Van Air Systems PLD 8-7.2 / 36-7.2 - Manual (Page 6)

PAGE 6
FIGURE 4-A BED LEVEL DETAIL
The level of the desiccant bed should be maintained as close to
the MAXIMUM level as possible. The bed level should not be
allowed to fall below the MINIMUM level. Dehydrator performance
will be effected. Reference Figure 4-A for levels and quantities.
With the fi ll port cover removed, use a measuring stick to deter-
mine the distance from the top of the fi ll opening to the top of the
desiccant bed. Reference Figure 4-A. Add desiccant as required
to bring desiccant bed to maximum level.
CAUTION
Never fi ll the vessel above the MAXIMUM LEVEL.
Filling the vessel above the MAXIMUM level may
effect the performance of the dehydrator.
The desiccant bed level should be checked regularly. Section
4.5 DESICCANT CONSUMPTION will help you estimate the
amount of desiccant that the dehydrator should use, based on
operating conditions.
4.5 DESICCANT CONSUMPTION
Consumption rate based on average conditions. Actual condi-
tions can vary.
4.4 BED LEVEL GUIDE
MODEL
PLD 8-7.2
PLD 12-7.2
PLD 16-7.2
PLD 20-7.2
PLD 24-7.2
PLD 30-7.2
PLD 36-7.2
C
Dim. To
MIN LEVEL
31-1/16"
30-3/8"
31-1/4"
30-1/4"
31-1/2"
33-1/16"
34-7/8"
MODEL
PLD 8-7.2
PLD 12-7.2
PLD 16-7.2
PLD 20-7.2
PLD 24-7.2
PLD 30-7.2
PLD 36-7.2
PRE-BED
CERAMIC
BEAD
16 LBS
35 LBS
55 LBS
89 LBS
126 LBS
199 LBS
318 LBS
DRYING
GASDRY
PEAK
48 LBS
148 LBS
236 LBS
379 LBS
537 LBS
853 LBS
1361 LBS
DRYING
GASDRY
MAX
52 LBS
161 LBS
258 LBS
413 LBS
586 LBS
930 LBS
1484 LBS
B
Dim. To
Pre-Bed
46-1/16"
51-3/8"
52-1/4"
51-1/4"
52-1/2"
54-1/16"
55-7/8"
DRYER DIMENSIONS- INCHES
D
Dim. To
MAX LEVEL
16-1/16"
10-3/8"
10-1/4"
9-1/4"
10-1/2"
12-1/16"
13-7/8"
A
Dim. To
Grid
52-1/16"
57-3/8"
58-1/4"
57-1/4"
58-1/2"
60-1/16"
61-7/8"
4.5-A GASDRY PRIME DESICCANT
This general purpose tablet is recommended for installations
where inlet gas temperature is 100
o F or lower. Depending on the
pressure and temperature, GasDry Prime can provide a residual
moisture content below 9 lbs/mmscf.
Chart 1 shows the level of dryness that GasDry Prime will provide
at different conditions.
Chart 2 shows an approximate consumption rate for GasDry Prime
at several conditions. Use the charts for guidelines to calculate the
approximate consumption rate of the desiccant.
CHART 1
MOISTURE CONTENT OF GAS (LBS. H2O/MMSCF)
AFTER DEHYDRATOR WITH GASDRY PRIME
INLET
TEMP
100 o F
95 o F
90 o F
85 o F
80 o F
75 o F
70 o F
65 o F
60 o F
55 o F
50 o F
200
PSIG
124.0
106.6
91.7
78.4
67.0
56.9
48.2
40.8
34.4
28.8
24.1
100
PSIG
224.7
193.1
165.9
141.6
120.8
102.5
86.6
73.2
61.7
51.4
43.0
400
PSIG
68.3
58.9
50.8
43.5
37.2
31.7
26.9
22.8
19.4
16.2
13.6
500
PSIG
56.6
48.8
42.2
36.1
31.0
26.5
22.5
19.1
16.2
13.6
11.5
600
PSIG
48.8
42.1
36.4
31.2
26.8
22.9
19.5
16.6
14.1
11.9
10.0
300
PSIG
87.2
75.1
64.7
55.4
47.4
40.3
34.2
29.0
24.5
20.5
17.2
720
PSIG
42.2
36.5
31.6
27.1
23.3
19.9
17.0
14.5
12.3
10.4
8.7
NOTE
MMSCF is 1,000,000 STANDARD CUBIC FEET
DRYING
GASDRY
PRIME
63 LBS
193 LBS
309 LBS
496 LBS
704 LBS
1116 LBS
1781 LBS