Instruction Manual
D100399X012
EW Valve
July 2017
6
4. Use accepted piping and welding practices when installing the valve in the line. For flanged valve bodies, 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. Shrink‐fit pieces and threaded connections may also loosen. In
general, if post weld heat treating is to be performed, remove all trim parts. Contact your Emerson sales office
or Local
Business Partner for additional information.
5. With a leak‐off bonnet construction, remove the pipe plugs (keys 14 and 16, figure 21) from the bonnet 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.
6. 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, the packing
might require some readjustment to meet specific service conditions. Check with your process or safety engineer for any
additional measures that must be taken to protect against process media.
Valves with ENVIRO‐SEAL live‐loaded packing or HIGH‐SEAL live‐loaded packing will not require this initial
re‐adjustment. See Fisher instruction manuals, ENVIRO‐SEAL Packing System for Sliding‐Stem Valves, D101642X012
,
or HIGH‐SEAL Live‐Loaded Packing System, D101453X012
, (as appropriate), for packing instructions. If you wish to
convert your present packing arrangement to ENVIRO‐SEAL packing, refer to the retrofit kits listed in the parts kit
sub‐section near the end of this manual.
Inverted Globe Valve Applications (Actuator below valve)
Due to space restrictions in your application, you may be required to mount the valve/actuator assembly in an inverted
orientation, with the actuator positioned below the valve. If so, the following procedures will help you with
disassembly and assembly techniques.
WARNING
Avoid personal injury or property damage caused by components dropping.
With the valve/actuator upside down, components may drop during disassembly or assembly. Be careful not to position
yourself below the valve in the path of falling parts.
As the bonnet/plug/cage is lowered from the valve body, the center of gravity will be above the lifting points. Take care to
prevent the assembly from tipping over as it is lowered. Either leave the actuator attached to the plug and bonnet, attach
straps to the stem, or provide other means to prevent tipping.
Disassembly
1. Provide adequate support to the actuator while removing it from the bonnet.
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