cashco 1000HP Посібник з монтажу, експлуатації та технічного обслуговування - Сторінка 3
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Також для cashco 1000HP: Інструкція з монтажу, експлуатації та технічного обслуговування (14 сторінок)
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IV. STARTUP
1. Start with the block valves closed. A by pass valve
may be used to maintain outlet pressure in the
down stream system without changing the fol low ing
steps.
2. Remove closing cap and relax the range spring
by turning the adjusting screw counterclockwise
(CCW) a minimum of three (3) full revolutions.
This reduces the outlet (downstream) pressure
set point.
3. If it is a "hot" piping system, and equipped with
a bypass valve, slowly open the bypass valve
to pre-heat the system piping and to allow slow
expansion of the piping. Ensure proper steam
trap operation if installed. Closely monitor outlet
(down stream) pressure, via gauge, to en sure not
over-pressurizing. NOTE: If no bypass valve is
in stalled, extra caution should be used in starting
up a cold system; i.e. do everything slow ly.
Do not walk away and leave a bypassed reg u la tor
unattended!
4. Crack open the outlet (downstream) block valve.
5. Slowly open the inlet (upstream) block valve
ob serv ing the outlet (downstream) pressure gauge.
De ter mine if the regulator is flowing. If not, slowly
rotate the regulator adjusting screw clockwise
(CW) until flow be gins.
V. SHUTDOWN
Loading Pressure must be shut off before shut ting
down the system pressure.
1. To prevent force imbalances and possible
di a phragm failure, the loading pressure (P
should always be shutdown first from its source of
pres sure. Systems se quenc ing must ensure this
oc curs.
3
CAUTION
CAUTION
SECTION IV
6. Continue to slowly open the inlet (upstream) block
valve until fully open.
7. Continue to slowly open the outlet (downstream)
block valve, especially when the downstream
piping sys tem isn't pressurized. If the outlet
(down stream) pressure exceeds the desired
pressure, close the block valve and go to Step 2,
then return to Step 4.
8. When flow is established steady enough that the
outlet (downstream) block valve is fully open, begin
to slowly close the bypass valve if installed.
9. Set the regulator set point (P
ad just ing screw clockwise (CW) to increase outlet
pres sure or CCW to reduce outlet pressure. The
outlet (P
approximate the desired dif fer en tial pressure when
loaded with P
10. Pressurize the source of loading (P
and allow to fill the spring chamber cavity. Slightly
open the bleeder valve to vent any air as the spring
chamber is filling.
11. Develop system flow and pressure and readjust
set point as required to obtain desired response.
Per for mance should be analyzed at minimum and
maximum flow levels.
12. Install closing cap.
SECTION V
2. It is recommended that manual operation not be
attempted by a bypass valve during a shutdown.
3. When the loading pressure (P
shut down, the regulator outlet pressure (P
decrease substantially. When this is observed, the
)
inlet (upstream) block valve may be closed.
Load
) by turning the
set
) pressure under these conditions will
2
.
Load
Load
IOM-1000HP-Dif fer en tial
) pres sure
Load
) has been
) should
2