EU and EW Series Valves
Instruction Manual
August 2010
5
combinations are limited in their
pressure drop and temperature range
capabilities, do not apply any other
conditions to the valve without first
contacting your Emerson Process
Management sales office.
WARNING
If you are hoisting the valve, use nylon
slings to protect the surfaces.
Carefully position the slings to prevent
damage to the actuator tubing and any
accessories. Also, take care to prevent
people from being injured in case the
hoist or rigging slips unexpectedly.
Refer to table 6 for valve assembly
weights. It is important to use
adequately sized hoists and chains or
slings to handle the valve.
1. Before installing the valve, inspect the valve and
associated equipment for any damage and any
foreign material.
2. Make certain that the valve body interior is clean,
that pipelines are free of foreign material, and the
valve is oriented so that pipeline flow is in the same
direction as the arrow on the side of the valve.
CAUTION
For long service life and more effective
operation, the process liquid must be
clean. If the valve being installed has a
Whisper Trim, WhisperFlo, or Cavitrol
Trim cage with small internal flow
passages, impurities or entrained
solids in the process liquid may cause
irreparable erosion damage to the
seating surfaces and may plug cage
holes and passages, causing
cavitation damage. During valve
installation or the plant cleaning cycle,
install a strainer upstream from the
valve to help free pipelines of foreign
material.
3. The control valve assembly may be installed in
any orientation unless limited by seismic criteria.
However, the normal method is with the actuator
vertical above the valve. Other positions may result
in uneven valve plug and cage wear and in improper
operation. Support the actuator if it is not installed in
the vertical position. For more information, consult
your Emerson Process Management sales office.
4. Use accepted piping and welding practices when
installing the valve in the line. You can leave internal
elastomeric parts in place when welding. For flanged
valves, use a suitable gasket between the valve and
pipeline flanges.
CAUTION
Depending on valve body materials
used, post weld heat treating might be
required. If so, damage to internal
elastomeric and plastic parts, as well
as internal metal parts is possible.
Shrunk-fit pieces and threaded
connections might also loosen. If post
weld heat treating is to be performed,
all trim parts should be removed.
Contact your Emerson Process
Management sales office for additional
information.
5. With a leak-off bonnet construction, remove
the 1/4 NPT pipe plugs (key 14, figure 5) from the
bonnet to hook up the leak-off piping.
6. If continuous operation of the plant is required
during inspection or maintenance of the valve, install
a three-valve bypass around the control valve
assembly.
7. If the actuator and valve are shipped separately,
refer to the actuator mounting procedure in the
appropriate actuator instruction manual.
WARNING
Personal injury could result from
packing leakage. Valve packing was
tightened before shipment; however
some readjustment will be required to
meet specific service conditions.
If the valve has ENVIRO-SEAL
t
live-loaded packing
or HIGH-SEAL ULF live-loaded packing installed,
this initial re-adjustment will probably not be
required. See the Fisher instruction manuals titled
ENVIRO-SEAL Packing System for Sliding-Stem
Valves (D101642X012) or
HIGH-SEAL ULF
Live-Loaded Packing System (D101453X012) (as
appropriate) for packing instructions.
