Instruction manual

1 INTRODUCTION
1.1 Scope and definitions
This manual provides installation, operation and maintenance instructions for the BOC
Edwards DP180 Dry Vacuum Pump (abbreviated to DP180 in the remainder of this manual).
You must use the DP180 as specified in this manual.
Read this manual before you install and operate your DP180. Important safety information is
highlighted as WARNING and CAUTION instructions; you must obey these instructions. The
use of WARNINGS and CAUTIONS is defined below.
WARNING
Warnings are given where failure to observe the instruction could result in injury or death
to people.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the
equipment, associated equipment or process.
The units used throughout this manual conform to the SI international system of units of
measurement.
1.2 The DP180 pump
The DP180 dry pump operates at pressures between atmospheric and ultimate vacuum without
any lubricating or sealing fluid in the pumping chamber. This ensures a clean pumping system
without back-migration of oil into the system being evacuated. The pump is mounted on steel
runners.
The DP180 is a three-stage, positive-displacement rotary pump in which pairs of intermeshing
rotors (of different profiles mounted on common shafts) are held in correct phase relation by a
pair of timing-gears. The timing-gears and the adjacent double-row angular contact
ball-bearings are oil lubricated.
The pump casing material is cast-iron, the shafts and rotors are made from SG iron. The internal
and external shaft-seals on the pump shafts and the motor drive-shaft are made from
polytetrafluoroethylene (PTFE).
Bearings are located on the high vacuum end of the shaft, near to the pump-inlet. These bearings
are packed with perfluoropolyether (PFPE) grease. As supplied, the bearing end-cover is
connected internally to the pump-inlet and is evacuated when the DP180 pump is operating. If
required, you can use your own external evacuation pump to evacuate the bearing end-cover.
DP180 Dry Vacuum Pump 1