13
Technical notes
1.
Pre-filtration, including a water separator is essential to maintain dryer performance.
2.
An appropriate Water Separator must be installed. If bulk water enters the adsorption dryer it can cause heat
expansion to the desiccant, substantial rise in the dryer differential pressure, lead to poor outlet dewpoint, and
cause potential dryer failure.
3.
Walker Filtration recommends fitting an RXA dust filter to the outlet.
4.
Call your nearest Walker Filtration sales team for further information.
Operating pressure (PCF)
barg
4
5
6
7
8
9
10
11
12
13
psig
58
72
87
100
115
130
145
160
174
189
Correction factor
0.62
0.75
0.87
1
1.12
1.25
1.37
1.5
1.62
1.75
Temperature (TCF)
Celcius
°C
20
25
30
35
40
45
50
Farenheit
°F
68
77
86
95
104
113
122
Correction factor
1.3
1.2
1.1
1
0.75
0.65
0.45
Pressure dewpoint (DCF)
Celcius
°C
-20
-30
-40
-70
-74
Farenheit
°F
-4
-22
-40
-94
-100
Correction factor
1.23
1.2
1
0.8
0.77
Dryer correction factors
Section 3:
Technical Data
PD0046 - PD0360
To correctly select the PRODRY model suitable for your application the following information is required: Minimum
Inlet Pressure, Maximum Inlet Temperature, Maximum Compressor Inlet Flow and Required Pressure Dewpoint (PDP).
Requirements
Correction Factor
Maximum compressor inlet flow
56 scfm
-
Actual minimum inlet pressure
to the dryer
6 barg
PCF = 0.87
Maximum inlet temperature
25
°
C (77
°
F)
TCF = 1.2
Pressure dewpoint (PDP)
-74
°
C (-100
°
F)
DCF = 0.77
Corrected dryer flow rate
Appropriate Dryer Size
Dryer model is selected based on the corrected flow rate, i.e. PD0075.
Inlet flow rate
PCF x TCF x DCF
56
(0.87 x 1.2 x 0.77)
69.7 scfm
(118 Nm
³
/hr)
=
=
PRODRY Sizing Example