LEYBOLD RUVAC WH 2500, Инструкция по установке и эксплуатации

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Description
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130001398_002_C0 - 09/2016 - © Leybold
1 Description
1.1 Design and Function
The RUVAC WH and RUVAC WHU are Roots boosters driven by water
cooled hermetically sealed motors.
The WHU types have a pressure balance line between the discharge and
intake flanges.
The RUVAC WH and WHU are lubricated with synthetic oil or perfluorized
polyether (PFPE).
Only specially prepared RUVAC WH/WHU PFPE pumps can be used for
pumping oxygen greater than atmospheric concentration.
Only RUVAC WH/WHU PFPE pumps can be used for pumping very aggres-
sive or hazardous gasses. In these cases it is imperative that you consult
your local Leybold office.
The RUVAC WH/WHU 2500 can pump gas in the vertical direction, the
RUVAC WH/WHU 4400 und 7000 in the vertical or horizontal direction.
Although the pumping chamber of Roots pumps is in principle free of sealing
agents and lubricants, the two gearwheels of the synchromesh gearing and
the bearings are lubricated with synthetic oil or with PFPE. The two bearing
chambers are separated from the pumping chamber by the impeller seals.
The RUVACs are driven by a water cooled hermetically sealed motor. The
hermetically sealed motor runs completely under vacuum and is sealed
against atmosphere. Thus a shaft feedthrough to the atmosphere is not
needed.
Fig. 1.1 Schematic cross-section of a Roots pump (vertical flow)
1
2
3
4
5
1 Intake flange
2 Pumping chamber
3 Casing
4 Impeller
5 Discharge flange