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VCC
Specific Product Precautions 1
Be sure to read this before handling the products.
Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid
Valve for Fluid Control Precautions.
Design
Warning
1. Cannot be used as an emergency shutoff valve, etc.
The valves presented in this catalog are not designed for
safety applications such as an emergency shutoff valve. If the
valves are used in this type of system, other reliable safety
assurance measures should also be adopted.
2. Maintenance space
The installation should allow sufficient space for maintenance
activities.
3. When an impact, such as water hammer, etc.,
caused by the rapid pressure fluctuation is applied,
the solenoid valve may be damaged. Use care when
handling.
Selection
Warning
1. Confirm the specifications.
Give careful consideration to the operating conditions such as
the application, fluid and environment, and use within the op-
erating ranges specified in this catalog. Also, be sure to carry
out an evaluation using an actual product to ensure that prob-
lems do not occur under the working conditions.
2. Fluid
1) Applicable fluid on the list may not be used depending
on the operating condition.
Give adequate confirmation, and then determine a model,
just because the compatibility list shows the general case.
3. Air quality
1) Use clean air.
Do not use compressed air which includes chemicals, syn-
thetic oils containing organic solvents, salt or corrosive
gases, etc., as it can cause damage or malfunction.
2) Install air filters.
Install air filters close to valves at their upstream side. A fil-
tration degree of 5 µm or less should be selected.
3) Install an air dryer or after-cooler, etc.
Compressed air that includes excessive drainage may
cause malfunction of valves and other pneumatic equip-
ment. To prevent this, install an air dryer or after-cooler,
etc.
4) If excessive carbon powder is generated, eliminate it by
installing mist separators at the upstream side of
valves.
If excessive carbon powder is generated by the compres-
sor, it may adhere to the inside of the valves and cause a
malfunction.
Refer to Best Pneumatics No.5 for further details on com-
pressed air quality.
4. Ambient environment
Use within the operable ambient temperature range. Confirm
the compatibility between the product's composition materials
and the ambient atmosphere. Be sure that the fluid used does
not touch the external surface of the product.
5. Countermeasures against static electricity
Take measures to prevent static electricity since some fluids
can cause static electricity.
Series
Caution
1. 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.
Install piping so that it does not apply pulling, pressing, bend-
ing or other forces on the valve body.
2. Winding of sealant tape
When connecting pipes, fittings, etc., be sure that chips from
the pipe threads and sealing material do not enter the valve.
Furthermore, when sealant tape is used, leave 1.5 to 2 thread
ridges exposed at the end of the threads.
3. Avoid connecting ground lines to piping, as this
may cause electric corrosion of the system.
4. Always tighten threads with the proper tightening
torque.
When attaching fittings to valves, tighten with the proper tight-
ening torque shown below.
Tightening Torque for Piping
Connection threads
Rc 1/8
Rc 1/4
G 1/4
5. Connection of piping to products
When connecting piping to a product, refer to its instruction
manual to avoid mistakes regarding the supply port, etc.
Operating Environment
Warning
1. Do not use the valves in an atmosphere having cor-
rosive gases, chemicals, salt water, water, steam, or
where there is direct contact with any of these.
2. Do not use in locations subject to vibration or im-
pact.
3. Do not use in locations where radiated heat will be
received from nearby heat sources.
4. Employ suitable protective measures in locations
where there is contact with water droplets, oil or
welding spatter, etc.
4
Piping
Winding
direction
Sealant tape
Proper tightening torque N·m
7 to 9
12 to 14
9 to 11
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