Brochure

Series AC21~41
F.R.L. Unit
2
How To Order
AC
31
B
N
03
DV
8
YZ
- X2217
——
—
Air Combination Unit
Note: Other sizes, thread forms, options, etc. may be possible,
please contact SMC for availability.
With External Epoxy Coating, Stainless Fasteners
Name Plate, Caution Plate On Bowl in psi, ˚F
NPT Threads
Body Size
Symbol
21
31
41
Size
1/8
3/8
1/2
Model Combination
Symbol
Nil
A
B
Model / Assembly Order
AF + AR + AL
AW + AL
AF + AR
Port Size
Symbol
02
03
04
Port Size
1/4
3/8
1/2
Applicable Body Size
21
31
41
Specifications
Body size
Operating specifications
Port size
Auto drain port (AF, AW)
Bowl type (AF, AL, AW)
Body material
Bowl material (AF, AL, AW)
Body, Bowl surface treatment
Bonnet (AR, AW)
Manual drain (AF, AW)
External screws
Individual mounting brackets
Panel mount nut (AR, AW)
Connector brackets (AC)
Fill plug (AL)
Sight dome (AL)
Sight glasshardware (AF,AL,AW)
21
31
41
AC21
AC31
AC41
AC
A*
140
181
238
AA**
190
245
322
B
160
220
239
C
73
86
92
E
—
30
38
F
45.5
58.5
75.5
G
40
55
80
J
26
29.5
37.5
K
5
3.5
1.5
M
30
41
50
N
51
64
81
Q
24
35
40
U
5
7
7
V
33
45
50
W
—
34.5
41
Same as standard - see catalog ES40-42D or NC160A
1/4” NPT
N/A
Metal
1/4” NPT
Metal with sight gauge
Die cast aluminum
Die cast aluminum
Epoxy resin coating
Polyacetal
POM
Stainless steel 410
Epoxy coated steel
POM
Die cast zinc (epoxy coated)
Stainless steel 304
Polycarbonate
Stainless steel 304
3/8” NPT
1/2” NPT
Bowl
Symbol
2
8
Description
Metal Bowl
Metal Bowl With Sight Glass
Applicable Body Size
21
31, 41
Residual Pressure Relief Valve
Symbol
Nil
V
Description
Without Valve
With Downstream Valve
Applicable Model Combo
All
All
Accessories
Symbol
Nil
C
D
Description
None
Float Auto Drain (N.C.)
Float Auto Drain (N.O.)
Applicable Body Size
All
31, 41
31, 41
Regulator Handle Orientation
Symbol
Nil
Y
Description
Downward Handle
Upward Handle
Dimensions - Refer to drawings on page 3
mm
AC21A
AC31A
AC41A
A*
90
117
154
AA**
140
181
238
B
160
220
239
C
73
86
92
E
—
30
38
F
45.5
58.5
75.5
G
40
55
80
J
26
29.5
37.5
K
5
3.5
1.5
M
30
41
50
N
51
64
81
Q
24
35
40
U
5
7
7
V
33
45
50
W
—
34.5
41
mm
AC21B
AC31B
AC41B
A*
90
117
154
AA**
140
181
238
B
160
220
239
C
73
86
92
E
—
30
38
F
45.5
58.5
75.5
G
40
55
80
J
26
29.5
37.5
K
5
3.5
1.5
M
30
41
50
N
51
64
81
Q
24
35
40
U
5
7
7
V
33
45
50
W
—
34.5
41
mm
AC-A
AC-B
*
Without relief valve option ** With relief valve option
* Without relief valve option ** With relief valve option
* Without relief valve option ** With relief valve option