Instructions Manual
－
Multiple Roots Type Dry Pump GR60/90/180
YK09-0023-DI-003-02
5
Oil is used on gears and bearings for lubrication but enclosed liquid, such as oil, is not used in the
rotor/casing. The special sealing structure keeps oil from entering in the rotor/casing, providing clean
exhaust.
This can be used for repeated exhaust at between the atmospheric pressure and a vacuum pressure
or for high-load application, such as high-pressure continuous operation. In addition, it is most
suitable for load lock operation (loading/unloading) which requires a high throughput. This supports
general induction motors and therefore various types of motors can be installed to your purpose of
use.
2.2 System Flow
Cooling water, nitrogen gas, and power supply are necessary as utilities.
The cooling water enters from the cooling water inlet of the panel, circulates in the pump body, and
then discharges from the cooling water outlet.
Nitrogen gas is used as shaft seal gas that reduces the flow of oil in the lubrication chamber into the
casing.
The power supply is a 200V- or 400V-class three-phase power supply. Check the motor
specifications.
Be sure to attach overload protective equipment.
If not, it may result in a motor burnout or fire.
Using a flow sensor etc, make a system that shuts out the supply of
electricity to the pump in the event that the cooling water stops. If the
operation is continued under the conditions where the cooling water
flow is lower than the specified value, the pump may be broken.
CAUTION
(Customer's responsibility)
3-phase power supply
Overload protective
equipment
Earth leakage breaker
etc.
Exhaust port: NW40
Exhaust pressure limit: 0.02
MPaG
(Atmospheric pressure of 0.00
MPaG recommended)
Nitrogen gas port: Rc 1/4
Supply pressure: 0.1 to 0.5 MPaG
Adjusting pressure: 0.05 to 0.10 MPaG
(during the operation)
Pressure meter value adjusted by
regulator
Gas flow: 5 SLM (constant)
Cooling water port: Rc 3/8
Supply water pressure: 0.1 to 0.3
MPaG
Pressure difference between outlet
and inlet: 0.1 MPaG or more
Cooling water temperature: 10 to
30
ﾟ
C
Cooling water flow: 5.0 L/min
Intake port:
GR60 VG50
GR90 VG80
GR180 VG80
Nitrogen gas pipe
Cooling water pipe
(Customer's responsibility)
WARNING
