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2.0 INSTALLATION
A.
Location:
The dryer should normally be placed upstream of a re-
ducing valve (regulator). For longest service life, all liquid
moisture in the air line must be removed prior to the
dryer inlet.
B.
Flow Direction:
Check that the unit is piped so that flow is
in the proper direction as indicated by the arrows on the
dryer head.
C.
Silica gel desiccant:
Silica gel desiccant is shipped in a separate container.
Before operating dryer, follow the steps to fill dryer with
initial charge of silica gel desiccant:
1.
Push up and rotate the bowl 1/8
E
clockwise to remove the bowl from the head.
2.
Fill bowl with new silica gel desiccant supplied with unit,
N
being careful not to get any desiccant down transfer
G
tube.
L
Model HDF1 requires 1 lb of silica gel desiccant.
I
Model HDF2 requires 2 lbs of silica gel desiccant.
Model HDF3 requires 4 lbs of silica gel desiccant.
S
Model HDF4 requires 6 lbs of silica gel desiccant.
H
NOTE: Dry (good) silica gel desiccant is translucent white with
blue beads interspersed. If the silica gel desiccant is pink or
no blue beads are present then the silica gel desiccant must
be replaced or regenerated.
3.0 OpERATION
A.
Paint Gun Arrangements with the HDF Dryer Systems
Model
Spray Gun Type
HDF1
Detail or small pressure feed
HDF2
Pressure or gravity feed
HDF3
HVLP
HDF4
HVLP
B.
Maximum scfm (m
Model
20 (1.4)
HDF1
1.5 (2.6)
HDF2
3.0 (5.1)
HDF3
6.1 (10.3)
HDF4
9.1 (15.4)
Table 1
Inlet Pressure = 100 psig (7 bar)
Rated life at Stated Flow = 500 minutes (8 hrs 20 min)
Inlet Temperature = 70°F (21°C)
Relative Humidity = 100%
Model
Rated scf (m
HDF1
2,500 (71)
HDF2
5,000 (142)
HDF3
10,000 (283)
HDF4
15,000 (425)
Table 2
Outlet dew point* with dry silica gel desiccant
Inlet Temp.
°F (°C)
35 (1.7)
Outlet A.D.P.*
°F (°C)
-60 (-51.1)
* Atmospheric Dew Point
2
of a turn counter-
th
Number of Guns
1
1
1
2
/hr) at various operating pressures
3
Pressure psig (bar)
40 (2.8)
60 (4.1)
2.4 (4.1)
3.3 (5.5)
4.8 (8.1)
6.5 (11.1)
9.5 (16.2)
13.0 (22.1)
14.3 (24.3)
19.5 (33.2)
)
3
40 (4.4)
50 (10.0)
60 (15.6)
-55 (-48.3)
-50 (-45.6)
-45 (-42.8)
C.
Silica Gel Desiccant Life:
Table 1 shows the theoretical life of the unit at the stated
operating conditions. Life of the silica gel desiccant will
vary depending on inlet flow, pressure and temperature.
Check with your local representative if additional opera-
tional information is required.
D.
Sight Glass – Moisture Indicator:
The silica gel desiccant is to be changed or regenerated
when the moisture indicator changes from blue (good) to
white (silica gel desiccant saturated).
E.
Regeneration of silica gel desiccant:
To regenerate the silica gel desiccant, bake the desiccant
for 4 hours at 250°F (121°C). Successfully regenerated
silica gel desiccant will be translucent white with blue
beads interspersed.
F.
Determining outlet dew point. With completely dry silica
gel desiccant, dryer outlet dew point is a function of inlet
temperature. While the silica gel desiccant is adsorbing
moisture a relatively constant dew point is maintained
until the desiccant bed nears saturation. At this point
the dew point begins to rise rapidly. Table 2 shows the
relationship of the inlet temperature to outlet dew point
with dry silica gel desiccant.
80 (5.5)
100 (6.9)
150 (10.3)
4.1 (7.0)
5.0 (8.5)
7.2 (12.2)
8.3 (14.0)
10.0 (17.0)
14.4 (24.4)
16.5 (28.1)
20.0 (34.0)
28.7 (48.8)
24.8 (42.1)
30.0 (51.0)
43.1 (73.2)
70 (21.1)
80 (26.7)
90 (32.2)
-40 (-40.0)
-35 (-37.2)
-30 (-34.4)
200 (13.8)
9.4 (15.9)
18.7 (31.8)
37.4 (63.6)
56.2 (95.4)
100 (37.8)
110 (43.3)
120 (48.9)
-25 (-31.7)
-20 (-28.9)
-15 (-26.1)
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