Cashco P3 - Manual (Page 4)

IOM-P3 4
8. Inspect and replace any necessary parts.
NOTE: Use only parts man u fac tured and
sup plied by Cashco, Inc. for these products.
See Section VIII.
9. 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). NOTE: Use
the thickest of the two diaphragms (7.1) for
1st Stage diaphragm subassembly (7). Place
a thread sealant com pound on the threads of
the actuator post (7.2) prior to installing the
actuator nut (7.3). Install ac tu a tor nut (7.3)
and tight en to the fol low ing torque value: 15
Ft-lbs (20 Nm).
10. Place the 1st stage diaphragm gas ket (10)
onto the body (1) diaphragm fl ange area.
Place 1st stage diaphragm subassembly (7)
on top of the gasket (10).
11. 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
diaphragm gasket (10). Tighten to the fol low-
ing torque val ue: 65–70 Ft lbs (88–95 Nm).
12. Recalling height value of C.2, rotate adjust-
ing screw (2) CW to compress spring (15) to
factory established pressure set point. Hand
tighten acron nut (4) on adjusting screw (2).
12. Invert the body (1). Repeat Steps 9 thru 11
for 2nd stage diaphragm subassembly (7).
13. Pressurize with air and spray liquid leak de-
tec tor around body (1) and spring chambers
(6) to test for leakage. En sure that an outlet
pres sure is main tained during this leak test
of at least mid-range spring level; i.e. 2-100
psig (.14-6.9 Barg) range spring, 51 psig
(3.5 Barg) test pres sure minimum.
D. Trim (Seat) Replacement:
1. Remove spring chamber subassemblies and
diaphragm subassemblies per Section VI.
Steps B and C.
2. Remove seat retainers (13) by rotating seat
CCW.
3. Remove poppets (8) and poppet springs (9).
4. Clean debris from within the body (1) cavity.
Clean all parts to be reused according to
own er's pro ce dures.
NOTE: On reg u la tors origi nally sup plied as “oxy-
gen 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. Contact factory
for de tails.
5. Inspect all parts for damage and replace if
necessary. NOTE: Use only parts man u fac-
tured and supplied by Cashco, Inc. for these
products. See Section VIII.
6. Place the 1st stage poppet spring (9) into
body (1) cav i ty.
7. Place poppet (8) inside the poppet spring
(9). NOTE: The angled seating surface of
the pop pet (8) must face up toward the seat
(12).
8. Install new seat retainer (13) with seat (12)
into body (1) cav i ty with the seat facing down-
ward toward the angled seat ing surface of the
pop pet (8). Tighten seat re tain er (13) to the
following torque val ue: 12 – 15 Ft-lbs (16 – 20
Nm).
9. Reinstall the 1st stage diaphragm subassem-
bly (7) and spring chamber subassembly(2)
per Sec tion VI, Steps B and C.
10. Invert the body (1) and repeat Steps 6 thru 9
for the 2nd stage reassembly.
11. Bench test unit for suitable operation. NOTE:
Regulators are not tight shutoff devices.
Even if pressure builds up beyond set point,
a reg u la tor may or may not develop bubble
tight shutoff.
12. Pressurize with air and spray liquid leak de-
tec tor around body (1) and spring cham bers
(2.1) to test for leakage. En sure that an outlet
pressure is main tained during this leak test
of at least mid-range spring level; i.e. 2-100
psig (.14-6.9 Barg) range spring, 51 psig
(3.5 Barg) test pres sure minimum.