SM-P00077-A/3
2. INSTALLATION
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2020-04-15
2.4
Piping
CAUTION
Tighten the pipes/tubes with the appropriate tightening torque.
Observe the appropriate tightening torque to prevent air leakage and damage to the threads. To
prevent damage to the screw threads, first use your hands to lightly tighten the pipe/tube and then
use a tool to tighten the pipe/tube further.
Make sure that the pipes/tubes will not be disconnected at the joints by mechanical
movements, vibrations or tension.
• If the exhaust piping of the pneumatic pressure circuit is disconnected, the actuator speed
cannot be controlled.
• For the chuck holding mechanism, the chuck holding force is lost when the piping is
disconnected.
When supplying compressed air for the first time after piping is complete, make sure that
there is no air leakage at the joints.
Do not apply high pressure suddenly when supplying compressed air for the first time after
connecting the pipes/tubes.
Sudden introduction of highly-pressurized air may cause the tubes to become disconnected and
jump around and an accident may occur.
Do not decrease the inside diameter of the piping from any of the solenoid valve exhaust
ports to a diameter less than the piping port size.
Smooth exhaust flow is important for normal operation of the actuator. With a manifold, a
restriction to the exhaust flow may prevent normal operation of other solenoid valves.
Remove foreign matter.
Rust and other foreign matters in the piping may cause a malfunction or valve seat leakage.
Insert a filter (which removes particles exceeding 5 μm) immediately upstream of the solenoid
valve.
Do not restrict the flow of air through the supply piping.
A delay in operation may occur due to a drop in the supply pressure when multiple valves are
operated.
2.4.1
Recommended tightening torque
The following table shows the tightening torque for each connection thread.
Connection thread
Tightening torque (N·m)
M5
1.0 to 1.5
Rc1/8
3 to 5
Rc1/4
6 to 8
Rc3/8
13 to 15
