Datasheet
Working Principle (Regulator with Backflow Function)
AR10
AR20K to AR60K
When the inlet pressure is higher than the regulating pressure, check valve w closes and operates as a normal regulator (Figure 1).
When the inlet pressure is shut off and released, check valve w opens and the pressure in diaphragm chamber q is released into the
inlet side (Figure 2).
This lowers the pressure in diaphragm chamber q and the force generated by pressure regulator spring e lifts the diaphragm. Valve r
opens through the stem, and the outlet pressure is released to the inlet side (Figure 2).
When the inlet pressure is higher than the regulating pressure, the check valve operates as a normal regulator (Figure 1).
When the inlet pressure is shut off and exhausted, any inlet pressure applied to the valve q will be lost. The force for seating valve q is
the valve spring w force only. When valve q is opened using the outlet force, the outlet pressure will be exhausted at the inlet side.
(Figure 2)
When the set pressure is 0.15 MPa or less, valve q may not open due to the force of valve spring w.
Figure 2
w
q
Figure 1
q
w
CSM
2 OUT
1 I N
A
A
Figure 2 Backflow
r
q
e
IN OUT
w
Pressure in
diaphragm chamber
Inlet pressure
(IN)
Pressure in
diaphragm chamber
Inlet pressure
(IN)
w
Figure 1 Normal
r
q
e
A-A
w
IN
(Inlet pressure)
OUT
(Outlet pressure)
IN
(Inlet pressure)
OUT
(Outlet pressure)
IN
(Inlet pressure)
OUT
(Outlet pressure)
Series AR10 to AR60
Series AR20K to AR60K
Dimensions
AR10, AR20(K) to AR40(K)-06
AR50(K), AR60(K)
Model
Standard specifications
Optional specifications
Square type
pressure gauge
Digital
pressure switch
Round type
pressure gauge
P1 P2 A
B
Note 1)
C D K
M5 x 0.8
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/4, 3/8, 1/2
3/4
3/4, 1
1
1/16
1/8
1/8
1/8
1/4
1/4
1/4
1/4
25
40
53
53
70
75
90
95
58
94
101
116
128
129
169
176
11
26.5
28
31
36
36
43
46
12.5
28.5
27.5
29.5
34
34
43.5
43.5
F
M18 x 1
M28 x
1
M32 x 1.5
M38 x 1.5
M42 x 1.5
M42 x 1.5
M62 x 1.5
M62 x 1.5
0
2
0
3.5
3.5
3
3.3
3.3
Note 2)
J
13
28.5
27.5
29.5
34
34
43.5
43.5
H
—
28
28
28
28
28
28
28
J
—
29.5
28.5
30.5
35
35
44.5
44.5
H
—
27.8
27.8
27.8
27.8
27.8
27.8
27.8
J
—
40
39
41
45
45
55
55
Round type pressure
gauge (with colour zone)
H
—
ø37.5
ø37.5
ø37.5
ø42.5
ø42.5
ø42.5
ø42.5
J
—
65
64
66
74
74
84
84
H
ø26
ø37.5
ø37.5
ø37.5
ø42.5
ø42.5
ø42.5
ø42.5
J
26
65
64
66
74
74
84
84
AR10
AR20(K)
AR25(K)
AR30(K)
AR40(K)
AR40(K)-06
AR50(K)
AR60(K)
Model
M N Q R S
25
30
30
41
50
50
70
70
28
34
34
40
54
54
66
66
30
44
44
46
54
56
65.8
65.8
4.5
5.4
5.4
6.5
8.5
8.5
11
11
6.5
15.4
15.4
8
10.5
10.5
13
13
T
40
55
55
53
70
70
90
90
U
2
2.3
2.3
2.3
2.3
2.3
3.2
3.2
V
18
25
26
31
35.5
37
—
—
W
18.5
28.5
32.5
38.5
42.5
42.5
—
—
Y
—
14
16
19
21
21
—
—
Z
—
6
6
7
7
7
—
—
AR10
AR20(K)
AR25(K)
AR30(K)
AR40(K)
AR40(K)-06
AR50(K)
AR60(K)
Optional specifications
Bracket mount Panel mount
Note 1) The total length of B dimension is the length when the filter regulator knob is unlocked.
Note 2) For the AR20 only, the position of the pressure gauge is above the centre of the piping.
Digital pressure switch
Square embedded type pressure gauge
Option Round type pressure gauge
Dimensions
Applicable model
AR20(K) to AR60(K) AR10, AR20(K) to AR60(K)
Round type pressure gauge (with colour zone)
AR20(K) to AR60(K)
J
H
Centre of
piping
J
H
Centre of
piping
J
H
Centre of
piping
IN
OUT
A
S
R
N
T
P2
(Pressure gauge
port size)
IN
OUT
A
S
R
T
N
P2
(Pressure gauge
port size)
Y
W
AR10, AR20(K) to AR30(K): Max. 3.5
AR40(K): Max. 5
Plate thickness
Panel fitting dimension
Z
IN
OUT
D
K
U
M
Q
J
V
C
B
2 x
P1
(Port size)
Bracket
(Option)
F
D
K
U
MJ
Q C
B
Bracket
(Option)
2 x P1
(Port size)
F
Regulator
Series AR10 to AR60
Regulator with Backflow Function
Series AR20K to AR60K
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