Maintenance - Emerson Fisher V260 Instruction Manual

V260 Valve
Figure 2. Optional Shaft-to-Body Bonding Strap Assembly
body with the mounting cap screw as shown in
figure 2.
7. Connect pressure lines to the actuator as
indicated in the actuator instruction manual. When
an auxiliary manual actuator is used with a power
actuator, install a bypass valve on the power
actuator (if one is not supplied) for use during
manual operation.
8. If the valve has ENVIRO-SEALt live-loaded
packing installed, an initial re-adjustment may not be
required, depending on your application. See the
Fisher instruction manual titled ENVIRO-SEAL
Packing System for Rotary Valves for packing
instructions and adjustments (see figure 3).

Maintenance

Valve parts are subject to normal wear and must be
inspected and replaced as necessary. The
frequency of inspection and replacement depends
upon the severity of service conditions.
Key numbers are shown in figure 6, unless
otherwise noted.
WARNING
Avoid personal injury or equipment
damage from sudden release of
process pressure or uncontrolled
movement of parts. Before performing
any maintenance operations:
4
Instruction Manual
D Do not remove the actuator from
the valve while the valve is still
pressurized.
D Always wear protective gloves,
clothing, and eyewear when
performing any maintenance
operations to avoid personal injury.
D Disconnect any operating lines
providing air pressure, electric power,
or a control signal to the actuator. Be
sure the actuator cannot suddenly
open or close the valve.
D Vent the power actuator loading
pressure and relieve any actuator
spring precompression.
D Use bypass valves or completely
shut off the process to isolate the
valve from process pressure. Relieve
process pressure from both sides of
the valve. Drain the process media
from both sides of the valve.
D Dual-seal valve constructions can
retain pressure and process fluid even
after process pressure has been
removed from both sides of the valve.
Relieve this pressure before
disassembling or removing the valve
from the line. Take additional care if
the process fluid is hot, flammable,
caustic, or hazardous.
D Carefully secure the valve in an
upright position. The roundness of the
flanges and valve body allow it to
easily roll from side-to-side. The
combined weight of the valve/actuator
assembly could cause injury or
property damage when falling to the
side.
D Use lock-out procedures to be
sure that the above measures stay in
effect while you work on the
equipment.
D The valve packing box may
contain process fluids that are
pressurized, even when the valve has
been removed from the pipeline.
Process fluids may spray out under
pressure when removing the packing
hardware or packing rings, or when
loosening the packing box pipe plug.
May 2010