Specific Product Precautions 1 - SMC Networks VNC Series Operation Manual

Warning
1. Extended periods of continuous energization
If a valve is continuously energized for long periods, heat
generation of the coil may result in reduced performance and
shorter service life. This may also have an adverse effect on the
peripheral equipment in proximity. Should a valve be con-
tinuously energized for long periods, or its daily energized state
exceeds its non energized state, please use an energy saving
type AC, energizing for long periods of time continuously, select
the air-operated valve and use the continuous duty type of the
VT307 for a pilot valve.
Mounting
Warning
1. Do not apply external force to the coil section.
When tightening is performed, apply a wrench or other tool to
the outside of the piping connection parts.
2 Do not warm the coil assembly with a heat
insulator, etc.
Use tape, heaters, etc., for freeze prevention on the piping and
body only. They can cause the coil to bum out.
3 Avoid sources of vibration, or adjust the arm
from the body to the minimum length so that
resonance will not occur.
4. Mount a valve with its coil position upwards,
not downwards.
5. Mount the VNH series vertically top side up.
Caution
1. 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.
2. Confirm the connections.
After completing the wiring, confirm that the connections are
correct.
Caution
When high temperature fluids are used, use fittings and tubing
with heat resistant features. (Self-align fittings, fluoropolymer
tubing, Copper piping, etc.)
VNC / VNH Series
Solenoid Valves for Fluid Control

Specific Product Precautions 1

Be sure to read this before handling.
Design
Wiring
Piping
Mounting Direction of Pilot Solenoid Valve
Warning
If the product is an external type pilot, it is not splash proof. Be
careful not to expose it to any fluid when maintaining the valve.
Caution
When replacing a valve, if an external pilot solenoid valve is
mounted in the wrong direction, it may malfunction or leak air.
Caution
Pilot port 12(P1) and 10(P2) piping
P1 and P2 piping should be as follows according to the model.
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Installing a silencer to the exhaust port and the bleed port is
recommended for noise reduction and for dust entry prevention.
Quality of Operating Fluid
Caution
Please note that using fluids that contain foreign mterial
(especially hard objects like glass chips), may cause damage to
the valve, will reduce sealing performance, and may cause early
failure.
Back Pressure of 3 port Valve (Series VNH)
Caution
1).Ensure that back pressure of 3(B) port from VNH□13 is less
than 5 MPa.
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External Pilot
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