4
Fig.3.1 Change region of the
voltage and frequency
3) Switch power ON, check the direction of rotation, and check for suction.
4) When checks are complete, switch off the main power supply and stop the pump. Check
that the pump has stopped.
3.5 Fluctuations in the power voltage and frequency
Standard: Rotating electric machine general rules IEC
60034-1:2004.
There is no problem to main parts when operated continuously
under the voltage and frequency fluctuations in area A, and no
problem to main parts when operated under the voltage and
frequency fluctuations in area B.
Here, “no problem” means that the pump can be operated
safely
and without the life of the parts being shortened, and does not
refer to the pump characteristics or the rated conditions such
as a rise in temperature.
The ratings are the rated torque (N.m).
3.6 Piping
1) Ensure that all piping is installed without leaks, and fit a filter
on the pump inlet.
2) Use inlet piping with an internal diameter of 12 mm or more.
3) Ensure that piping connected to the outlet does not cause back pressure. Maximum back
pressure is 0.03 MPa (gauge pressure).
4)
In case of selecting the inlet pipe and exhaust pipe that are not from our products, please
select the exhaust pipe that has same or larger inner diameter length with the inlet pipe.
5) When evacuating a vessel, ensure that a shut-off valve is placed between the pump inlet
pipe and the vessel (see Fig. 3.2).
Fig. 3.2 Example of Piping Used When Evacuating a Vessel
6) When starting the pump, it may not start if the intake-side pressure is lower than the
atmospheric pressure.
Attach an atmospheric release leak valve between the pump intake pipe and vessel, and set
the intake-side pressure to atmospheric pressure when starting the pump.
After starting the pump, always close the leak valve.
3.7 Storage
Switch off the main power supply and check that the pump has stopped.
Remove the power cord connected to the pump, place the rubber cap on the inlet pipe,
remove the silencer from the outlet and fit the vent plug, and store in a location with low
humidity
Vacuum pump
Filter
Leak valve
Shut-off valve
Vessel
