Marwin Valve 2000F150 Series Flanged Valves - Manual (Page 3)

Re-Assembly
A. Stem
Place grey bearing washer (11) then white thrust 1.
washer (12) on stem.
Insert stem (4) with bearing and thrust washer on it 2.
from inside of body (1).
Sizes 1/2" and 1": 3.
a. Install stem packing (13), grey bearing washer
(11), packing follower (15), Belleville spring wash-
ers (16) (concave sides facing each other), lock
saddle (19), and packing nut (20). Tighten pack-
ing nut until snug, then one-half turn. The handle
may be used to prevent rotation of the stem while
tightening the stem nut.
b. Bend tab of lock saddle (19) up against the flat
of the packing nut.
c. Install handle (12), lock washer (24) and handle
nut (25).
For sizes 1-1/2" through 6" 4.
a. Install stem packing (13), grey bearing washer
(11), packing follower (15), Belleville spring wash-
ers (16) (concave sides facing each other), stop
plate (18), lock saddle (19), and packing nut (20).
Tighten packing nut until snug, then one-half turn.
The handle may be used to prevent rotation of the
stem while tightening the stem nut.
b. Bend tab of lock saddle (19) down against the
flat of the packing nut.
c. Install handle adaptor (24), and handle (25), and
tighten handle bolts (26).
B. Ball, Seats and Seals
Install a seat (5) in body (1). 1.
Place the stem (4) in the closed position and insert 2.
the ball (3), aligning groove in ball with bottom of
stem.
Position the ball in the open position. 3.
Install a seat (5) and body seal (6) on end plug (2). 4.
Insert end cap (2) in body (1). 5.
Install and hand tighten all bolts (7) through end 6.
cap flange (2) into body (1).
Torque bolts or nuts to recommended values in an 7.
alternating / opposing pattern no more than one-
quarter turn before alternating.
Testing
After completing the reassembly, check that valve 1.
operates smoothly by opening and closing valve
several times.
If entire valve was removed from line and if facili- 2.
ties area available, test the ball valve to appropri-
ate specifications.
Troubleshooting
A. Stem Leakage
Leakage in the stem packing area may be eliminat- 1.
ed by increasing the torque on the stem nut (14)
in one-quarter turn increments. If leakage persists,
replace stem packing (9).
B. Body Seal Leakage
Check the torque of the body bolts (7) according 1.
to Torque Table. Replace body seal (6) if leakage
persists.
C. In Line or Seats Leakage
Check to be sure valve is in fully closed position. If 1.
leakage persists, the valve must be disassembled
and damaged parts replaced.
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Body Bolt Torque Value Table
Valve Size
Body Bolt Torque (in/lbs)
Class 150 Class 300
1/2" 150 —
3/4" 150 —
1" 150 —
1-1/2" 150 580
2" 300 580
2-1/2" 300 580
3" 500 580
4" 840 580
6" 1620 —