5
Level Controls - IOM 313 313_IOM_RevC_0418
OVERFLOW TRAP SIZE
FLOAT BALL LEVEL
1
BOTTOM OF FLOAT BALL
BETWEEN 0.0 INCHES ABOVE AND 0.168 INCHES ABOVE
BOTTOM OF VALVE BODY
1-1/2 & 2
BOTTOM OF FLOAT BALL
BETWEEN 0.340 INCHES BELOW AND 0.112 INCHES BELOW
BOTTOM OF VALVE BODY
3
BOTTOM OF FLOAT BALL
BETWEEN 0.050 INCHES BELOW AND 0.118 INCHES ABOVE
BOTTOM OF VALVE BODY
4
BOTTOM OF FLOAT BALL
BETWEEN 0.080 INCHES BELOW AND 0.102 INCHES ABOVE
BOTTOM OF VALVE BODY
6
BOTTOM OF FLOAT BALL
BETWEEN 0.590 INCHES ABOVE AND 0.720 INCHES ABOVE
BOTTOM OF VALVE BODY
1) Remove line pressure and isolate overflow trap. (It is recommended that you have an Inspection Kit on hand
before beginning the procedure.)
2) Remove nuts and bolts from end cover.
3) Remove end cover from float chamber.
4) Remove end cover gasket.
5) Remove capscrews holding valve body to float chamber.
6) Remove internal valve assembly with float ball from float chamber.
7) Install internal valve assembly with float ball in float chamber with float ball extending out of the open end of the
float chamber. Use clamps to secure internal valve assembly with float ball to float chamber.
8) With piston disc seated in valve body and pilot assembly seated on piston disc, measure vertical distance from
bottom of float ball to bottom of valve body.
9) Compare measurement to values in Float Ball Level Table. If measurement is within the range of values in
table complete remaining steps. If measurement is not within range of values in table perform Steps 8 thru 20 of
Float Ball Level Adjustment Procedure, found on page 6.
10) Remove clamps and remove internal valve assembly with float ball from float chamber.
11) Remove valve body gasket.
12) Clean gasket surfaces of end cover, valve body, and float chamber.
13) Install new valve body gasket in float chamber.
14) Install internal valve assembly with float ball in float chamber. Watch orientation.
15) Install capscrews in valve body and tighten to secure valve body to float chamber.
16) Install new end cover gasket on float chamber.
17) Install end cover on float chamber.
18) Install nuts and bolts in end cover and tighten to secure end cover to float chamber.
FLOAT BALL LEVEL TEST PROCEDURE
