
MNL000449.doc
Revision 22
02/15/2019
Gasguard Distribution
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
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Versum Materials Confidential
the system. Purge out all process gas lines
and seal them. Tag out and lock out the
manual process inlet valve to the
distribution system (see Section 1.10 ) or
branch inlet valve to prevent opening while
service is being performed. Tag out and
lockout process valves at the tool gas panel
to prevent backflow of another hazardous
gas to the distribution system. Once the
maintenance is complete, helium leak test
the system using a mass spectrometer.
Follow the start-up procedure, in Section
8.3.
Personal injury or death may
result if proper personal
protective equipment (PPE) is not
worn when performing
troubleshooting. See Section 1.8
of this manual for the proper
PPE.
When piping is added, proper labels
must be affixed to critical
components. Failure to label
correctly could result in inadvertent
operation of system, possible
resulting in personal injury or
death.