Datasheet

Orange mark
Design
Warning
1. Be sure to install a safety device to prevent damage
or malfunction of the outlet side components when
the output pressure exceeds the set pressure value.
2. Please consult with SMC if the intended application
calls for absolutely zero leakage due to special at-
mospheric requirements, or if the use of a fluid ot-
her than air is required.
Selection
Warning
1. The mineral grease used on internal sliding parts
and seals may run down to outlet side components.
Please consult with SMC if this is not desirable.
2. Residual pressure release (outlet pressure release)
is not complete by releasing the inlet pressure.
To release residual pressure, select a model with a backflow
function. Using a model without a backflow function makes for
inconsistent residual pressure release (i.e., residual pressure
may or may not be released) depending upon the operating
conditions.
3. Please contact SMC if air will not be consumed in
the system for a long period of time, or if the outlet
side will be used with a sealed circuit and a balan-
ced circuit, as this may cause the set pressure of
the outlet side to fluctuate.
4. Set the regulating pressure range for the outlet
pressure of the regulator in a range that is 90% or
less of the inlet pressure.
If set to above 90%, the outlet pressure will be easily affected
by fluctuations in the flow rate and inlet pressure, and become
unstable.
5. A safety margin is calculated into the maximum re-
gulating pressure range appearing in the catalo
-
gue’s specification table.
However, the outlet pressure may exceed the set pressure
due to a delay in the valve’s closing.
6. Please contact SMC when a circuit requires the use
of a regulator having relief sensitivity with high pre-
cision and setting accuracy.
Mounting
Caution
1. To avoid reversed connections of the air inlet/outlet,
make connections after confirming the “IN/OUT”
mark or arrows that indicate the direction of air
flow. Reversed connections can cause malfunction.
2. Leave a space of 100 mm or more for maintenance
on the valve guide side (opposite side from the
knob).
3. When the product is installed between a solenoid
valve and an actuator, select a backflow function
type.
Caution
1. Select a model that is suitable for the desired clean-
liness by referring to the SMC’s Best Pneumatics
catalogue.
2. Components cannot be used for applications that
are outside the range of the specifications.
Please consult with SMC when you anticipate using the com-
ponent outside the range of its specifications (such as tempe-
rature and pressure).
3. Even when the product is used in the specified ran-
ge, it may chatter depending on the operating con-
ditions. Please contact SMC for the details of this
chattering.
Adjustment
Warning
1. Set the regulator while verifying the displayed va-
lues of the inlet and outlet pressure gauges.
Turning the knob excessively can cause damage to the inter-
nal parts.
2. Do not use a tool on the pressure regulator knob as
this can cause damage.
It must be operated ma-
nually.
Caution
1. Be sure to check the inlet pressure before setting
the outlet pressure.
2. Be sure to unlock the knob before adjusting the
pressure and lock it after setting the pressure.
Failure to follow this procedure can cause damage to the knob
and the outlet pressure may fluctuate.
• Pull the pressure regulator knob to unlock. (You can visually
verify this with the “orange mark” that appears in the gap.)
• Push the pressure regulator knob to lock. When the knob is
not easily locked, turn it left and right a little and then push it
(when the knob
is locked, the “orange mark”, i.e., the gap
will disappear).
3. To set the pressure using the knob, turn the knob in
the direction that increases pressure and lock the
knob after the pressure is set.
If this is done in the direction that decreases pressure, the
pressure may drop from the original set pressure. Turning the
knob clockwise increases the outlet pressure, and turning it
counterclockwise reduces the pressure.
4. Do not apply pressure exceeding the range of spe-
cifications.
It can damage the pressure gauge.
Series ARP20/30/40
Specific Product Precautions 1
Be sure to read this before handling. Refer to the back of pages 1 and 2 for Safety
Instructions and “Precautions for Handling Pneumatic Devices” (M-03-E3A) for Common
Precautions.
Piping
Warning
1. To screw piping materials into components, tighten
with a recommended tightening torque while hol-
ding the female thread side.
If the minimum tightening torque is not observed, this can cau-
se a looseness and seal failure. On the other hand, excess
tightening torque can cause damage to the threads. Further-
more, tightening without holding the female thread side can
cause damage due to the excess force that is applied directly
to the piping bracket.
2. Avoid excessive torsional moment or bending mo-
ment other than those caused by the equipment’s
own weight as this can cause damage.
Support external piping separately.
3. Piping materials without flexibility such as steel tu-
be piping are prone to be affected by excess mo-
ment load and vibration from the piping side. Use
flexible tubing in between to avoid such an effect.
Maintenance
Warning
1. When disassembly or installation is required during
the maintenance, repair, or replacement of a device,
be sure to follow the instructions provided in the
operation manual or safety instructions in this cata-
logue.
2. When using the regulator with a backflow function
between a solenoid valve and an actuator, check
the pressure gauge periodically.
Sudden pressure fluctuations may shorten the durability of the
pressure gauge.
A digital pressure gauge is recommended for
such situation or as deemed necessary.
Caution
1. For emergency action in the event of setting failure
or leakage from the relief port, refer to
“Troubleshooting” in the Operation Manual of the
product.
Recommended Tightening Torque
Connection
thread
Torque
1/2
3/81/41/8
28 to 30
22 to 2412 to 147 to 9
Unit: N·m
Air Supply
Warning
1. Use a mist separator on the inlet side of the pro-
duct.
If the supplied air contains condensate or dust, the bleed me-
chanism can malfunction.
2. Do not use a lubricator on the inlet side of the pro-
duct, as the bleed mechanism can malfunction.
Adjustment
Caution
5. The product consumes a small amount of fluid from
the bleed port.
The product is designed to have a bleed mechanism for highly
accurate pressure adjustment, and consumes a small amount
of fluid from the bleed port. This should not be considered ab-
normal.
Series ARP20/30/40
Specific Product Precautions 2
Be sure to read this before handling. Refer to the back of pages 1 and 2 for Safety
Instructions and “Precautions for Handling Pneumatic Devices” (M-03-E3A) for Common
Precautions.
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