Emerson Fisher S202 - Valve Disk and Orifice Replacement

S201 and S202 Series
6
Parts List
Key Description Part Number
Spare Parts (Repair Parts Kit includes
keys 5, 7, 16, and 19)
Types S201, S202 RS201X00012
Types S201H, S202H RS201HX0012
Type S201K RS201KX0012
1 Spring Case
Aluminum 4L142308032
Pinned for heavy spring 1J718699022
2 Spring, Steel See Table 3
3 Adjusting Screw
Aluminum (Types S201, S201H, S202, S202H) 1L928608012
Steel (Type S201K) 1R8085T0012
4 Closing Cap
Aluminum (Types S201, S201H, S202, S202H) 1L928308012
Brass (Type S201K) 1H798714012
5* Closing Cap Gasket, Neoprene (CR) 1N446206992
6 Upper/Lower Spring Seat
Aluminum (Types S201, S201H, S202, S202H) 1L928708012
Brass, Type S201K (2 required) 1H797414012
7* Diaphragm and Diaphragm Head
Types S201, S202 - Use with
1D8933 and lighter springs 1L1544X0012
Types S201H and S202H - Use
with 1H9758 and heavier springs 1L1545X0012
Type S201K (Diaphragm only) 1K649602052
8 Pusher Post, Aluminum
Types S201, S201H, S201K 2H980608012
Types S202, S202H 2H975208012
9 Lower Casing Assembly, Aluminum/Stainless steel 1H9751X0012
10 Lever, Steel 1H974028992
11 Pin, 303 Stainless steel 1H972935032
12 Machine Screw, Steel (2 required) 1B420428982
13 Valve Stem Assembly 1H9748000A2
14 Cap Screw, Steel (12 required) 1B136324052
15 Hex Nut, Plated steel (12 required) 1A309324122
16* Disk Holder Assembly
For Natural Gas Service 1P7349000A2
For Manufactured Gas
(3/4-inch (19 mm) larger orices) 1J1680X0012
17 Diaphragm Plate, Steel (Type S201K) 1A347825022
18 Cap Screw, Plated steel (2 required) 1H974724052
19* O-ring, Nitrile (NBR) T12587T0012
20 Orice, Aluminum
1/4-inch (6,3 mm) T13833T0012
3/8-inch (9,5 mm) 1H979309022
1/2-inch (13 mm) 1H979409022
3/4-inch (19 mm) 1H979509022
1-inch (25 mm) 1H979609022
1-3/16-inch (30 mm) 1H979709022
*Recommended spare part.
Note
Take care not to pinch or tear the
diaphragm when reassembling.
6. Reassemble the spring case unit in the reverse
order of the above steps. Before tightening the
cap screw or stem into the pusher post, place
the loosely-assembled diaphragm and diaphragm
head assembly into position in the lower casing,
being sure that the pusher post is hooked on
the lever. Rotate the diaphragm so that the
diaphragm and lower casing holes are aligned.
Tighten the screw or stem.
CAUTION
Before tightening cap screws (key 14),
replace the spring and adjusting screw.
Turn the adjusting screw to about
mid position. This will stretch the
oversized diaphragm to ensure slack in
the assembled diaphragm. The slack
created by this method is necessary
for good regulation. Be sure the
diaphragm does not fold over at the
ange when reassembling.
Disassembly to Replace Valve Disk,
Orice, and O-Rings
1. Remove the cap screws (key 18, Figure 5) which
hold the lower spring casing (key 9) to the body
(key 21). Separate the lower spring casing from
the body.
2. Check the body O-ring (key 19) for wear.
3. Examine the valve disk (key 16) for nicks, cuts,
and other damage. Unscrew the disk holder
assembly (key 16) and replace it with a new part
if necessary.
4. If the seating edge of the orice (key 20)
is nicked or rough, remove the orice from
the body. Change to a new part when
reassembling the regulator. (If the orice is
replaced with a different size, change
the nameplate to state the new size and
maximum inlet pressure).
5. Reassemble the regulator in reverse order of the
above steps.
Parts Ordering
The type number, orice size, spring range, and
date of manufacture are stamped on the nameplate.
Always provide this information in any correspondence
with your local Sales Ofce regarding replacement
parts or technical assistance.
When ordering replacement parts, reference the key
number of each needed part as found in the following
parts list. Separate kit containing all recommended
spare parts is available.