Datasheet

Working Principle
AW20K to 40K
When the inlet pressure (P1) is higher than the set pressure, the check valve w closes and operates as a normal regulator (Figure 1).
When the inlet pressure (P1) is shut off and released, the check valve w, opens and the pressure in the diaphragm chamber q is released into
the inlet side (Figure 2).
This lowers the pressure in the 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 3).
No.
q
w
Component Parts
Body
Bonnet
Zinc die-casted
Aluminum die-casted Platinum silver
Black
Polyacetal
Material
AW20K AW30K AW40K AW40K-06
Description
Note 1) Including O-ring. Please contact SMC regarding the bowl assembly supply for PSI and °F unit
specifications.
Note 2) Bowl assembly includes a bowl guard (steel band material).
Note 3) Check valve assembly includes check valve cover, check valve body assembly and screws (2 pcs.).
Note 4) Assembly includes valve assembly, valve spring and stem assembly.
No.
e
r
t
y
u
i
Filter element
Diaphragm assembly
Bowl O-ring
Bowl assembly
(1)
Check valve assembly
(3)
Non-woven
fabric
Weatherability NBR
NBR
PC
POM, PBT
Valve assembly
Stainless steel
Brass, HNBR
Part no.
AW20K
AW20P-360AS
AF20P-060S
AR20P-150AS
C2SFP-260S
C2SF
AR20KP-020AS
AW30K
AW30P-360AS
AF30P-060S
AR30P-150AS
C3SFP-260S
C3SF
(2)
AR20KP-020AS
AW40K
AW40P-360AS
AF40P-060S
AR40P-150AS
C4SFP-260S
C4SF
(2)
AR20KP-020AS
AW40K-06
AW40P-380AS
AF40P-060S
AR40P-150AS
C4SFP-260S
C4SF
(2)
AR20KP-020AS
Description
Material
Note
Construction
Figure 2
IN
(Inlet pressure)
A
A
w
t
q
y
e
r
r
q
e
u
Back flow
Pressure in
diaphragm
chamber
Inlet pressure
(IN)
Figure 1
Normal
Pressure in
diaphragm
chamber
Inlet pressure
(IN)
A
A
OUT
(Outlet pressure)
OUT
(Outlet pressure)
IN
(Inlet pressure)
OUT
(Outlet pressure)
IN
(Inlet pressure)
o
t
K
C
O
L
H
S
U
P
SMC
o
t
K
C
O
L
H
S
U
P
SMC
i
w
Figure 3
A-A
A-A
(4) (4) (4) (4)
Series AW20K/30K/40K
14-2-76