cashco DL Installation, Operation & Maintenance Manual - Page 4
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button (4) where adjusting screw (6) bears. Set
spring button onto top of range spring; ensure
spring button is laying flat.
11. Aligning the matchmarks, place spring cham ber
(2) over the above stacked parts. Install all bolts
(8), washers (26), and lock washers (25), by
hand. Mechanically tighten bolting in a cross
pattern that allows spring cham ber to be pulled
down evenly. Rec om mended torque values are
as follows:
NOTE: Never replace bolting (8) with just any bolting
if lost. Bolt heads are marked with specification
Regulator
Model
Size
3/8" thru 1"
D
(DN10 thru 25)
1-1/2" thru 2"
DL
(DN40 thru DN50)
identification mark ings. Use only proper grades as
replacements.
12. Reinstall adjusting screw (6) with jam nut (7).
13. Test for external leakage by spraying liquid
leak detector around bolting (8) and body (1)
and spring chamber (2) flang es. 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 flange down wards.
NOTE: Do not secure by the adjusting screw (6)
or jam nut (7).
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 the
pusher plate cannot be removed from this
position. 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 is removed from body
(1). Re move stabilizer seal, 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.
6.
Clean debris from within body (1) cavity. Clean
parts to be reused.
4
Bolt
Metal & Comp.
Size
Diaphragm
20-24 Ft-Lbs
5/16"-24
(27-32 N-m)
50-54 Ft-Lbs
1/2"-20
(67-73 N-m)
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.
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 1.
11. Slide the piston (15), including sta bi liz er seal
(32) if supplied, slowly into place, as sur ing that
the piston post slides into the female groove
of the pusher plate (11). Use thumbs to ease
stabilizer seal 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 into body (1)
as tight as possible by hand, then tighten to the
following torque values.
For 3/8" & 1/2" size body cap - tighten cap to
between 70 - 80 Ft-Lbs torque.
For 3/4" & 1" size 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
the inlet. Outlet should be tested to upper value
of range spring (14).
NOTE: Comp seats are not removable from
piston (15) assemblies. If composition seat is
dam aged, re place entire pis ton assembly.
On regulators origi nally
IOM-D/DL