AR20-N02BE-Z SMC Corporation, AR20-N02BE-Z Datasheet - Page 8

• Manufacturer Part Number: AR20-N02BE-Z
• Description: AIR REGULATOR, 1/4NPT PORT, BRACKET, GAUGE, PSI, F
• Manufacturer: SMC Corporation

Series
Series
Working Principle (Regulator with Backflow Mechanism)
AR10
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.
AR20K to AR60K
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).
47
IN
(Inlet
pressure)
IN
(Inlet
pressure)
AR10
AR20K
Figure 1 Normal
w
pressure
Inlet
Figure 1
(IN)
to
SM
C
to
A
A
Pressure in
diaphragm
chamber
AR60
AR60K
w
q
OUT
(Outlet
pressure)
r
q
e
OUT
(Outlet
pressure)
IN
(Inlet
pressure)
w
IN
Figure 2 Back flow
w
pressure
Inlet
(IN)
Figure 2
A-A
Pressure in
diaphragm
chamber
w
q
OUT
OUT
(Outlet
pressure)
r
q
e