Emerson Yarway 9200 Series Installations- und Wartungsanweisungen - Seite 2
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YarwaY 9200 SerieS ArC
InstallatIon and maIntenance InstructIons
Figure 1
3 diameters straight pipe
minimum recommended
at valve outlet
To process
Main flow
check valve
5 diameters straight pipe minimum
From pump
INstallatION (rEfEr tO fIGurE 1)
The 9200 Series valve is sized and configured
based on specifications provided by the user.
Make certain that these conditions are still
applicable. Changes in pressure, temperature,
normal main flow and minimum flow
requirements could result in unsatisfactory
performance. if operating conditions have
changed, contact Yarway; modifications
may be required prior to installation.
remove all packing material. Place the valve
on wooden blocks with the flow arrow pointed
down. Push the disc from its seat and flush
away any packing materials with compressed
air or high pressure water. The disc should
move freely (against the spring load) through
the entire stroke length until contacting the
upper stop. This may not be practical on
larger sizes.
The valve may be installed with the main flow
direction either horizontal or vertically up.
The direction of bypass flow may be selected
to suit the installation.
VAlVeS 2", 3" And 4"
®
Optional
Bypass flow
recommended at valve inlet
OpEratIONal ChECk
When the valve is properly installed the
combined main and bypass flows should equal
or exceed that of the specified minimum pump
flow. if operational checks indicate a deviation
from the original specifications and field
adjustments are necessary, contact Yarway
for additional information.
ValVE MaINtENaNCE
except for periodic operational checks the
valve requires little maintenance. The disc
assembly, spring, bypass bushing and flow
conditioner should be inspected coincident
with other annual inspections. Make certain
that all pressure is relieved and the pipeline
is secured against pressurization before
attempting disassembly for inspection
purposes.
BPr
if required
receiver vessel
Shut off valve
long radius pipe
bends typical
2