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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6
Versum Materials Confidential
Preventative Maintenance – Mechanical Components (continued)
NOTE: Asterisk (*) indicates that Preventative Maintenance task requires a shutdown.
Component
Task
Minimum Frequency
Pressure Monitors
(Transducer, Switch,
Transmitter, Gauge)
*Function Test Pressure Switches for safety critical alarms.
Where applicable, verify:
•
High pressure inlet shutdown
•
High pressure delivery shutdown
•
Co-axial high/low pressure shutdown
•
Low pressure excess flow alarm
Every 2 years
Regulator
Check downstream pressure.
Daily
Toxics, Corrosives and Pyrophorics only: Visually examine
exterior of the regulator and connections for signs of external
leakage.
Annually
Regulator Bonnet Vent
Piping
Pyrophorics only: Visually examine exterior of bonnet piping
for signs of blockage, silane dusting, leakage, etc. Verify vent
is routed to safe location. Caution: Do not attempt to clean
blockage until verifying that there is no gas present.
Yearl
y
Excess Flow Switch
* Test Excess Flow Switch.
Every 2 years
Vacuum Venturi
Verify vacuum readings.
Every maintenance activity
Exhaust Ventilation Inlet
Filter
Check for clogging.
Monthly
Replace or clean as required.
As necessary
Analog Exhaust Monitor
(i.e., Setra)
Verify zero.
Yearly
Exhaust Switch
Replace as recommended.
See Section 10.3
Exhaust Switch Pitot
Tube
Visually inspect for damage.
Yearly
Pneumatic Bulkhead and
fittings
Visually inspect for fatigue, cracking, or other damage.
Yearly
Pneumatic Tubing
Examine for cracking or signs of wear. Replace as required or
recommended.
Indoor: Yearly
Outdoor: Every 6 months
UV/IR Detector
Clean housing glass. Verify that the detector is aimed in the
proper direction.
Indoor: Every 6 months
Outdoor: Monthly
* Test UV/IR detector.
Yearly
UV Source for auto self-
check
Replace as recommended.
See Section 10.3
Temperature Switch
* Test temperature switch.
Every 2 years
VCR Gaskets
Replace each time a connection is broken. Do not reuse.
As required