Caution
Warning
Warning
Design / Selection
1. Confirm the specifications.
Products represented in this manual are designed only for use
in compressed air systems.
Do not operate at pressures or temperatures, etc., beyond the
range of specifications, as this can cause damage or malfunction.
Please contact SMC when using a fluid other than compressed air.
We do not guarantee against any damage if the product is
used outside of the specification range.
2. Actuator drive
When an actuator, such as a cylinder, is to be driven using a valve,
take appropriate measures (cover installation or approach
prohibition) to prevent potential danger caused by actuator
operation.
3. Effects of back pressure when using a manifold
Use caution when valves are used on a manifold, because an
actuator may malfunction due to back-pressure. For single
acting cylinder, take appropriate measures to prevent malfunction
by using it with an individual exhaust manifold.
4. Holding of pressure
Since the valves are subject to air leakage, they cannot be
used for applications such as holding pressure in a pressure
vessel.
5. Not suitable for use as an emergency shut-off valve,
etc.
VTA301 series are not designed for safety applications such
as an emergency shutoff valve. If the valves are used for the
mentioned applications, additional safety measures should be
adopted.
6. Release of residual pressure
For maintenance purposes install a system for releasing
residual pressure.
Ensure that the residual pressure between the valve and the
cylinder is released.
7. Operation in a vacuum condition
This product cannot be used for vacuum. If installed in a
vacuum piping, it will cause vacuum leakage.
8. Ventilation
Provide ventilation when using a valve in a confined area,
such as in a closed control panel.
9. Do not disassemble the product or make any
modifications, including additional machining.
It may cause human injury and/or an accident.
1. Operation in a low temperature condition
It is possible to operate a valve in an extreme temperature, as
low as -10
o
C
.
Take appropriate measures to avoid freezing of
drainage, moisture etc. in low temperature.
2. Mounting orientation
Mounting orientation is free.
3. Initial lubrication of main valve
Grease has been applied to the main valve as initial lubricant.
Mounting
1. Operation in a low temperature condition
Install the products and operate them only after reading the
operation manual carefully and understanding its contents.
Also, keep the manual where it can be referred to as
necessary.
2. Ensure sufficient space for maintenance activities.
When installing the products, allow access for maintenance
and inspection.
3. Tighten threads with the proper tightening torque.
When installing the products, follow the listed torque
specifications.
4. If air leakage increases or equipment does not
operate properly, stop operation.
Initial function and leakage tests should be performed after
installation.
5. Painting and coating
Warnings or specifications printed or affixed to the product
should not be erased, removed or covered up.
VTA301 Series
3 Port Air Operated Valve / Precautions 1
Be sure to read before handling.
- 4 -
VT301
**
-OMH0007-B