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6. STARTUP OPERATION [Oil Mist Remover]
6.2 Oil Mist Remover
■
Initial Setting of Regulator
①
Set a control air pressure to a maximum level.
Example: If a control air pressure varies between
0.54 MPa (78 psi) and 0.64 MPa (73 psi),
maintain it at its maximum 0.65 MPa (74
psi).
②
Pull up the regulator knob, and then the regulator is
unlocked or settable.
③
Turn the regulator knob so that the pressure gauge
reads as follows:
④
Make sure that the vacuum indicator does not show a
red mark.
⑤
Make sure that there is no leak of the control air pipe
joints.
⑥
Press down the regulator knob to lock.
⑦
The oil mist remover makes the gear case internal
pressure negative during operation reducing the oil
pressure by 0.005 to 0.01 MPa (0.7 to 2 psi). This is
not abnormal.
Reset the oil pressure on the relief valve.
⑧
Stop the DSP. Make sure that the solenoid valve is de-
energized to close, the pressure gauge reads 0 (zero),
and accordingly the vacuum indicator shows a red
mark.
1. The oil mist remover can operate when the control air pressure is to 0.39 MPa (57 psi) or more. If the
control air of this pressure is not available (that is, when the DSP is just started or is unloading with
opening the blowoff valve), the ejector can not operate and, as a result, the gear case internal pres-
sure rises. When the gear case internal pressure reaches about 20mmH
2
O, the relief valve opens to
relieve it to the atmosphere for preventing its abnormal rise, and thereby oil mists are inevitably
vented. Avoid, therefore, a long time unloading operation as possible as you can; and, if it is
unavoidable, take a precaution so that the DSP dos not suck the oil mists.
2. If you use two or more DSPs in parallel, the system forces a specific unit to unload for a long time. Its
oil mist remover ejector seldom operates and thereby its relief valve opens frequently with much oil
mists vented. To solve the problem, connect its control air pipe to where is always pressurized there-
by minimizing the period to open the relief valve.
3. The relief valve shortly opens when you start/stop the DSP even if the control air pressure is high.
After the repeated starting/stopping, the relief valve may be slightly oozed with oil. This is not abnor-
mal.
4. The oil mist remover consumes the compressed air of 100 liters per minute or lower or higher.
Exact air consumption depends on the setting of the regulator.
5. Take a precaution if you use the DSP in an AUTO operation mode with the oil mist remover, because
the DSP may not stop automatically due to an uninterrupted consumption of the compressed air by
the oil mist remover.
Standard Setting of Regulator
MPa (psi)
Air Flow Rate
liter/min (cmf)
0.35 (51)
about 100 (35)
NOTE:
The pressure gauge readings may increase/decrease by
0.03 MPa (4 psi) as the control air pressure decreases/
increases respectively by 0.10 MPa (15 psi). Remember that,
due to the regulator’s characteristics, the former rather rises
if the latter drops.
CAUTION