M588-08-880 Issue D
Page 2 © Edwards Limited 2017. All rights reserved.
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Introduction
The gas module supplied with the pump is not intended to perform a safety function. Users may need to
consider adding appropriate measures to monitor the flow of purge gas, for example external sensors.
Systems that are fitted with the light duty gas module must not be used on applications pumping flammable
or pyrophoric materials.
For further information please refer to Publication Number P400-40-100, Applications Note 'Pumping Flammable
Gases' P411-00-090 or contact Edwards.
1.3 Safety and maintenance frequency
Ensure that the maintenance technician is familiar with the safety procedures which relate to the products
pumped.
Allow the pumps to cool to a safe temperature before you fit lifting eye bolts or start maintenance work.
Vent and purge the dry pumping system before you start any maintenance work.
Isolate the dry pumping system and other components in the process system from the electrical supply so
that they cannot be operated accidentally. Note that the emergency stop switch on the dry pumping system
is not an electrical isolator.
Wait for at least four minutes after you have switched off the electrical supply before you touch any
electrical component on the dry pumping system.
Route and secure cables, hoses and pipelines during maintenance to avoid possible risk of trips or
entrapment.
Obey the safety instructions given below and take the appropriate precautions. If you do not, you
can cause injury to people and damage to equipment.
Electrical, purge gas and water supplies are all potentially hazardous energy sources. Before
carrying out any maintenance the supply of these sources should be locked and tagged out.
Personal protective equipment should be checked and used as specified by its supplier. Hazardous
chemicals that have been pumped are located within the pumps and piping. Use of suitable
protective gloves and clothing along with a respirator is recommended if contact with substances
is anticipated. Particular caution should be exercised when working with fluorinated materials
which may have been exposed to temperatures greater than 260 °C. Refer to Edwards Material
Safety Data Sheets for detailed information.
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