Cashco DA5 - Manual (Page 3)

IOM-DA5 3
9. Reduce system fl ow to a minimum level and ob-
serve pressure set point. Inlet pressure will de-
crease from the set point of Step 8. The max i mum
build in inlet pressure on increasing fl ow should not
exceed the stated upper limit of the range spring
by greater than 30%. If it does, consult factory.
VI. SHUTDOWN
1. Shutoff inlet block valve.
2. Remove range spring compression by turning the
adjusting screw CCW to reduce the inlet pressure.
3. Shutoff the outlet block valve.
4. Relieve the trapped upstream and downstream
pres sure.
5. The regulator may now be removed from the
pipe line or disassembled for inspection and pre-
ven ta tive main te nance while in-line.
VII. MAINTENANCE
A. General:
1. The regulator may be serviced without re-
mov ing the regulator from pipeline. The
regulator is designed with quick-change trim
to simplify maintenance.
2. Record the nameplate information to req ui -
si tion spare parts for the regulator. The
in for ma tion should include: size, KM Product
Code, Serial Number.
3. Refer to Section IX for selection of recom-
mended spare parts. Only use original
equipment parts sup plied by Cashco/KM for
re build ing or re pair ing regulators.
4. Owner should refer to owner's procedures for
removal, handling, cleaning and disposal of
nonreuseable parts, i.e. gaskets, etc.
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 (ITA) is re moved and
re placed in the body (23) as an as sem blage
of parts. The ITA consists of the fol low ing
parts:
Item Dynamic Side
No. Seal Type Part Description
7 ...................... All ........................... Diaphragm Fastener
(Cap Screw or Locknut)
8 ...................... All .......Upper Diaphragm Pressure Plate
9 ...................... All ...................................... Diaphragm(s)
10 ..................... All ..........Lower Diaphragm Pusher Plate
13 .................... All......................... Piston/Guide Bearing√
14 ..................... All ......................................... Stem Seals
14.1 ............... All ................................ Upper Stem Seal
14.2 ............... All ................................Middle Stem Seal
14.3 ............... All ..............................Lower Stem Seal√
14.4 ............... All ................ Lower Pusher Plate Gasket
20 ..................... All ...........................................Valve Plug
27 ..................... All ........................... Dynamic Side Seal *
27.1 ...............CP ..................................... TFE Cap Seal
27.2 ...............CP ......................... O-ring Energizer/Seal
27.3 .............. UC .......... U-Cup Seal w/Metal Energizer
27.5 ...............PR ................................. Piston Ring Seal
27.6 ...............PR ................. Piston Ring SST Energizer
28 ..................... All ............................................ Seat Disc
29 ..................... All ............................... Seat Disc Washer
30 ..................... All ......................................Seat Disc Nut
* The Dynamic Side Seal (27) and the Cage Seal (15) are
omitted for the FTC fl ow direction regulator. This is Type
NO. See Figure 1.
√ 2-1/2" thru 4" body sizes only.
SECTION VII
SECTION VI
A detailed view of the dynamic side seal parts is
shown in Figure 1 on the next page.