Datasheet

w
w
e
q
r
e
q
r
o
t
K
C
O
L
H
S
U
P
SMC
A
A
A-A
w
q
w
q
w
372
Series AW10 to AW60
Series AW20K to AW60K
Working Principle (Filter Regulator with Backflow Function)
AW10
IN
(Inlet pressure)
OUT
(Outlet pressure)
IN
(Inlet pressure)
OUT
(Outlet pressure)
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 the valve
q is the valve spring force w only. When the 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 valve spring w force.
Inlet pressure
(IN)
Pressure in
diaphragm chamber
Inlet pressure
(IN)
Pressure in
diaphragm chamber
Figure 2 Backflow
IN
(Inlet pressure)
OUT
(Outlet pressure)
Figure 1 Normal
IN
(Inlet pressure)
OUT
(Outlet pressure)
AW20K to AW60K
When the inlet pressure is higher than the regulating pressure, the check valve w closes and operates as a normal regulator (Figure 1).
When the inlet pressure 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 the 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).
P0365-P0446-E.qxd 08.11.6 2:09 PM Page 372