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Section 4: Mechanical Installation
Purge Orifice Size Identification
•
Reference figure 4.11 and the Purge Plug Identification Table.
•
Each dryer is pre-set with the correctly sized purge valve for an operating pressure of 100 psig (7 barg) at point of order.
•
The lettering (A through S), located on the purge valve body, indicates the orifice size selected to suit the operating pressure of the dryer per the chart
below.
•
If the inlet pressure to the dryer will be different than the pre-set orifice size, the purge valve can be adjusted.
•
Dryers use a single orifice purge valve represented by the Red and Blue single letter references in the table below.
•
To select the correct orifice size, locate the appropriate dryer model at the left side of the table and then the operating pressure at the top.
•
Make sure that the correct orifice disc (01, 02) has been supplied with the dryer. The discs have the number (01, 02) stamped out at the top.
Purge Plug Identification
Operating
58 (4)
pressure psig (barg)
Dryer
M
ACC 46
P
ACC 56
B
ACC 75
C
ACC 90
I
ACC 110
HYG-BLEED
1 ½
Disc
01
02
Every dryer is shipped with a purge orifice set up for 100 psig (7 barg) operation. The dryer will also include the necessary purge valve components
to configure the dryer to operate at any pressure from 58 psig (4 barg) to 189 psig (13 barg). For example: A 110 SCFM dryer will be supplied with a
single hole purge assembly with an 02 purge disc installed and indexed to position A. Additional purge valve components will be included to allow
the dryer to be configured to purge settings,
CK, M, G, C, B, A, S, S and P.
Appropriate purge plug selection is very important for function of the dryer. Failure to comply with this may affect your warranty.
18
73 (5)
86 (6)
102 (7)
K
I
H
M
L
K
S
P
M
A
P
P
E
C
A
1
/
1
/
1 ½
1
1
4
4
116 (8
131 (9)
145 (10)
G
F
E
J
I
H
L
L
K
N
L
K
P
M
K
1 ½
/
/
3
3
4
4
Heatless Desiccant Dryers |
160 (11)
174 (12)
189 (13)
E
E
D
G
F
F
I
I
H
J
I
H
K
J
I
/
/
/
3
3
1
4
4
2
Instruction Manual
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