INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
3-Piece Threaded, Socket, Tube & Clamp End Ball Valves
DOC: IOM_FNW3PCBV_ ver_12-2007
Page 4 of 6
Disassembly
A. Begin with the valve in the open position.
B. Loosen the handle nut (13) and remove.
C. Remove the handle (8).
D. Bend the tab washer (11B) enough so that the gland nut (11) can be loosened. Remove the gland
nut (11).
E. Remove the tab washer (11B).
F. Remove the Bellville washers (12) and packing gland ring (11A).
G. Loosen and remove all body nuts (18), washers (19), and bolts (17).
H. Separate the end caps (3) from the body (1).
I.
Body seals (5) may be retained on the end caps (3) or body (1). Remove them.
J.
Using the handle (8) loose, turn the valve to half open. Reach through the port opening and remove
the seats (4).
K. Turn the valve to the full closed position and remove the ball (2).
L.
Push the stem (6) down into the body (1) and remove it through one of the side body ports.
M. Remove the thrust washer (10) from the stem.
N. Remove the packing (7) from the body’s (1) packing well.
Assembly
A. Place the thrust washer (10) over the top of the stem (6) and slide it down to the bottom.
B. From one of the side body (1) ports, insert the stem, thread end first, into the body, up through the
stem hole.
C. Install packing (7) over the stem (6) and gently work it into the body’s (1) packing well.
D. Install the gland ring (11A) over the stem (6).
E. Install the Bellville washers (12) over the stem (6).
F. Install the tab washer (11B) over the stem (6).
G. Screw the gland nut (11) on to the stem (6). Do not bend the tab washer (11B) up at this time.
H. Add the handle (8) to the stem (6) and loosely secure with the lever nut (13). Make sure the handle is
aligned with its appropriate stops.
I.
Turn the handle (8) to the close position.
J.
Insert one of the seats (4) into the body (1). Make sure the concave portion of the seat faces towards
the center of the body.
K. From the other side of the body (1), carefully slide the ball (2) in so that the footing groove in the ball
engages the foot of the stem (6).
L.
Insert the remaining seat (4) into the end of the body (1), and onto the ball (2).
M. Install the body seals (5) onto the end caps (3) or into the provided recesses on the valve body (1) as
applicable.
N. Insert the body assembly between the two end caps (3) and feed the body bolts (17) through the end
caps and loosely install the body washers (19) and body nuts (18).
O. Ensure that the body assembly is properly centered and that the seats (4) and body seals (5) have
not shifted.
P. Tighten the body nuts (18) and bolts (17) according to the applicable torque chart (Table 1).
Q. Initially tighten the gland nut (11) with a 1/2 to 3/4 turn past hand tight. Bend the tab of the tab
washer (11B) up over the flat of the gland nut and tighten the handle nut (13). If, after testing, there
are stem leaks, follow step 3 above.
R. Test the operation of the valve, checking for binding or misalignment. Always leak test the system
before using.
