Flowserve 1878 Y-Pattern Globe Valves - Manual (Page 5)

4.0
TEST CONDITIONS
4.1 Each valve covered by this manual has received the following hydrostatic
tests:
4.1.1
Shell hydrostatic test at 1.5 times the 100
°F pressure rating.
4.1.2
A disc closure test at 110% of the 100
°F pressure rating.
4.1.3 A seat leakage test at 110% of the valves specified maximum "delta
P".
4.1.4
A backseat leakage test at 110% of the 100
°F pressure rating.
4.1.5 A packing test at 110% of the 100
°F pressure rating.
5.0
OPERATING PRECAUTIONS AND LIMITATIONS
5.1 Maximum hydrostatic test pressure shall not exceed the values imposed by
the ASME Code.
6.0
INSTALLATION INSTRUCTIONS
6.1
LIFTING AND HANDLING REQUIREMENTS AND LIMITATIONS
6.1.1 Good judgment should be exercised in selecting a lifting device that
will safely support the unit's weight.
6.2
INSTALLATION
6.2.1 Although the valves have been shipped in a clean condition, prior to
installing the valves, examine the lines and the valve ports for foreign
matter and clean them thoroughly if they have been exposed to the
elements. (BEFORE CLEANING IN THIS FASHION, CHECK AT
THE SITE TO SEE IF A SPECIFIC CLEANING PROCEDURE
SHOULD BE FOLLOWED.) Open the valves fully and flush them out
with water if possible; otherwise blow them out with air or steam.
In performing this cleaning procedure, the ports should be vertical,
the stem horizontal to assure complete removal of all matter which
might have accumulated during storage.
6.2.2 Ensure that there is no line sag at the point of installation. Eliminate
any pipeline deviation by the proper use of pipeline hangers or similar
device.
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