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
Page
10
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5
Versum Materials Confidential
Preventative Maintenance – Mechanical Components
NOTE: Asterisk (*) indicates that Preventative Maintenance task requires a shutdown.
Component
Task
Minimum Frequency
Process Piping &
Components
Purge with clean, dry, inert gas to achieve Versum
Materials, Inc. recommended purity levels. Refer to
Gasguard™ Position Paper on Gas Panel Purging
3EQ95018. Minimum recommended purity level for purge
gas is
99.999% and
<1ppmv H20 to maintain mechanical integrity. A higher level
of purge gas purity may be required to meet customer process
specifications.
Corrosives: maintenance
activity and at the start of an
extended shutdown. It is
recommended that panels in
corrosive service (including
standby side) be purged at
least once every 3 months.
All other process gases:
Every maintenance
activity
Process/Purge Panel
Visually inspect for damage, leaks, or malfunctioning
components. Check process and purge pressures for
readings that are outside of the specification range (found in
Section 11 of operating manual) or dramatic changes from
previous values. Observe the interior of the gas cabinet for
any signs of corrosion or gas leakage. Verify that pneumatic
tubing is securely connected to valve actuators.
Every maintenance activity
or Every 3 months
(whichever comes first)
Cabinets and Frames
Sweep enclosures and racks. Clean all external surfaces with
a clean damp cloth. Clean the interior cabinet enclosures and
rack frames.
Caution:
Use a damp cloth only on the outside
of the controller. Do not clean controller interior. Especially in
hazardous areas, DO NOT rub the surface of the screen with
a dry cloth. This could generate an electrostatic charge. When
cleaning the controller face, take measures to prevent an
electrostatic discharge such as earth band, ionic shower, etc.
Caution:
Do not use pressurized water to clean inside or
outside of source systems as serious damage could occur to
the electronic components.
Every 3 months unless
the equipment is located
in a cleanroom
environment. Cleanroom
units should be cleaned
as necessary.
Cabinet Door/Window
Verify that self-closing mechanism functions properly. Inspect
hinges and gaskets for damage or excessive wear. Look for
aging, cracks, and peeling of the gaskets. Also check the
surface onto which the gaskets seal. Look for oxidation,
corrosion, and foreign material that would prevent proper
sealing.
Yearly
Pressure Monitors
(Transducer, Switch,
Transmitter, Gauge)
Check pressure readings against checklist readings. If
process gas pressure must be adjusted, monitor the delivery
pressure for a smooth increase or decrease.
Weekly
Verify zero.
Yearly
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