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LS200 Series
10. Remove locknut (key 54) on the disk assembly
(key 43) and remove disk.
11. Remove screws (key 34) then remove the orifice
(key 38) and cage (key 35) from the intermediary
flange (key 26).
12. Remove locknut (key 31) using a 30 mm key and
hold the stem (key 37) in place by the hex feature
using a 16 mm key.
13. Remove the balance diaphragm plate (key 30).
14. Remove and replace balance diaphragm (key 28).
Lightly grease the outside and inside of the
balance diaphragm before reassembly.
15. Reassemble the locknut (key 31) using a 30
mm key and hold the stem (key 37) in place by
the hex feature using a 16 mm key at 25.1 ft-lb /
30 N•m torque.
16. Insert stem (key 37) into cage (key 35), make
sure that balance diaphragm (key 28) is mounted
correctly on intermediary flange (key 26)
inner groove.
17. Mount the cage (key 35) on balance diaphragm
(key 28) on indicated position, make sure the
stem hex feature engages with the one on the
cage (upper diameter edge should enter below
intermediary flange top diameter).
18. Assemble screws (key 34) to fix the cage (key 35)
and orifice (key 38) from the intermediary flange
(key 26). Make sure the gap between cage
and intermediary flange is equal on outside
circle diameter.
19. Put the trim back into body (key 1) and assemble
the 4 intermediary flange screws (key 22).
20. Ensure that the serrated washer (key 29) and
O-ring (key 57) are in right position.
21. Assemble main diaphragm (key 4), replace with a
new one if necessary.
22. Reassemble in reverse order parts above main
diaphragm (key 4).
23. During reassembly, ensure that all O-rings
(keys 24, 25, 33, 48, 47 and 57) are in good
condition; replace if necessary. Lubricate with
elastomer sealant and lubricant. Apply anti-seize
compound liberally to the adjusting screw threads
(key 10), as indicated in Figures 5 to 6.
12
Replacing Orifice or Seat
1. Isolate the regulator and bleed downstream
pressure to atmosphere. Once pressure upstream
and downstream have bled to 0, manually trip the
slam-shut to release the spring energy in the trim.
2. Remove closing cap (key 6), rotate the adjusting
screw (key 10) counterclockwise until there is no
compression on the control spring (key 13).
3. If slam-shut is included, remove the slam-shut
mechanism from the body. Remove 4 bolts
(key 224) from the box and pull entire slam-shut
off the body. Careful of the O-ring seal between
the body to avoid damage. Set aside protecting
the cam and sealing surface.
4. Remove the 4 bonnet screws (key 22) and lift
actuator assembly and trim out of the body (key 1).
5. Carefully place the actuator on a surface
protecting the travel indicator (key 21) and the
vent assembly.
6. Remove locknut (key 54) on the disc assembly
(key 43) and remove disk.
7. Remove the two torx screws (key 34) to remove
the orifice (key 38) from the cage (key 35). Keep
the cage connected to the bonnet (key 26). If unit
has a slam-shut option, inspect the slam-shut disc
(key 204) for damage or cuts.
8. Change out the orifice (key 38) with new part
and reassemble.
9. During reassembly, ensure that all O-rings
(keys 32, 40 and 42) are in good condition; replace
if necessary. Lubricate the O-ring with elastomer
sealant and lubricant. Apply anti-seize compound
liberally to the adjusting screw threads (key 10), as
indicated in Figures 5 to 6.
Parts Ordering
When corresponding with your local Sales Office about
this regulator, include the type number, serial number
and other information stamped on the nameplate.
When ordering replacement parts, reference the key
number of each needed part and specify the eleven
character part number as found in the following
parts list.
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