Cashco 2296HF - Manual (Page 2)

2 IOM-2296
System start-up strainers, for removal shortly
after initial start-up, are recommended.
5. Field hydrostatic testing the completed piping
system to 1-1/2 x CWP in psig indicated on
the nameplate, including the 2296 / 2296HF,
is acceptable. If hydro test pressure exceeds
the 1-1/2 x CWP limit, the 2296 / 2296HF
must be removed for such testing. Before
pressurization, the valve plug should be lifted
from the seat if of ATO-FC action. Tighten
packing as required.
6. In placing thread sealant on pipe ends prior
to en gage ment, ensure that excess material
is removed and not allowed to enter the valve
upon start-up.
7. Flow Direction: Install so the fl ow direction
match es the arrow marked on the body.
8. For best performance, install in well drained
hor i zon tal pipe, properly trapped if a steam
service ap pli ca tion.
9. Valves are not to be direct buried un der ground.
10. Insulation may be applied as indicated in
Figure 2. Drainage away from the packing
area must be ensured when fully installed,
sealed and lagged for outdoors installation.
Figure 1: Typical Control Valve Station
Figure 2: Body Insulation
Limit of
Bonnet
Insulation
2. Pipe unions are recommended for NPT
screwed in stal la tions to allow complete re-
mov al from system.
3. If pipe reducers are located before and/or after
the valve body, keep the reducers as close as
practical to the valve body; this is especially
important where the reducers are more than
one line size larger than the valve body size,
which is common in gaseous ser vice.
4. Clean the piping of all foreign debris, including
chips, weld scale, weld spatter, oil, grease,
sand or dirt prior to installing the control
valve. This is an absolute re quire ment for
valves supplied with composition soft seats.
SECTION III
III. INSTALLATION
A. Orientation:
1. Recommended orientation when installed in
a hor i zon tal pipeline is with the stem vertical.
Valves may also be installed in vertical pipe-
lines with stems horizontal.
2. Outdoors, all installations may be oriented any
angle from horizontal-to-vertical.
3. Valves are not recommended for in stal la tion
with the actuator oriented down wards.
B. Piping System:
1. It is recommended that the control valve unit
be installed with a double-block and bypass
as indicated in Figure 1. This arrangement is
recommended especially where main te nance
will be done on the valve body while still in-
stalled in the pipeline.
11. Undue piping stress/strain or bending torques
may not be transmitted through the control
valve body. One pipe (inlet or outlet) should
be anchored rigidly for piping that is “hot” or
“cold” with respect to ambient temperature;
the re main ing pipe (inlet or outlet) should be
supported and guided to ensure uni di rec tion al
expansion/con trac tion.