Flowserve Argus Ball Valves - Manual (Page 16)

Argus
Maintenance
16
Type FK/79/F
TYP / TYPE / TYPE FK/79/F
FK79-02-002
Danger!
Do not disassemble the valve under pressure. Before disassembly operate valve so that possible
pressure behind the ball may escape.
Disassembly
f Stem (31) should be in CLOSED position.
f Remove snap ring (22) and stop ring (10).
f Unscrew cheese-head screws (15).
f Take off plate (11) with dowel pin (7), sealing ring (42), bearing tape (55), on DN 80 and 100 with wiper
ring (41) as well as thrust ring (18) with sealing ring (49). ∗∗
f Unscrew hexagon nuts (19).
f Take off body (2), O-ring (51) and sealing ring (57) from body (1), remove ball (30) and sealing
rings (50).
f Press stem (31) downwards and take it out of the body together with bush (59) and washer (44).
f Remove the seal (47) upwards.
Exchanging the Stem Sealing
Proceed as per Disassembly until (∗∗) .
f Replace seal (47).
Depending on the requirements, a partial disassembly of the ball valve may be sufficient.
f To reassemble, proceed in reverse order.