Dover OPW Midland A-522-C2-CS-SJ-SU-ST Installation instructions

P/N: A-522-C2-XX-SJ-SU, Rev. 0
Issue Date: August 6, 2020
Page 1 of 5
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Sulfur Bottom Outlet Valve Disassembly Instructions
1Preparation
These instructions are specific to the disassembly of A-522-C2-CS-SJ-SU-ST, A-522-C2-MO-SJ-SU-ST, A-522-C2-MO-
SJ-SU-TF and A-522-C2-MO-SJ-SU-SMBC-ST Bottom Outlet Valve models. For more extensive maintenance
instructions, please refer to Midland’s Installation, Operation and Maintenance Instructions for A-520/522 ball valves.
•Exercise normal safety precautions for the commodity involved
•Discard all soft parts being replaced
•Inspect and clean all parts thoroughly per Midland’s Installation, Operation and Maintenance Instructions for A-
520/522
2Valve Details
Figure 2-1 Component Identifications

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P/N: A-522-C2-XX-SJ-SU, Rev. 0
Issue Date: August 6, 2020
Page 2 of 5
ITEM
QTY
PART NAME
A-522-C2-CS-SJ-SU
A-522-C2-MO-SJ-SU
PART NO.
MATERIAL
PART NO.
MATERIAL
1
1
CAP ASSEMBLY
SEE TABLE
SEE TABLE
SEE TABLE
SEE TABLE
2
1
STEM
520-2-SS
STAINLESS
520-2-SS
STAINLESS
3
1
BALL
520-30-MO
STAINLESS
520-30-MO
STAINLESS
4
1
BODY ASSEMBLY
SEE TABLE
SEE TABLE
SEE TABLE
SEE TABLE
5
1
PACKING
520-5-01-TF
TEFLON
520-5-01-TF
TEFLON
6
1
SPACER
520-6-SS
STAINLESS
52D-6-SS
STAINLESS
7
1
PIN
520-7-CS
STEEL
520-7-CS
STEEL
8
1
STOP PLATE
520-8-CS
STEEL PLATED
520-8-CS
STEEL PLATED
9
8
CAPSCREW, HEX-SOC, 5/8"-11UNC-2A X 1"
LG
520-9-CS
STEEL
520-9-CS
STEEL
10
11
1
SEAL, VALVE BODY
520-11-01-TF
TEFLON
520-11 -01 -TF
TEFLON
12
1
WASHER, THRUST
520-12-01-TF
TEFLON
520-12-01-TF
TEFLON
13
1
LOCKNUT, HEX, THIN, 1 1/ 8"- 12UNF,
NYLON INSERT
520-13-CS
STEEL PLATED
520-13-CS
STEEL PLATED
14
1
NAMEPLATE
522-13-88-SS
STAINLESS
522-13-86-SS
STAINLESS
15
1
HANDLE (*)
520-15-CS
STEEL
52D-15-CS
STEEL
16
1
WASHER, HANDLE (*)
520-16-CS
STEEL
520-16-CS
STEEL
17
1
BOLT, HANDLE (*)
520-17-CS
STEEL
520-17-CS
STEEL
18
19
20
(*) ITEMS 15, 16, 17 NOT SHOWN, ARE OPTIONAL
Figure 2-2 Component Parts Listing
VALVE MODEL NO.
CAP ASSEMBLY
BODY ASSEMBLY
PART NO.
MATERIAL
PART NO.
MATERIAL
SEAL MATERIAL
A-522-C2-CS-SJ-SU-ST
522-100-CSST
CARBON STEEL
522-430-CSST
CARBON STEEL
50% 316SS FILLED PTFE
& VA
A-522-C2-CS-SJ-SU-TF
522-100-CSTF
CARBON STEEL
522-430-CSTF
CARBON STEEL
PTFE & VA
A-522-C2-MO-SJ-SU-ST
522-100-MOST
STAINLESS STEEL
522-430-MOST
STAINLESS STEEL
50% 316SS FILLED PTFE
& VA
A-522-C2-MO-SJ-SU-TF
522-100-MOTF
STAINLESS STEEL
522-430-MOTF
STAINLESS STEEL
PTFE & VA
Figure 2-3 Cap, Body and Ball Seal Parts Listing

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3Reassembly Procedure
Refer to Valve Details for valve component identification during the repair kit reassembly process.
Set the valve to the closed position. This must be done to allow removal of the
valve ball.
Figure 3-1 Set to Closed Position
Locate the valve on a bench (preferably on a pressure-test fixture) so it may be
bolted for safety and rigidity during hardware removal. Secure it with the eight-
bolt flange.
Figure 3-2 Valve Inverted
Remove the outlet cap assembly (if present).
Remove tack welds from retaining ring holding ball seal (Item 10) in place in cap (item 1). Tack weld locations
noted in Figure 3-3.
Figure 3-3 Tack Weld Positions

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P/N: A-522-C2-XX-SJ-SU, Rev. 0
Issue Date: August 6, 2020
Page 4 of 5
Remove retaining ring (Part Number 522-18-MOL in Figure 3-3).
Reach both hands into the valve body (item 4) on either side of the valve ball
(item 3). Lift the ball out of the body and set it on a padded surface.
Figure 3-4 Remove Valve Ball
Remove the locknut (Item 13) from the valve stem (item 2) by turning it
counterclockwise.
Figure 3-5 Remove Locknut
Remove the stop plate (item 8) and then
carefully press the valve stem (item 2) into the
body (item 4) cavity and remove it.
Figure 3-6 Remove Stop Plate and Stem
Remove the stainless-steel spacer collar (Item 6) from the valve-stem bore.
Figure 3-7 Remove Spacer Collar
TIP: Use a 1-1/8” wrench.
TIP: The use of a brass or plastic
hammer may be required to overcome
the resistance of the compressed
stem packing.

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P/N: A-522-C2-XX-SJ-SU, Rev. 0
Issue Date: August 6, 2020
Page 5 of 5
Remove the Teflon®packing (item 5) from the valve-stem bore. Avoid
scratching or gouging the interior surfaces of the valve-stem bore.
Figure 3-8 Remove Teflon®Packing
Remove ball seals (Item 10) and O-rings from body (Item 4).
Clean sealing surface for ball seals (Item 10) in both body (Item 4) and cap (Item 1).
Sealing surface should be clean and free of any imperfections per component inspections in 4.2 of A-520/522
IOM.
Wipe down one of the ball seals (Item 10) and then place it into the bottom seat
of the body valve (Item 4), flat side downwards. Be very careful to avoid
damaging the seat during installation.
Figure 3-9 Install Ball Seal
Install retaining ring (Part Number 522-18-MOL in Figure 3-3).
Clamp retaining ring and seals to Body and Cap and tack weld retaining ring in 6 places. See 522-100-INSTR
for reference.
TIP: For valve assemblies using SS/TF seats, apply a thin layer of grease
(such as Panef Petrolatum) to the chafer portion of the seat (Item 10).