Piping
Warning
○
Air combination
(1)
Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to
remove chips, cutting oil and solid foreign material from inside the pipe. Contamination of
piping may cause damage or malfunction.
(2)
When screwing together pipes and fittings, etc., be certain that chips from the pipe threads
and sealant do not get inside the pipe. When a sealant tape is used, leave 1.5 to 2 thread
ridges exposed at the end of the threads.
(3)
Connect piping/fittings using the recommended torque while holding the female thread side
tightly. Insufficient tightening torque leads to cause of loosening or sealing failure, and
excessive tightening torque leads to cause of breakage of screws. Tightening without holding
female thread applies an excessive force to the piping bracket directly, leading to breakage.
Recommended tightening torque
Unit: N m
Thread size
1/8
1/4
3/8
1/2
3/4
1
Torque
3 to 5
8 to 12
15 to 20
20 to 25
28 to 30
36 to 38
(4)
Before using an SMC fitting and S coupler, please refer to "Tightening the threaded portion of
the connection thread" of the Fittings & Tubing Precautions.
(5)
Do not apply torsion or bending moment other than the weight of the product itself. External
piping needs to be supported separately as it may cause breakage. If moment applied to the
equipment is unavoidable during operation, the moment should be lower than the maximum
moment shown below. Non-flexible piping like steel tube is susceptible to excessive moment
load or vibration. Insert flexible tubes to prevent this.
Body size
20
30
40
40-06
50
60
Max. moment (M) [N m]
14.5
16
19.5
35
45
45
Max. moment (M) = Length (L) x Load (F)
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Air filter, filter regulator and mist separator
(1)
Drain guide is not equipped with valve function. Be sure to connect piping for drain. No piping
for drain allows the drain and compressed air to exhaust freely. Also, the piping installation
should be performed with drain guide held by spanner to prevent breakage of bowl.
(2)
The piping for drain from auto drain should be connected under the following requirements to
avoid operating failure.
Tubing for AD27-D: I.D. ø2.5 (ø3/32") or larger, Length 5 m (200 inch) or shorter
Tubing for AD37, 47(N)-D: I.D. ø4 (ø3/16") or larger, Length 5 m (200 inch) or shorter
Tubing for AD38, 48(N)-D: I.D. ø6.5 (ø1/4") or larger, Length 5 m (200 inch) or shorter
Caution
○
Lubricator
(1)
Avoid rising piping and piping branches on the outlet piping. Otherwise, lubricating failure may
occur.
Load (F)
-8-
Length (L)
