Selection
Warning
3. Countermeasures against static electricity
Take measures to prevent static electricity since some fluids
can cause static electricity.
4. Low temperature operation
1. The valve can be used in fluid temperatures down to –40
°
C.
However, take measures to prevent freezing or solidification
of impurities, etc.
2. When using valves for water application in cold climates,
take appropriate countermeasures to prevent the water from
freezing in tubing after cutting the water supply from the
pump, by draining the water etc. When warming by a heater
etc., be careful not to expose the coil portion to a heater.
Installation of a dryer, heat retaining of the body is recom-
mended to prevent a freezing condition in which the dew
point temperature is high and the ambient temperature is
low, and the high flow runs.
5. Fluid properties
Use a general compressed air with a filter of 5
µ
m or less
mounted on the inlet of the piping. (Excluding dry air)
Caution
1. Leakage voltage
When the solenoid valve is operated using the controller, etc.,
the leakage voltage should be the product allowable leakage
voltage or less. Particularly when using a resistor in parallel
with a switching element and using a C-R element (surge volt-
age suppressor) to protect the switching element, take note
that leakage current will flow through the resistor, C-R element,
etc., creating a possible danger that the valve may not turn off.
AC coil: 5% or less of rated voltage
DC coil: 2% or less of rated voltage
R
SOL.
OFF
Switching element
C
Leakage current
Leakage voltage
Power supply
Design
Warning
1. Cannot be used as an emergency shutoff valve etc.
The valves presented in this catalog are not designed for safe-
ty 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. Continuous valve open
The valve is for pulse operation. Do not open the valve contin-
uously. Since a large amount of air is consumed, the dia-
phragm will oscillate (chatter) due to insufficient air supply on
the inlet side, and this can lead to failure.
Silencer
Caution
1.
The silencer’s response properties do not change in the initial
stage, but will change due to the blockage after long use.
Replace it after using about 500,000 times. This number is
subject to change based on fluid quality and energizing time.
2.
When using a silencer, make space for silencer replacement.
Selection
Warning
1. Air quality
1. Use clean air.
Do not use compressed air that contains chemicals, synthet-
ic oils including organic solvents, salt or corrosive gases,
etc., as it can cause damage or malfunction.
2. Install an air filter.
Install an air filter close to the valve on the upstream side. A
filtration degree of 5
µ
m or less should be selected.
3. Install an aftercooler or air dryer, etc.
Compressed air that contains excessive drainage may
cause malfunction of valves and other pneumatic equipment.
To prevent this, install an aftercooler or air dryer, etc.
4. If excessive carbon powder is generated, eliminate it by
installing a mist separator on the upstream side of
valves.
If excessive carbon powder is generated by the compressor,
it may adhere to the inside of the valves and cause a mal-
function.
Refer to the Best Pneumatics for further details on compressed
air quality.
2. Ambient environment
Use within the allowable ambient temperature range. Check
the compatibility between the product’s composition materials
and the ambient atmosphere. Be certain that the fluid used
does not touch the external surface of the product.
JSXFA
Series
Specific Product Precautions 1
Be sure to read this before handling the products. Refer to the back cover for safety instruc-
tions. For 2-port solenoid valve for fluid control precautions, refer to the “Handling Precautions
for SMC Products” and the “Operation Manual” on the SMC website: https://www.smcworld.com
11
