Installation
19
Fig. 11: Installing a flushing device
Installing a protective
strainer
If there is a risk that solid particles will be carried along in the evacuation process then a
protective strainer should be installed in the intake connection piece to protect the Roots
pump (see accessories).
Attaching gear cham-
ber extraction
When the vacuum chamber is evacuated quickly (<1 min), each of the gear chambers
should be pumped out via an oil separator in the connection line to the fore-vacuum side.
Do this as follows:
Unscrew both lubricant filler screws (G 3/4") and the blanking plug from the pressure-
side measurement connection (G 3/8"); check the O-rings.
Instead of the filler screws, screw in screw couplings with e.g. small screw-in flanges
(DN 10 KF); use O-rings.
Flange on both oil separators and install the lines.
Fig. 12: Gear chamber extraction
M
