Instructions Manual
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Multiple Roots Type Dry Pump GR60/90/180
YK09-0023-DI-003-02
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3.3 Intake port pipe
Thoroughly clean the inside of the vacuum chamber, piping, vacuum valves, etc. and then
connect to the pump. If it is connected under a dirty condition, the ultimate pressure becomes
higher or the time required for the pressure to decrease down to a given pressure becomes
longer. Wear gloves and do not touch any vacuum parts with your bare hands.
In addition, connect the pump's intake port and the pipe with VF50 (GR60) or VF80 (GR90 and
GR180). To prevent the vibration on the pump from propagating to the vacuum chamber, we
recommend connecting a bellows pipe.
(1) If the pump suctions solid substances or moisture, such as dust and
fine powder, not only the ultimate pressure may deteriorate but also
it is broken down.
(2) The metal net at the intake port is attached to prevent large foreign
objects, such as bolts, from entering the pump unit. Do not remove
it unless inspection etc. is necessary. In the event that a foreign
object (such as a bolt) falls in the intake port of the pump or a
foreign object (such as powder or solid substances smaller than the
metal net) is sucked, the pump needs to be disassembled to remove
them. Contact your local service station. If the pump continues to
operate without any change, it may stop.
(3) Take care not to damage the seat surface of the gasket. After
assembling the piping, conduct a leak test for the entire system.
CAUTION
