Piping; Wiring - SMC Networks V100 Series Operation Manual

V100 Series
Precautions for 3 Port Solenoid Valve 3

Piping

1. Refer to the Fittings and Tubing Precautions for
handling One-touch fittings.
2. Preparation before piping
Before piping is connected, it should be thoroughly blown out
with air (flushing) or washed to remove chips, cutting oil, and
other debris from inside the pipe.
3．Winding of sealant tape
When screwing piping or fittings
into ports, ensure that chips from
the pipe threads or sealing
material do not enter the piping.
Also, if sealant tape is used,
leave 1 thread ridge exposed
at the end of the threads.
4. Connection of piping and fittings
When screwing piping or fittings into the valve, tighten them
as follows.
1)
When using SMC's M5 fittings, follow the procedures
below to tighten them.
• Connection thread: M5
First, tighten by hand, then use a suitable wrench to
tighten the hexagonal portion of the body an
additional 1/6 to 1/4 turn. The reference value for the
∗ Excessive tightening may damage the thread portion
tightening torque is 1 to 1.5 N·m
or deform the gasket and cause air
leakage.Insufficient tightening may loosen the
threads or cause air leakage.
・When using a fitting other than an SMC fitting,
follow the instructions given by the fitting
manufacturer.
2)
For a fitting with sealant R or NPT, first, tighten it by
hand, then use a suitable wrench to tighten the
hexagonal portion of the body an additional two or
three turns. For the tightening torque, refer to the table
below.
Connection thread size
(R, NPT)
1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
3)
If the fitting is tightened with excessive torque, a large
amount of sealant will seep out. Remove the excess
sealant.
4)
Insufficient tightening may cause seal failure or loosen
the threads.
Be sure to read before handling.
Proper tightening torque
(N·m)
3 to 5
8 to 12
15 to 20
20 to 25
28 to 30
36 to 38
40 to 42
48 to 50
48 to 50
5)
For reuse
(1) Normally, fittings with a sealant can be reused up
to 2 to 3 times.
(2) To prevent air leakage through the sealant,
remove any loose sealant stuck to the fitting by
blowing air over the threaded portion.
(3) If the sealant no longer provides effective sealing,
wind sealing tape over the sealant before reusing.
Do not use any form of sealant other than the tape
type of sealant.
(4) Once the fitting has been tightened, backing it out
to its original position often causes the sealant to
become defective. Air leakage will occur.
5. Piping to products
When piping to a product, refer to the operation manual to
avoid mistakes regarding the supply port, etc.
1. The solenoid valve is an electrical product. For
safety, install an appropriate fuse and circuit
breaker before use.
1. Polarity
When connecting power to a solenoid valve with a DC
specification and a light or surge voltage suppressor, check
for polarity. If there is polarity, take note of the following.
Without diode to protect polarity:
If a mistake is made regarding the polarity, damage may
occur to the diode in the valve, the switching element in the
control device, power supply equipment, etc.
With diode to protect polarity:
If the polarity connection is wrong, the valve will not operate.
2. Applied voltage
When electric power is connected to a solenoid valve, be
careful to apply the proper voltage. Improper voltage may
cause malfunction or coil damage.
3. Check the connections.
Check if the connections are correct after completing all

wiring.

4. External force applied to the lead wire
If an excessive force is applied to the lead wire, this may
cause faulty wiring. Take appropriate measures so that a
force of 30 N or more is not applied to the lead wire. When
instructions are given in the Specific Product Precautions,
follow these specifications.
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Wiring
No.V100-OMV0001