Cashco CA-2 - Manual (Page 3)

IOM-CA 3
SECTION V
V. SHUTDOWN
A. General:
1. Maintenance procedures hereinafter are
based upon removal of the regulator unit from
the pipe line 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 CA-1 or CA-2 for
the basic regulator. Blow-ups of options are
in clud ed with each drawing.
B. Diaphragm Replacement
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 sys tem pressure must be constantly
ob served and man u al ly regulated. Close the out-
let (down stream) block valve.
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
VI. MAINTENANCE
2. Relax range spring (6) by loosening the
lock nut (4) and turning ad just ing screw (3)
CCW until re moved from spring cham ber (2).
NOTE: If the Option -2 handwheel is utilized,
the ad just ing screw (3) and lock nut (4) are re-
placed with a knob (18) and lock nut (4). With
the Option-22 panel mounting w/handwheel,
the ad just ing screw (3) and lock nut (4) are
replaced with a knob (18), lock nut (4) and a
panel mounting nut (19).
3. Loosen spring chamber (2) by placing wrench
on “fl ats” and rotating CCW.
4. Remove spring chamber (2), spring button (5)
range spring (6), and diaphragm stop (9).
5. Remove the diaphragm subassembly con sist-
ing of the pressure plate nut (7), lock wash er
(8), pressure plate (10), diaphragm (11), plug
gasket (13) and plug (14). NOTE: Refer to the
quan tity of dia phragms (11) in cor po rated per
the bill of ma te ri als listing. De pend ing on inlet
pressure level, multiple metal diaph ragms
(11) may be “stacked”.
1. Securely install the body (1) in a vise with the
spring chamber (2) directed upwards.
6. Loosen pressure plate nut (7) and sep a rate
all parts (7, 8, 10, 11, 13 & 14) of the di a-
phragm sub as sem bly.
7. Inspect pressure plate (10) to ensure no
de for ma tion due to over-pressurization. If
de formed, re place.
SPRING UNDER COMPRESSION. Prior to re-
mov ing spring chamber, relieve spring compres-
sion by back ing out the ad just ing screw. Failure
to do so may result in fl ying parts that could cause
personal injury.
WARNING 3
CAUTION C
To prevent damage to body, use lead jaws when
placing body in a vise. Position so that vise closes
over inlet and outlet of the body.
WARNING 2
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.
Model's CA-1/CA-2 Diaphragm Sub as sem bly
CAUTION B
Do not walk away and leave a bypassed reg u -
la tor unattended.
8
11
13
7
10
14