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Re-Assembly
A. Stem
1. Replace thrust washer (7) and O-ring (8) then insert the stem
from inside of body.
2. Install stem packing (3), gland (6), spring washers (4), stem nut
(14), and lockwasher (17) and tighten until snug, then one-half
turn. To avoid rotation of stem, insert the handle and ball.
3. Install handle (1) and handle nut (2) then tighten.
B. Ball, Seats and Seals
1. Place the stem (5) in closed position and insert the ball (9),
aligning groove in ball with bottom of stem.
2. Position the ball in the open position then insert a seat (10),
body seal (11), second body seal (18), and end cap (13) on
each side of body.
3. Hand tighten all bolts.
4. Tighten bolts to recommended torque values using an alter-
nating/opposing pattern with no more than 1/4 turn on each
bolt before alternating.
Testing
1. After completing the reassembly, check that the valve operates
smoothly by opening and closing valve several times.
2. If entire valve was removed from line and if facilities are avail-
able, test the ball valve to appropriate specifications.
Troubleshooting
A. Stem Leakage
1. Leakage in the stem packing area may be eliminated by in-
creasing the torque on the stem nut (14) in one-quarter turn
increments. If leakage persists, replace stem packing (3).
B. Body Seal Leakage
1. Check the torque of the body bolts (11) according to Torque
Table. Replace body seals (11 & 18) if leakage persists.
C. In Line or Seats Leakage
1. Check to be sure valve is in fully closed position. If leakage
persists, the valve must be disassembled and damaged parts
replaced.
1. The surface of the ball should be free from any defect. If any
are found, the ball should be replaced. Using a defective ball
will be extremely detrimental to valve performance.
2. Seats. Replacement of seats is recommended.
3. Stem seals and body seals. Should be discarded and re-
placed.
4. Remaining components of the valves. After cleaning, carefully
examine for wear, corrosion, and mechanical damage. Re-
place all defective parts.
5. Clean inside of body and stem housing. Light grease, compat-
ible with line fluid, can be used on ball, seals and stem surfaces.
NOTE: A spare parts list is available for this valve. Please
refer to explosion view below for identification. Please
specify specific valve number to ensure proper parts
are ordered. Marwin Valve does not take reponsibility
for incorrectly ordered spare parts.
tiKstraPerapS
#metIytitnauQemaNtraP
32 gniRgnikcaP
72 rehsaWtsurhT
81 metSgniR"O"
012 staeS
112 steksaGydoBtsriF
812 steksaGydoB
dnoceS
Bolt Torque Value Table
eziS/seireS noitamrofnItloB lairetaMgnitloB
seireS0007/0003eziStloBytitnauQtloBleetSDBECANM7BLTStS8B
R"2/1-"4/1 5213.0 4 02 01 8
F"2/1-R"4/35213.0402018
F"4/3-R"1 573.0 4 52 12 41
F"1-R"4/1-1573.04330332
F"4/1-1-R"2/1-1 5.0 4 45 24 33
F"2/1-1-R"25.04062574
F"2-R"2/1-2 5.0 6 45 24 33
F"2/1-2-R"35.09452433
F"3-R"4 5.0 8 45 24 33