Brooks Instrument 1255A, Installation & Operation Manual

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Section 2 Installation
6
Upon removal from storage, a visual inspection should be conducted to
verify the condition of equipment is “as received”. If the equipment has
been in storage for an excess of two (2) years or in conditions in excess of
those recommended, all pressure boundary seals should be replaced and
the device subject to a hydrostatic/pneumatic pressure test to 150% of
rated pressure.
Installation
The flowmeter should be mounted within 6° of true vertical. The inlet
connection to the flowmeter is in the bottom end fitting. The connections
are normally horizontal, female NPT. Be sure the piping is adequately
supported to prevent undue strain on the meter.