© Edwards Limited 2011. All rights reserved.
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Edwards and the Edwards logo are trademarks of Edwards Limited.
Introduction
A705-40-880 Issue B
1
Introduction
1.1
Scope and definitions
This manual provides installation, operation and maintenance instructions for the Edwards Drystar EDP80, EDP160,
EDP250 and EDP400 Chemical Dry Vacuum Pumps. You must use the EDP pumps as specified in this manual.
Read this manual before you install and operate your pump. Important safety information is highlighted as WARNING
and CAUTION instructions; you must obey these instructions. The use of WARNINGS and CAUTIONS is defined below.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the equipment, associated
equipment and process.
The following IEC warning labels appear on the pump:
The units used throughout this manual conform to the Imperial and US units of measurement.
1.2
The EDP pumps
Note:
The EDP pumps can be used as components in ATEX certified systems. As components, the EDP pumps are
not assigned ATEX qualification.
The EDP pumps are rugged, reliable dry vacuum pumps designed specifically for use in the chemical and
pharmaceutical processing industries. The pump is mounted vertically in a frame (
, item 6); this configuration
ensures that liquids in the process gases easily drain through the pump.
The pump is a three-stage, positive displacement rotary pump in which pairs of intermeshing rotors (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.
A lip-seal arrangement is used to provide a high-integrity seal between the gearbox oil and atmosphere.
WARNING
Warnings are given where failure to observe the instruction could result in injury or death to
people.
Warning - refer to accompanying documentation.
Warning - risk of electric shock.
Warning - hot surfaces.
