SMC Networks AR20 Series Operation Manual page 5

Warning
(1) Polyacetal resin parts are used for the exterior. Organic solvents including thinner, acetone,
alcohol and ethylene chloride; chemicals including sulphuric acid, nitric acid and hydrochloric acid;
cutting oil, synthetic oils, ester-based compressor oil, alkali, kerosene, gasoline, lock material of
screw are harmful. Do not use the product where these are present.
(2) Consult SMC if no leakage is allowed due to the environment, or if the operating fluid is not air.
(3) Shield from ultra violet light and radiation with protective cover.
(4) A safety device needs to be installed if output pressure is exceeding the set pressure, otherwise
this can cause breakage of outlet device and equipment or lead to malfunction.
Caution
Allowed air consumption from the exhaust port is 0.1 L/min(ANR) or less.
(1)
Warning
(1) Grease used on the internal sliding parts and seals may flow to the outlet side. If this is not
acceptable, please consult SMC.
(2) Residual pressure of product without backflow function is released unstably even though the inlet
pressure is released (residual pressure might be left in the product). Please select product with
backflow function to release the residual pressure completely.
(3) Long absence of operation or operation with sealed circuit or balancing circuit on the outlet side
may cause set pressure fluctuation. Please consult SMC if this is not acceptable.
(4) Set range of outlet pressure shall be 85% or less of the inlet pressure. Operating at a setting
exceeding 85% causes the outlet pressure to be easily affected by fluctuations in flow rate and inlet
pressure, leading to instability.
(5) Since the safety margin is calculated to the maximum value of the set pressure range shown in the
specification table, the pressure setting may be over the maximum value. However, use the
product within the specified range.
(6) If the product is used with circuit which requires high exhaust sensitivity or set precision, please
consult SMC.
Warning
(1) Connect the product ensuring the direction of "1"(IN) and "2"(OUT) for air direction and indicated
arrow. Incorrect connections may cause malfunction.
(2) Install with enough space around the regulator to perform regular maintenance and operation.
Refer to the dimensional drawings (P26-28) for necessary space.
(3) Do not drop or apply impact during transportation or installation. Damage of products or pressure
gauge can result in malfunction.
(4) Do not install in areas with high humidity or high temperature. It may lead to a malfunction of the
pressure gauge.
Precautions for Design
Selection
Installation
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