
240 FT.
(In example)
36"
84"
WX-423
1489 LBS.
275 GALS.
TOTAL VOLUME
48"
AIR COMPRESSOR
900 GALLON
GALVANIZED TANK
168"
10,000 LBS. (WITH WATER)
0
100
200
300
400
500
600
700
20 40 60 80 100 120 140
20
40
60
80
TOT
AL HEAD IN FEET
CAPACITY IN GPM
EFFICIENCY
%
EFF.