Operating Environment; Maintenance - SMC Networks SYJ Series Operation Manual

SYJ Series
Precautions for 3/5 Port Solenoid Valve ④ ④ ④ ④
Be sure to read before handling. Refer to main text for detailed precautions on every series.
4.
If excessive carbon powder is seen, install a
mist separator on the upstream side of the
valve.
If excessive carbon dust is generated by the compressor,
it may adhere to the inside of a valve and cause it to
malfunction.
For compressed air quality, refer to SMC's Best
Pneumatics catalog.

Operating Environment

Warning
1. Do not use in an atmosphere having corrosive gases,
chemicals, sea water, water, water steam, or where
there is direct contact with any of these .
2. Products with IP65 enclosures (based on IEC60529)
are protected against dust and water, however, these
products cannot be used in water.
3. Products compliant to IP65 satisfy the specifications
through mounting. Be sure to read the Precautions for
each product.
4. Do not use in an environment where flammable gas or
explosive gas exists. Usage may cause a fire or
explosion. The products do not have an explosion
proof construction.
5. Do not use in a place subject to heavy vibration and/or
shock.
6. The valve should not be exposed to prolonged sunlight.
Use a protective cover.
7. Remove any sources of excessive heat.
8. If it used in an environment where there is possible
contact with oil, weld spatter, etc., exercise preventive
measures.
9. When the solenoid valve is mounted in a control panel
or its energized for a long time, make sure ambient
temperatures is within the specification of the valve.

Maintenance

Warning
1. Perform maintenance inspection according
to the procedures indicated in the operation
manual.
If handled improperly, malfunction and damage of
machinery or equipment may occur.
2. Removal of equipment, and supply/exhaust
of compressed air
When components are removed, first confirm that
measures are in place to prevent workpieces from
dropping, run-away equipment, etc. Then, cut off the
supply pressure and electric power, and exhaust all
compressed air from the system using the residual
pressure release function.
For 3-position closed center type, exhaust the
residual pressure between the valve and the cylinder.
When the equipment is operated after remounting or
replacement, first confirm that measures are in place
to prevent lurching of actuators, etc. Then, confirm
that the equipment is operating normally.
3. Low frequency operation
Valves should be operated at least once every 30
days to prevent malfunction. (Use caution regarding
the air supply.)
4. Manual override operation
When the manual override is operated, connected
equipment will be actuated.
Operate after safety is confirmed.
Caution
1. Drain flushing
Remove drainage from the air filters regularly.
2. Lubrication
In the case of rubber seals, once lubrication has been
started, it must be continued.
Use class 1 turbine oil (with no additive), VG32
because if other lubricant oil is used, it may cause
malfunction. Please contact SMC for suggested class 2
turbine oil class 2 (with additive), VG32.
How to Find the Flow Rate (at air temperature of 20 ℃ ℃ ℃ ℃ )
Subsonic flow when (P2+0.100)/ (P1+0.100)>0.5
√
Q=240S △P(P1+0.100)
Sonic flow when (P2+0.100)/ (P1+0.100)≦0.5
Q=120S (P1+0.100)
Q: Air flow rate〔dm
S: Effective sectional area (mm
△ P: Differential pressure P1- P2〔MPa〕
P1: Upstream pressure〔MPa〕
P2: Downstream pressure〔MPa〕
※ Correction for different air temperatures
Multiply the flow rate calculated with the about
formula by a coefficient from the table below.
Air temperature(℃)
Correction coefficient
- 7 -
3
/min(ANR)〕
2
)
-20 -10 0 10 30
1.08 1.06 1.04 1.02 0.98 0.97 0.95 0.94
No.SYJ3000-OMM0002-A
40 50 60