cashco 964 Установка, эксплуатация и обслуживание - Страница 2
Просмотреть онлайн или скачать pdf Установка, эксплуатация и обслуживание для Блок управления cashco 964. cashco 964 16 страниц. Globe-style pneumatic control valve unit body iom
Печатать страницуFor welded installations, all internal trim parts and
seals, must be removed from body prior to welding
into pipeline. The heat of fusion welding will dam age
non-metallic parts if not re moved.
not apply to units equipped with extended pipe nip ples.
III. INSTALLATION
A. Orientation:
1. Recommended ori en ta tion when in stalled in
a hor i zon tal pipeline with the stem ver ti cal.
Valves may also be in stalled in ver ti cal
pipe lines with stems hor i zon tal.
Figure 1: Typical Control Valve Station
2. Outdoors, all in stal la tions may be ori ent ed any
angle from hor i zon tal-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 in stalled with a double-block and bypass
as in di cat ed in Figure 1. This ar range ment is
rec om mend ed es pe cial ly where main te nance
will be done on the valve body while still in-
stalled in the pipeline.
2. Pipe unions are recommended for NPT
screwed or socket welded installations to al low
complete removal from sys tem. If re mov al
for main te nance is by cutting torch for socket
welded valves, leave sufficient pipe nipple
space be tween the 964 body and the next
piping com po nent up or down stream to allow
socket weld couplings for re-in stal la tion.
2
CAUTION
NOTE: This does
SECTION III
3. If pipe reducers are located before and/or after
the valve body, keep the reducers as close as
prac ti cal 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, in clud ing
chips, weld scale, weld spatter, oil, grease,
sand or dirt prior to in stall ing the control valve.
This is an absolute re quire ment for valves
supplied with composition soft seats. System
start-up strain ers, for removal shortly after
initial start-up, are rec om mend ed.
5. Field hydrostatic testing the com plet ed piping
system to 1-1/2 x CWP in psig indicated on the
nameplate, including the 964, is ac cept able.
If hydro test pressure exceeds the 1-1/2 x
CWP limit, the 964 must be re moved for such
testing. Before pres sur iza tion, the valve plug
should be lifted from the seat if of ATO-FC
action. Tighten packing as re quired.
6. In placing thread sealant on pipe ends prior
to en gage ment, ensure that excess ma te ri al
is removed and not allowed to enter the valve
upon start-up.
7. Flow Direction: Install so the flow direction
match es the arrow marked on the valve 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 in di cat ed in Figure
2. Drain age away from the packing area must
be ensured when fully in stalled, sealed and
lagged for outdoors in stal la tion.
Limit of
Bonnet
Insulation
Figure 2: Body Insulation
IOM-964