cashco 2171 Kurulum, Çalıştırma ve Bakım Kılavuzu - Sayfa 3
Kontrolör cashco 2171 için çevrimiçi göz atın veya pdf Kurulum, Çalıştırma ve Bakım Kılavuzu indirin. cashco 2171 8 sayfaları. Back pressure / relief regulators
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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 closing the inlet (up stream) block
valve. Fully close the inlet (upstream) block valve.
(When on bypass, the system pressure must be
constantly ob served and manually regulated.
Close the outlet (down stream) block valve.
VI. MAINTENANCE
SYSTEM UN DER PRES SURE. Prior to performing any
maintenance, isolate the reg u la tor from the system and
relieve all pres sure. Failure to do so could result in
personal injury.
A. General:
1. Maintenance procedures hereinafter are
based upon removal of the regulator unit from
the pipeline where installed.
2. Owner should refer to owner's procedures for
removal, handling, cleaning and disposal of
non reuseable parts, i.e. gaskets, etc.
3. Refer to Figure 1, Model 1171 or 2171 for the
basic regulator and Figure 2, Model 1171 or
2171 for the cryogenic regulator. Blow-ups of
options and the com po si tion seat trim are on
either drawing.
B. Diaphragm Replacement - Model 1171:
To prevent damage to body, use lead jaws when placing
body in a vise. Position body so that vise closes over the
side inlet connections.
1. Install the body (1) in a vise with the spring
chamber (2) oriented upwards.
SPRING UNDER COMPRESSION.
spring chamber, relieve spring compression by back ing
out the ad just ing screw. Failure to do so may result in
flying parts that could cause personal injury.
2. Relax range spring (16) by turning adjusting
screw (5) CCW until removed from spring
cham ber (2).
IOM-1171/2171
WARNING
CAUTION
WARNING
Prior to re mov ing
SECTION V
Do not walk away and leave a bypassed regulator
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 regulator removal is required.
SECTION VI
3. Loosen spring chamber (2) by placing wrench
on "flats" and rotating CCW mak ing sure not
to use the flats on either side of the vent hole.
4. Remove spring chamber (2), range spring
(16), spring button (4).
5. Remove the diaphragm subassembly
con sist ing of the pressure plate nut (7), lock
wash er (6), pressure plate (3), diaphragm
(10), piston O-ring (13) and piston (12).
NOTE: Refer to the quan tity of dia phragms
(10) in cor po rated per the bill of materials.
De pend ing on inlet pressure level, multiple
metal diaph ragms (10) may be "stacked".
6. Loosen pressure plate nut (7) and separate
all parts (3, 6, 7, 10, 12 &13) of the diaphragm
sub as sem bly.
10
13
Model's 1171/2171 Diaphragm Sub as sem bly
7. Inspect pressure plate (3) to ensure no
de for ma tion due to over-pressurization. If
de formed, replace.
8. Remove diaphragm gasket (11).
composition di a phragm is used there is no
di a phragm gasket (11)).
9. Clean body (1) and di a phragm flange.
NOTE: On reg u la tors origi nally sup plied as
"oxygen clean", Op tion s 1171-5 & -55, 2171-
36 & -55, maintenance must in clude a level
of clean li ness equal to Cash co's clean ing
stan dard #S-1134. Con tact fac to ry for details.
CAUTION
6
7
3
12
(If a
3