Instruction Manual

Instruction Manual
D100400X012
EWN and EW-1 Valves
July 2014
4
2. 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. With some valves, the actuator may also need to be supported when it is not
vertical. For more information, consult your Emerson Process Management sales office.
Figure 2. Lubricator and Lubricator/Isolating Valve (Key 14)
10A9421-A
AJ5428-D
A0832-1
LUBRICATOR
LUBRICATOR/ISOLATING VALVE
Note
If the valve being installed has a Whisper Trim cage with small internal flow passages, consideration s hould be given to installing
an upstream strainer to prevent the lodging of particles in these passages. This is especially important if the pipeline cannot be
thoroughly cleaned or if the flowing medium is not clean.
3. Use accepted piping and welding practices when installing the valve in the line. Internal elastomeric parts may stay
in place during the welding procedure. For flanged valves, use a suitable gasket between the valve body and
pipeline flanges.
CAUTION
Depending on valve body materials used, post weld heat treating may 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 may also loosen. In
general, 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.
4. With a leak-off bonnet construction, remove the 1/4 NPT pipe plugs (keys 14 and 16, figure 6) to hook up the
leak-off piping. If continuous operation is required during inspection or maintenance, install a three-valve bypass
around the control valve assembly.
5. If the actuator and valve are shipped separately, refer to the appropriate actuator instruction manual for the
actuator mounting procedure.