CV500 Valve
Instruction Manual
Form 5302
July 2006
7
Note
For best shutoff performance, install
the valve with the drive shaft
horizontal and the Vee-Ball closing in
the downward direction for standard
right hand mounting.
6. Install the flange gaskets and insert the valve
between the mating pipeline flanges. For wafer
valves, also make sure the mating line flanges are
aligned. Use flat sheet gaskets compatible with the
process media, or spiral wound gaskets with
compression-controlling center rings.
7.
For wafer valves
, consult the line bolt
clearances required (listed in figure 4) before
installing the line bolts and nuts.
For all valves, install the line bolts and nuts; then,
tighten them using accepted bolting procedures.
These procedures include, but are not limited to,
lubricating the line bolts and hex nuts and tightening
the nuts in a crisscross sequence to ensure proper
gasket load.
8. If a purge is desired for the purged bearing
construction, remove the pipe plugs (keys 29
and 24) and install the purge lines. Purge pressure
should be greater than the pressure within the valve
and the purge fluid should be as clean as possible.
WARNING
A Design CV500 drive shaft is not
necessarily grounded when installed
in a pipeline unless the shaft is
electrically bonded to the valve.
To avoid personal injury or property
damage resulting from the effects of a
static electricity discharge from valve
components in a hazardous
atmosphere or where the process fluid
is combustible, electrically bond the
drive shaft (key 3) to the valve
according to the following step.
Note
Standard Design CV500 packings
(key 13) are composed either entirely
of conductive packing rings (graphite
ribbon packing) or partially of
conductive packing rings (a
carbon-filled PTFE female adaptor with
PTFE V-ring packing or a
graphited-composition packing ring
with PTFE/composition packing) in
order to electrically bond the shaft to
the valve body. Alternate
shaft-to-valve body bonding is
available for hazardous service areas
where the standard packing is not
sufficient to bond the shaft to the
valve (see the following step).
9. For hazardous applications, attach the bonding
strap assembly (key 131, figure 5) to the shaft with
the clamp (key 130, figure 5) and connect the other
end of bonding strap assembly to the valve body
with the cap screw (key 25, figure 5).
10. Connect pressure lines to the actuator as
indicated in the actuator instruction manual. When a
manual actuator (handwheel) is used with a power
actuator, install a bypass valve on the power
actuator (if not already supplied) for use during
manual operation.
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.
If the valve has ENVIRO-SEAL
r
live-loaded packing
installed, readjustment will probably not be required.
See the instruction manual titled ENVIRO-SEAL
Packing System for Rotary Valve
s
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.
Maintenance
WARNING
Avoid personal injury or property
damage from sudden release of
process pressure or bursting of parts.
Before performing any maintenance
operations:
