cashco 1465 Manuale di installazione, funzionamento e manutenzione - Pagina 3
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V. SHUTDOWN
1. On systems with a bypass valve, and where sys tem
pressure is to be maintained as the regu la tor is
shut down, slowly open the bypass valve while
closing the inlet (up stream) block valve. Fully
close the inlet (upstream) block valve. (When on
bypass, the system pressure must be con stantly
observed and manually reg u lat ed. ) Close the
outlet (down stream) block valve.
VI. MAINTENANCE
SYSTEM UNDER PRESSURE. Prior to per form ing any
main te nance, isolate the reg u la tor from the sys tem
and relieve all pres sure. Failure to do so could result
in personal injury.
A. General:
1. Maintenance procedures hereinafter are
based upon re mov al of the regulator from
the pipe line where in stalled.
2. Owner should refer to owner's procedures for
removal, handling, cleaning and dis posal of
non-reusable parts, i.e. O-rings, etc.
3. Refer to Figure 1 for the standard regu la tor
and its options.
B. Diaphragm Replacement:
1. Securely install the body (1) in a vise with the
spring chamber (2) directed up wards.
SPRING UNDER COM PRES SION. Prior to re mov ing
spring chamber, relieve spring com pres sion by
back ing out the ad just ing screw or handwheel. Failure
to do so may result in flying parts that could cause
per sonal in ju ry.
2. Relax range spring (10) by turning ad just ing
screw (12) CCW until removed from spring
cham ber (2). NOTE: If the Option -2 or -22 is
utilized, the adjusting screw (12) and locknut
(13) are replaced with a knob (18) and locknut
(13). With the Option -2 +80 or -22 + 80, the
ad just ing screw (12) and lock nut (13) are
replaced with a handwheel subas sem bly (20)
and lock nut (13).
3. Loosen spring chamber (2) by placing wrench
on "flats" and rotating CCW. DO NOT use the
flats on either side of the vent hole.
IOM-1465
WARNING
WARNING
SECTION V
Do not leave a bypassed reg u la tor unattended.
2. If the regulator and system are to both be
shut down, slowly close the inlet (upstream) block
valve. Close the outlet (downstream) valve only
if reg u la tor re mov al is required.
SECTION VI
4. Remove spring chamber (2), spring button
(11), and range spring (10). NOTE: For
units with Option -80 (spring ranges 270-400
psig (18.6-27.6 Barg) and 360-500 psig (24.8
-34.5 Barg)) also remove the thrust bearing
(15), upper bear ing washer (16), and lower
bearing wash er (17). Inspect threads of spring
chamber (2) for cleanliness.
5. Remove pressure plate (9) and inspect
to ensure no deformation due to over-
pres suri za tion. If deformed, replace.
6. Remove diaphragm(s) (8), O-ring (7) and
push er plate (6). Inspect pusher plate (6)
to ensure no deformation
pres suri za tion. If de formed, re place. Dis card
O-ring (7) and diaphragm(s) (8).
7. Clean body (1) and body recess according
to owner's procedures. NOTE: On regulators
orig i nal ly sup plied as "oxygen clean", Option
1465-55, main te nance must include a lev el
of clean li ness equal to Cash co's clean ing
Stan dard #S-1134. Con tact factory for details.
8. Install new O-ring (7) and diaphragm(s) (8).
NOTE: Refer to the quantity of diaphragm(s)
(8) in cor po rat ed in the bill of materials list ing.
De pend ing on outlet pressure level, multiple
metal di a phragms may be "stacked".
9. Visually center pressure plate (9) on
diaphragm(s) (8). Place the range spring (10)
on to the retainer hub of the pressure plate
(9).
10. Place multi-purpose, high temperature grease
into the depression of the spring button (11)
where adjusting screw (12) bears. Set spring
button (11) onto range spring (10); ensure
spring button (11) is laying flat. NOTE: For
units with Option -80 (spring ranges 270-400
psig (18.6-27.6 Barg) and 360-500 psig (24.8-
34.5 Barg) position spring button (11), thrust
CAUTION
due to over-
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