DANGER
Ball valve must be depressurized!
Operate the ball valve so that trapped
pressure can escape.
Only adequately qualified and instructed personnel
with adequate personal protective equipment and
tools may execute this task.
Always pay attention to dangerous fluids and
extreme surface temperature.
Use appropriate tools and hoisting gear.
FK 75C Disassembly / Assembly
Total Disassembly
Bring stem (31) into the CLOSED position.
Remove snap ring (22) and stop disc (10).
Unscrew cylindrical hexagon Allen head screws (15).
Dismantle bonnet (11) with wiper ring (41), bearing tape (38), and sealing ring (42), thrust ring (18) with bearing
tape (55) and sealing ring (49).
Unscrew hexagon nuts (20) from body (2).
Remove body (2), O-ring (51) and sealing ring (57) from body (1).
Remove ball (30), ball support pads (13), ball seats (50) with sealing ring (48), thrust ring (53), and
belleville washer (21).
Press stem (31) downward and remove from body (1) with bushing (59) and thrust ring (44).
Remove ring (47), sleeves (85, 86) and disk (45) upwards.
Replacing Stem Sealing
Proceed as for Total Disassembly until.
Replace seal (47) and sleeves (85, 86).
Disk (45) can remain in body (1).
If O-ring sealing is required instead of seal (47), remove sleeves (85, 86).
Disk (45) and thrust ring (18) are then replaced by O-ring sealing (drawings & article number on request).
Additionally, belleville washer (17) and ring (43) are needed.
Inspect all parts for wear and tear or for any sign of improper functioning.
Partial disassembly may be sufficient.
For reassembly, proceed in reverse order of disassembly.
Replace the worn items by original Flowserve spare parts.
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