Instruction Manual

6
6
Change-out Schedule for FLO-DRI
6
Change-out Schedule for FLO-DRI / To Order
F. CHANGE-OUT SCHEDULE FOR FLO-DRI
Table5, page6 shows cartridge change-out frequencies
in days for each model heater and gas scrubber for H
2
S and
moisture.
To determine the cartridge change-out frequency in days for
other H
2
S moisture concentrations, use the formulas provided
in the examples.
Table5 – Flo-Dri Cartridge Change Schedule in Days
WX
Series
Rating
(Btu/
hr)
Sour Gas H
2
S Moisture (50ppm)
FloDri-
10MS
Days
FloDri-
25MS
Days
FloDri-
10MS
Days
FloDri-
25MS
Days
6x6 1,250 450 1,167 360 934
6x12 2,500 225 583 180 467
6x24 5,000 112 291 90 233
8x8 2,222 253 656 202 525
10x12 4,167 135 350 108 280
12x12 5,000 112 291 90 233
12x24 10,000 56 145 45 116
12x36 15,000 37 97 30 77
12x48 20,000 28 72 22 58
12x60 25,000 22 58 18 46
12x72 30,000 18 48 15 38
18x24 15,000 37 97 30 77
18x30 18,750 30 77 24 62
18x36 22,500 25 64 20 51
18x48 30,000 18 48 15 38
18x60 37, 500 15 38 12 31
18x72 45,000 12 32 10 25
24x24 20,000 28 72 22 58
24x30 25,000 22 58 18 46
24x36 30,000 18 48 15 38
24x48 40,000 14 36 11 29
24x60 50,000 11 29 9 23
24x72 60,000 9 24 7 19
Example 1: Sour Gas H
2
S
H
2
S in Gas Supply
10 ppm
Change-out Frequency =
# Days (Table5)
x
Your installation has a Cata-Dyne
TM
heater, model WX 12x24,
10,000 Btu/hr (2.928 kW/hr) natural gas using a model
FloDri-10MS cartridge.
– The concentration of H
2
S in your gas supply is 25
ppm.
– The change-out frequency for 10 ppm is 70 days
(derived from Table5).
– COF = 56 days x (10 ppm/25 ppm) = 22 days
– The FLO-DRI-10MS scrubber cartridge should be
changed once every 22 days.
Example 2: Moisture
Moisture in Gas Supply
50 ppm
Change-out Frequency =
# Days (Table5)
x
Your installation has a Cata-Dyne
TM
heater, model WX 12x24,
10,000 Btu/hr (2.928 kW/hr) natural gas using a model
FloDri-10MS cartridge.
– The concentration of H
2
S in your gas supply is 25
ppm.
– The change-out frequency for 50 ppm is 45 days
(derived from Table5).
– COF = 45 days x (50 ppm/25 ppm) = 90 days
– The FloDri-10MS scrubber cartridge should be
changed once every 90 days.
G. TO ORDER
Model number and cartridge media part number.