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MNL000442.doc
Revision 0
09/19/2016
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
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3.9 Helium Leak Test Port (Optional)
A helium leak test port may be provided on the vent header for connection to a helium
mass spectrometer. Two manual valves are included in the assembly. The Leak Test
Isolation Valve (MV31) isolates the helium leak test port, and the Vent Isolation Valve
(MV22 or MV32) isolates the downstream vacuum venturi/vent system to achieve
vacuums required for inboard leak testing upstream. An access hole is provided for
insertion of the vacuum hose from the leak detector into the enclosure for hookup to
the VCR port. When leak testing is complete, the Leak Test Isolation Valve(MV31)
must be closed and the VCR port capped. The Vent Isolation Valve, (MV22 or
MV32), should be opened and left open during normal operation of the distribution
system.
This port is for vacuum service only. Do not
connect pressurized gas to this port.
3.10
Hazardous Gas Leak Detection System (Customer Requirement)
A gas leak detection system must be installed by the customer for all toxic gases used in
the
distribution system
. The detection points must include the interior of the
distribution
system
and the upstream source cabinet. If a leak is detected, the system must provide a
signal that will shutdown the distribution system and the gas cabinet. See specific I/O
field wiring drawings provided in the document envelope, supplied with this manual.