IOM-ALR-1
3
8. When flow is established steady enough that the
outlet (downstream) block valve is fully open, begin
to slowly close the bypass valve if installed.
9. Develop system flow to a level near its expected
normal rate, and reset the pressure for the main
regulator to the desired outlet pressure by adjust-
ing the unloader pressure setpoint.
SECTION VI
10. Reduce system flow to a minimum level and
observe pressure set point. Outlet pressure
will rise from the set point of Step 9 for a Model
ALR-1. The max i mum rise in outlet pres sure on
de creas ing flow should not exceed the 10%. If
it does, consult factory.
VI. SHUTDOWN
1. On systems with a bypass valve, and where sys-
tem pressure is to be main tained as the reg u la tor
is shut down, slowly open the bypass valve while
closing the inlet (up stream) block valve. Fully
close the inlet (up stream) block valve. (When on
bypass, the sys tem pres sure must be con stant ly
observed and man u al ly reg u lat ed. Close the outlet
(down stream) block valve.
2. Rotate the unloader adjusting screw CCW until
removed to relieve any trapped upstream loading
pres sure in the dome.
3. 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.
VII. MAINTENANCE
A. General:
Item Dynamic
No.
Seal Type
Part Description
13
..................... All
.....................................Guide
Bearing
14 ..................... All ................................. Static Stem Seal
14.1 ............... All ...................... Upper Static Stem Seal
14.2 ............... All ......................Middle Static Stem Seal
14.3 ............... All ...................... Lower Static Stem Seal
15 ..................... All ................................ Cage O-ring Seal
16
....................CW,
................................................. Wiper
17.1
.................CW,
.................................... Wiper Washer
17.3..................
UC.......................................Seal Retainer
19
..................... All
................................................... Cage
20
..................... All
...........................................Valve
Plug
21
..................... All
............................................ Seat
Ring
27 ..................... All ............................. Dynamic Side Seal
27.1 .............. CW .................................... TFE Cap Seal
27.2
..............
CW
........................ O-ring Energizer/Seal
27.3 .............. UC .......... U-Cup Seal w/Metal Energizer
27.4
.............. OR
....................................... O-Ring
Seal
SECTION VII
A detailed view of the dynamic side seal parts
is shown in Figure 1 on the next page.
NOTE:
On regulators originally supplied
as “oxygen clean” – Opt-55, maintenance
must include a level of cleanliness equal to
Cashco cleaning standard #S-1134.
5. The Inner Trim Assembly (Figure 3) is
re moved and replaced in the body (23) as
an assemblage of parts. The Inner Trim
Assembly, here in af ter called
ITA
, consists
of the following parts:
1. The ALR-1 may be serviced without re mov ing
the regulator from pipeline. The reg u la tor is
designed with quick-change trim to simplify
maintenance.
2. Record the nameplate information to req-
ui si tion repair parts for the regulator. The
in for ma tion should include: size, Product
Code, Serial Number, and internal or ex ter nal
sens ing.
(NOTE:
Never both types of sens-
ing.)
If external sensing is used, be sure that
the external sensing line is dis-connected.
3. Refer to Section X for recommended repair
parts. Only use original equipment parts
sup plied by Cashco for re build ing or re pair-
ing reg u la tors.
4. Owner should refer to owner's procedures
for removal, handling, cleaning and disposal
of nonreuseable parts, i.e. gaskets, etc.
WARNING
SYSTEM UNDER PRESSURE. Prior to per form ing any
maintenance, isolate the reg u la tor from the system and
relieve all pressure. Failure to do so could result in
personal injury.
CAUTION
Do not walk away and leave a bypassed reg u la tor
unattended!
