cashco 1000HP-36 Інструкція з монтажу, експлуатації та технічного обслуговування - Сторінка 3

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cashco 1000HP-36 Інструкція з монтажу, експлуатації та технічного обслуговування
IV. STARTUP
1. Purge the system, including the spring cham ber,
to remove air, moisture, carbon dioxide, etc.
2. Start with the block valves closed. A bypass
valve may be used to maintain outlet pressure
in the downstream system without changing the
fol low ing steps.
3. Relax the range spring by turning the adjusting
screw counterclockwise (CCW) a min i mum of
three (3) full revolutions. This re duces the outlet
(down stream) pres sure set point. NOTE: Ro ta tion
CW or CCW is as viewed from the ad just ing screw
end, i.e. bottom of valve looking up.
4. If equipped with a bypass valve, slowly open
the bypass valve to cool the system piping and
to allow slow contraction of the piping. Closely
monitor outlet (down stream) pressure via gauge
to ensure not over-pres sur iz ing. NOTE: If no
bypass valve is in stalled, extra caution should
be used in starting up an am bi ent tem pera ture
system; i.e. do everything slow ly.
5. Crack open the outlet (downstream) block valve.
6. Slowly open the inlet (upstream) block valve
ob serv ing the outlet (down stream) pres sure
gauge. Determine if the regulator is flowing. If
V. SHUTDOWN
1. On systems with a bypass valve, and where
sys tem pressure is to be maintained as the
reg u la tor is shut down, slowly open the by pass
valve while clos ing the inlet (up stream) block
valve. Fully close the inlet (up stream) block valve.
(When on bypass, the system pres sure must be
con stant ly observed and man u al ly reg u lat ed.)
Close the outlet (down stream) block valve.
VI. MAINTENANCE
A. General:
1. Maintenance procedures hereinafter are
based upon removal of the regulator unit
from the pipeline where in stalled.
IOM-1000HP-Cryogenic
SECTION IV
not, slowly rotate the reg u la tor ad just ing screw
clockwise (CW) until flow begins.
7. Continue to slowly open the inlet (up stream) block
valve until fully open.
8. Continue to slowly open the outlet (down stream)
block valve, especially when the down stream
piping system isn't pres surized. If the outlet
(downstream) pressure exceeds the de sired
pres sure, close the block valve and go to Step 2,
then return to Step 4.
9. When flow is established steady enough that the
outlet (downstream) block valve is fully open,
begin to slowly close the bypass valve if in stalled.
10. Develop system flow to a level near its expected
normal rate, and reset the regulator set point by
turning the adjusting screw CW to increase outlet
pressure, or CCW to reduce outlet pres sure.
11. Reduce system flow to a minimum level and
ob serve set point. Outlet pressure will rise from
the set point of Step 9. The maximum rise in
outlet pressure on decreasing flow should not
exceed the stated up per limit of the range spring
by greater than 30%; i.e. 10-40 psig range spring,
at low flow the outlet pressure should not exceed
52 psig. If it does, consult fac to ry.
SECTION V
2. If the regulator and system are to both be
shut down, slowly close the inlet (upstream) block
valve. Close the outlet (down stream) valve only if
regulator re mov al is required.
Do not walk away and leave a bypassed regulator unat-
tended.
SECTION VI
2. Owner should refer to owner's proce dures for
removal, handling and cleaning of reusable
parts, and disposal of nonreusable parts, i.e.
asbestos gaskets, suitable sol vents, etc.
CAUTION
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