Cashco 5381 - Manual (Page 3)

IOM-5381 3
VI. MAINTENANCE
SYSTEM UN DER PRES SURE. Prior to performing
any maintenance, isolate the reg u la tor from the sys-
tem and relieve all pres sure. Failure to do so could
result in personal injury.
To prevent damage to body, use lead jaws when
clamping body in a vise. Position body so that
vise does not close over inlet and outlet connec-
tions.
1. Securely install the body (1) in a vise with
the spring chamber (2) oriented up wards.
A. General:
1. Maintenance procedures here in af ter are
based upon removal of the reg u la tor unit
from the pipeline where installed.
2. Owner should refer to owner's pro ce -
dures for re mov al, handling, cleaning
and disposal of non reuseable parts, i.e.
gas kets, etc.
3. Refer to Figure 2 for basic regulator, item
number reference ( ).
B. Diaphragm Replacement:
SPRING UNDER COMPRESSION. Prior to re mov-
ing spring chamber, relieve spring com pres sion by
back ing out the adjusting knob. Failure to so so
may result in fl ying parts that could cause personal
injury.
2. Relax range spring (17) by turning adjust-
ing knob (30) CCW until re moved from
spring cham ber (2).
3. Loosen spring chamber (2) by placing
wrench on “fl ats” and rotating CCW mak-
ing sure not to use the fl at where the vent
hole is located.
4. Remove spring chamber (2), range spring
(17) and spring button (5).
11. For metal diaphragm(s) (13), place
dia phragm gas ket (14) into body re cess
(none re quired for com po si tion di a-
phragm). Set di a phragm sub as sem bly
into the body.
Sizes Diaphragm Torque Value
ALL
Metal 60 in/lbs. (6.8 Nm)
Composition 15 in/lbs. (1.7 Nm)
6. Loosen pressure plate nut (10) and
sep a rate all parts (3, 4, 9, 13 & 15) of the
diaphragm sub as sem bly.
7. Inspect pressure plate (3) to assure no
de for ma tion due to over-pressurization.
If de formed, re place.
8. Remove di a phragm gasket (14). (If a
composition di a phragm is used there is
no di a phragm gasket (14).
9. Clean inside body surfaces in ac cor-
dance with Owner's cleaning pro ce dures.
Do not scratch di a phragm O-ring seat-
ing surface NOTE: Maintenance must
in clude a level of clean li ness equal to
Cash co clean ing stan dard #S-1576.
Con tact fac to ry for details.
10. Reassemble diaphragm subassembly
by plac ing push er plate O-ring (15),
diaphragm(s) (13), pressure plate (3) and
lock washer (9) over the threaded post
of pusher plate (4). As sure the pres sure
plate (3) is placed with curved outer rim
down next to the di a phragm (13) surface.
Tighten pusher plate nut (4) to the fol low -
ing torque values:
5. Remove the diaphragm subassembly
con sist ing of the pressure plate nut
(10), lock wash er (9), pres sure plate (3),
di a phragm (13), push er plate O-ring (15)
and pusher plate (4). NOTE: Refer to the
quan tity of dia phragms (13) in cor po rated
per the bill of ma te ri als listing. De pend ing
on outlet pres sure level, multiple metal
diaph ragms may be “stacked”.
Figure 1: Diaphragm Sub as sem bly
SECTION VI
WARNING
CAUTION
WARNING
13
9 10
3
15
4