Cashco P1 - Manual (Page 3)

IOM-P1 3
SECTION VI
VI. MAINTENANCE
To prevent damage to body, use soft jaws when
placing body in a vise. Position so that vise closes
over the fl ats on lower end of body.
5
SPRING UNDER COMPRESSION. Prior to re mov-
ing spring chamber, relieve range spring com pres-
sion by turn ing knob (4) CCW until ro ta tion comes
to a com plete stop. Fail ure to so so may result in
fl ying parts that could cause personal injury.
WARNING
CAUTION
A. General:
1. Maintenance procedures hereinafter are
based upon re mov al of the regulator unit from
the pipeline where in stalled.
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 2 for basic reg u la tor and Fig-
ure 1 for the diaphragm subassembly.
B. Diaphragm Replacement:
1. Securely install the body (1) in a vise with the
knob (4) directed upwards.
2. Relax range spring (15) by turning knob (4)
CCW until rotation comes to a complete stop.
NOTE: It is not necessary to remove knob (4)
before removing the spring chamber (6) from
the body (1).
3. Remove spring chamber (6) by grasping the
fl ats and turning CCW. Upon removal, the
range spring (15), range spring clip (16), and
spring button (5) should remain inside the
spring cham ber (6).
4. Remove diaphragm subassembly (7) con-
sist ing of the actuator nut (7.3), diaphragm
(7.1), ac tu a tor post (7.2), ac tu a tor gasket
(7.4), ac tu a tor o-ring (7.5). Remove di a -
phragm gas ket (10).
5. Remove actuator nut (7.3) and separate all
parts of the diaphragm subassembly (7).
6. Clean body (1) diaphragm fl ange and all re us-
able parts according to owner's procedures.
Do not scratch di a phragm gas ket seat ing
sur face. NOTE: On reg u la tors origi nally
sup plied as “oxygen clean”, Option-M, main-
tenance must in clude a level of clean li-
ness equal to Cash co's clean ing stan dard
#S-1134. On regulators originally suppled for
Sanitary Service, maintenance must in clude
a level of clean li ness equal to Cash co clean-
ing stan dard #S-1576. Contact factory for
details.
7. Inspect and replace any necessary parts.
NOTE: Use only parts man u fac tured and
supplied by Cashco, Inc. for these products.
See Section VIII.
8. Reassemble di a phragm subassembly (7) by
plac ing the actuator gasket (7.4), di a phragm
(7.1), and actuator o-ring (7.5) over the
threads of the actuator post (7.2). Place a
thread sealant com pound on the threads of
the ac tu a tor post (7.2) prior to installing the
actuator nut (7.3). Install ac tu a tor nut (7.3)
and tighten to the fol low ing torque value: 15
Ft-lbs (20 Nm).
9. Place the diaphragm gas ket (10) onto the
body (1) diaphragm fl ange. Place di a phragm
sub as sem bly on top of the gasket (10).
10. Lubricate the threads of the body (1) with
a light weight grease that is compatible with
service use. Ro tate the spring chamber (6)
CW by hand onto the threaded portion of
the body (1) until fi rmly seated against the
Figure 1: Diaphragm Subassembly
WARNING
SYSTEM UN DER PRES SURE. Prior to per form ing
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.