cashco D Installation, Operation & Maintenance Manual - Page 4
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10. Place multi-purpose, high temperature grease
into de pres sion of spring button (4) where
ad just ing screw bears. Set spring button (4)
onto range spring (14); ensure spring button (4)
is laying flat.
11. Aligning the matchmarks, place spring cham ber
(2) over the above stacked parts. Install all
bolts (8) and nuts (9) by hand tightening.
Mechanically tighten bolting (8 & 9) in a cross
pattern that allows spring cham ber (2) to be
pulled down evenly.
values are as follows:
Regulator
Bolt
Model
Size
Size
3/8" thru 1"
D
5/16"-24
(DN10 thru 25)
1-1/2" (DN40)
7/16"-20
DL
2" (DN50)
1/2"-20
NOTE: Never replace bolting (8 & 9) with just any
bolting if lost. Bolt heads and nuts are marked
with specification identification mark ings. Use only
proper grades as replacements.
12. Reinstall adjusting screw (6) with locknut (7).
13. Spray liquid leak detector around bolting (8 &
9) and body (1) and spring chamber (2) flang es
and test for leak age. En sure that an outlet
pressure is main tained during this leak test of
at least mid-range spring level; i.e. 10-40 psig
(.69 - 2.8 Barg) range spring, 25 psig (1.7 Barg)
test pressure mini mum.
C. Trim Replacement:
1.
Install body (1) in a vise with the body cap (5)
on top and the body (1) flange down wards.
2.
Loosen and remove body cap (5).
3.
Remove piston spring (17), piston (15), cyl in der
(16) and pusher plate (11). For Opt.-20 do not
remove pusher plate (11). Inspect parts for
excessive wear, espe cially at seat sur fac es.
Re place if worn, nicked or de pressed. (Valves
equipped with Opt-4 Sta bi liz er will have the
u-cup stabilizer seal (32) re moved when the
piston (15) is removed from body (1). Re move
stabilizer seal (32), if installed).
4.
Remove the cylinder gasket (18) and clean
con tact ing surface of body (1).
5.
Clean flat mating surfaces of body (1) to body
cap (5) shoulder.
4
Rec om mended torque
Metal
Comp.
Diaphragm
Diaphragm
20-24 Ft-Lbs
16-20 Ft-Lbs
(27-32 N-m)
(22-27 N-m)
32-36 Ft-Lbs
28-32 Ft-Lbs
(43-49 N-m)
(38-43 N-m)
42-48 Ft-Lbs
32-36 Ft-Lbs
(57-65 N-m)
(43-49 N-m)
6.
Clean debris from within body (1) cavity. Clean
parts to be reused.
NOTE: On regulators originally supplied as
"oxygen clean", Option D-5 , D-36, D-55, or
DL-55, maintenance must include a level
of clean li ness equal to Cashco cleaning
stan dard #S-1134.
sup plied as "cleaned for Phar ma ceu ti cal and
Food applications", Option D-37 or D-37S,
main te nance must include a level of clean li ness
equal to Cashco clean ing standard #S-1576.
Contact factory for details.
7.
Reinstall the pusher plate (11). Ensure prop er
position of flat surface being down wards.
Ensure centered.
8.
Reinstall a new cyl in der gasket (18). Press firmly
and evenly into place using the cyl in der (16).
Do not use a "homemade" cyl in der gas ket. Pipe
seal ant may be lightly coated to cylinder gasket
(18) surfaces prior to in stal la tion, ex cept when
utilized as Item 6 above.
9.
Reinstall the cyl in der (16) con cen tri cally with in
the body cap (5) opening.
10. If supplied with Opt-4 Stabilizer, install new
stabilizer seal (32) properly oriented onto piston
(15). See Figure 4.
11. Slide the piston (15), including sta bi liz er seal
(32) if supplied, slowly into place, as sur ing that
the piston (15) post slides into the female groove
of the pusher plate (11). Use thumbs to ease
stabilizer seal (32) into cyl in der (16).
12. Place piston spring (17) into piston (15) cav i ty.
13. Use pipe thread sealant applied to the body cap
(5) threads. Thread body cap (5) into body (1).
For all sizes of the Ductile Iron and SST body
caps -impact until body cap (5) is metal to metal
against body (1) at the body cap (5) shoulder.
For 3/8" & 1/2" size with bronze body cap -
tighten cap to between 70 - 80 Ft-Lbs torque.
For 3/4" & 1" size with bronze body cap -
tighten cap to between 125-150 Ft-Lbs.
14. Bench test unit for suitable operation. NOTE:
Regulators are not tight shutoff devices. Even if
pressure builds up be yond set point, a regulator
may or may not de velop bubble tight shutoff. In
general, tighter shutoff can be expected with
com po si tion seat.
15. Spray liquid leak detector around body cap (5)
and body (1) for test for leakage. Test pres sure
should be a min i mum of 100 psig (6.9 Barg) at
On regulators origi nally
IOM-D/DL