LEYBOLD RUVAC WH 2500, Инструкция по установке и эксплуатации

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Description
25
130001398_002_C0 - 09/2016 - © Leybold
Max. allowable differential pressure in duty cycle:
RUVAC WH 4400 at 50 Hz / SP 630
Operation: 10 minutes at high differential pressure
10 minutes at a discharge pressure of less then 1 mbar
Pump ratio* =
Nominal pumping speed SP 630
Nominal pumping speed RUVAC 4400
630 m
3
· h
-1
= ———————— = 1:7
4400 m
3
· h
-1
Duty cycle is 50 %. The maximum allowable differential pressure resulting
from the table above is Dpmax = 63 mbar.
See also Section 4.1 for calculating the cut-in pressure.
In the case of short cycle operation we recommend the use of a gear cham-
ber evacuation facility so as to avoid oil spreading, see Section 1.5. The
RUVAC WHU 2500 with PFPE is equipped with an integrated gear chamber
evacuation facility.
If the pump is intended for more than 100,000 cycles, always use the gear
chamber evacuation.
* Pump ratio is given by the nominal pumping speed of the backing pump
relative to the nominal pumping speed of the Roots booster.
Example
Avoid oil spreading