Cashco 8310LP - Manual (Page 3)

3 IOM-8310HP/LP-BASIC
Model
Diaphragm
Material
Torque
Bolt
Size
8310HP ALL 45 ft-lbs (61 Nm) 5/8" Ø
8310LP ALL 45 ft-lbs (61 Nm) 1/2" Ø
SPRING UNDER COMPRESSION. Prior to re mov ing
fl ange bolts, relieve spring compression by removing
the ad just ing screw. Failure to do so may result in fl ying
parts that could cause per son al injury.
WARNING 2
2. Relax range spring (28) by turning ad just ing screw
(or T-bar) (32) CCW (viewed from above) until
re moved from spring chamber (13).
3. Draw or embed a match mark between di a phragm
case (14) and spring chamber cast ing (13) along
fl anged area.
4. Remove all fl ange nuts (30) and bolts (29).
5. Remove spring chamber (13), spring button (27),
and range spring (28).
6. Draw second match mark on diaphragm case
(14) fl ange in alignment with a match mark on the
threaded end of the valve plug assembly (12) to
indicate “free vertical movement” position of the
valve plug assembly (12).
7. Securing the “fl ats” on the threaded end of the
valve plug assembly (12) with ad just able wrench,
re move pressure plate nut (24) by rotating CCW
(viewed from above).
NOTE: Do not rotate the valve plug assembly (12).
The plug (12.1) and seat rings (10 & 11) have been
me chan i cal ly lapped at the factory per ANSI Class
II seat leakage and assembled to pro vide op ti mum
“free vertical movement”.
8. Pry loose pressure plate (22) from diaphragm(s)
(20) and remove both. In spect to ensure no de for -
ma tion due to over-pres sur iza tion. If de formed,
replace.
NOTES: 1. Not re mov ing the pusher plate (17) or
rotating the valve plug assembly (12) will pro vide
per for mance equal to orig i nal fac to ry per for mance
when diaphragm(s) (20) is re placed with a like
diaphragm(s) (20). Refer to Section VI.C, steps
12 and 13 for correct diaphragm setting if pusher
plate (17) or stem lock nut (19) is re moved, or valve
plug as sem bly (12) is rotated.
2. Refer to quantity of diaphragm(s) (20) in cor po-
rat ed in the bill of ma te ri als listing. De pend ing on
outlet pressure level, multiple metal di a phragms
may be “stacked”.
9. Remove diaphragm gasket (21) and pusher plate gas-
ket (18). Clean gasket sealing sur fac es thor ough ly.
10. Install new diaphragm gasket (21) on di a phragm
case (14) fl ange and new pusher plate gasket (18)
on pusher plate, if required. NOTE: No gaskets
utilized with a com po si tion (soft) di a phragm).
11. Position new diaphragm(s) (20) over threaded end
of valve plug assembly (12).
12. Ensuring that the curved outer rim side of the pres-
sure plate (22) rests against the diaphragm(s) (20)
directly, place the pres sure plate (22) over threaded
end of the valve plug assembly (12).
13. Install pressure plate nut (24) on threaded end of
valve plug as sem bly (12) and tighten to a torque
value of 75-80 Ft-lbs (101-108 Nm) for metal di a-
phragm, or 30-35 Ft-lbs (40-47 Nm) for com po si tion
di a phragm. Main tain align ment of match marks on
the valve plug as sem bly (12) with second match
mark on di a phragm case (14) fl ange. NOTE: Use
two fl ange bolts (29) to keep multiple di a phragms'
(20) bolt holes prop er ly aligned while tight en ing
pres sure plate nut (24). DO NOT USE FINGERS
TO HOLD DI A PHRAGMS (20) DUR ING TIGHT EN-
ING OF PRES SURE PLATE NUT (24).
14. Set range spring (28) on retainer hub of pres sure
plate (22).
15. Place multi-purpose, high temperature grease into
depression of spring button (27) where ad just ing
screw (or T-bar) (32) bears. Set spring button (27)
on to range spring (28); ensure spring button (27)
is laying fl at.
16. Aligning the match marks, place spring cham ber
(13) over the above stacked parts. In stall all fl ange
bolts (29) and fl ange nuts (30). Me chan i cal ly
tight en bolting (29) (30) in a cross pattern that al-
lows spring cham ber (13) to be pulled down evenly.
Rec om mend ed torque values are as fol lows:
VI. MAINTENANCE
SYSTEM UNDER PRESSURE. Prior to performing any
main te nance, isolate the regulator from the system and
relieve all pressure. Failure to do so could result in
personal injury.
SECTION VI
WARNING 1
A. General:
1. Maintenance procedures hereinafter are based
upon removal of the regulator unit from the pipeline
where installed.
2. Owner should refer to owner’s pro ce dures for
re mov al, handling, cleaning and disposal of non-
reuseable parts, i.e. gaskets, etc.
3. Refer to Figure 1 for standard regulator (NOTE:
“LP” variation has larger di a phragm area than “HP”
variation). Refer to Figures 2 through 4 for option
blow-ups.
B. Diaphragm Replacement:
1. Using an overhead hoist, lift regulator on to a fl at
surface work bench.