[SM-206790-A/5]
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OPERATION
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5.3 Air Quality
a) Do not supply anything other than compressed air.
b) Supply clean compressed air without any mixture of
corrosive gas.
a) Compressed air usually contains a large amount of
drain, oxidized oil, tar, foreign matter, and rust from
the piping. Filter out those elements in the supplied
air because they may cause a malfunction and de-
crease service life. In addition, clean the exhaust
before it is released to the air to minimize pollution.
b) Once you have lubricated a pre-lubricated valve, the
valve is no longer capable of running without being lu-
bricated from the outside. Do not leave the valve
without lubrication but keep it lubricated.
c) Do not use spindle oil or machine oil. They may in-
duce expansion of the rubber parts, which may cause
a malfunction.
5.3.1 Lubrication
The 4KA2
、
4KB2 Series solenoid valve systems use pre-lubricated valves that
usually do not require lubrication from the outside. If you have to lubricate
a valve, use Type 1 turbine oil (ISO-VG32) without additives.
Excessive lubrication and extremely low pressure may cause a longer re-
sponse time. The response time in the catalogue assumes no lubrication
from the outside and the air supply pressure of 0.5 MPa.
5.3.2 Ultra-dry compressed air
The use of ultra-dry compressed air will cause splashing of the lubrication oil
and result in a shorter service life.
5.3.3 Drain
(1) The drain is produced by a drop of temperature in pneumatic piping and de-
vices.
(2) The drain may enter and instantaneously block a passage inside a pneumatic
device and cause a malfunction.
(3) The drain accelerates the production of rust, which may cause the failure of
pneumatic devices.
(4) The drain may wash away the lubrication oil, causing a malfunction from the
lack of lubrication.
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WARNING :
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CAUTION :
