Connecting the vacuum side
1. Remove the protective cap from the vacuum connection.
2. Remove any scaling, loose fragments or similar from welded lines prior to installation.
3. Connect the vacuum pump to the vacuum chambers.
4. Install a shut-off unit in the vacuum line in order to block the influx of process gases.
5. Support or suspend the piping to the vacuum pump so that no piping system forces act on the
vacuum pump.
5.3 Connecting the exhaust side
CAUTION
Danger of injury from bursting as a result of high pressure in the exhaust line
Faulty or inadequate exhaust pipes lead to dangerous situations, e.g., increased exhaust pressure.
There is a danger of bursting. Injuries caused by flying fragments, the escaping of high pressure, and
damage to the unit cannot be excluded.
► Open shut-off units immediately before or at the same time as starting the pump.
► Take care that atmospheric pressure is always present on the exhaust side. Overpressure or un-
derpressure are not permissible.
► Check the function of the exhaust line on a regular basis.
Connecting the exhaust side
● Do not close or throttle the exhaust line. The discharged gas must be permitted to
stream out unhindered.
● Choose a minimum diameter equal to the nominal diameter of the exhaust connection.
● Do not use the exhaust line as a source of compressed air.
● Support or suspend the piping to the vacuum pump so that no piping system forces act
on the vacuum pump.
● On vacuum pumps with silencer, fit the exhaust connection horizontally.
Condensate separator
Pfeiffer Vacuum recommends installing a condensate separator, with condensate drain at
the lowest point of the exhaust line.
Installation and operation of accessories
Pfeiffer Vacuum offers a wide range of specially tailored accessories for your screw pumps.
● Information and ordering options for approved
● Described accessories are not included in the shipment.
Procedure
1. Remove the protective cap from the exhaust connection.
2. Connect the exhaust line with the exhaust connection.
3. Route the piping downwards from the vacuum pump, to prevent condensate return.
5.4 Connecting the cooling water supply
Prerequisites
● Cooling water connection unpressurised
● Cooling system evacuated
Installation
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