INSTALLATION, OPERATION, &
MAINTENANCE MANUAL
TITLE: F88 Series Safety Relief Valve Rev. D Page 5 of 15
* Confirm service / application with factory.
2.3 INSTALLATION
Prior to installation, check that the set pressure on the nameplate is as required, and meets the system
requirements.
The F88 Series safety relief valve should be installed in the upright position per the figure on the next
page, as close as possible to the pressure source, to minimize pressure losses between the system and
the valve. This should be in accordance with accepted piping practices, as set forth in the API 520 Part II,
which recommends that inlet piping pressure losses should not exceed 3% of the set pressure when the
valve is flowing.
The valve discharge pipe should be sufficiently large so that backpressure does not exceed system
design conditions when relieving. High backpressure may diminish capacity below the value assumed
during the valve’s sizing and selection process.
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