Flowserve Argus Ball Valves - Manual (Page 18)

Argus
Maintenance
18
Type HK/35
HK35-02-001
Danger!
Do not disassemble the valve under pressure. Before disassembly operate valve so that possible
pressure behind the ball may escape.
Disassembly
f Stem (22) should be in CLOSED position.
f Remove snap ring (12), stop ring (7), snap ring (18) and washer (19).
f Unscrew cheese-head screws (8).
f Take off plate (6) with sealing ring (43), bearing tape (34) and dowel pin (9) as well as thrust ring (11)
with sealing ring (35). ∗∗
f Press stem (22) downwards completely.
f Unscrew hexagonal nuts (4) from body (2).
f Take off body (2), O-ring (37) and sealing ring (33) from body (1).
f Take ball (21) with shaft (22), counter-bearing (14), wearing ring (17) and bearing tape (15) out of body.
f Take out ring (16), bush (38), O-ring (32) and washer (39).
f Remove Belleville spring washer (53), rings (44), sealing rings (45), bearing rings (31) and sealing rings
(30) with O-rings (48) from body (1) and body (2).
Exchanging the Stem Sealing
Proceed as per Disassembly until (∗∗) .
f Exchange items (32) and (39).
When using a PTFE seal instead of O-ring (32), item (39) can be left out.
Depending on the actual requirements, a partial disassembly of the ball valve might be sufficient.
Reassembly
f Place Belleville spring washers (53), rings (44), sealing rings (45), bearing rings (31) and sealing rings
(30) with O-rings (48) in body (1) and body (2).
f Install bush (38).
f Insert stem (22) in ball (21) from below and then insert them with counter-bearing (14), bearing ring
(15), wearing ring (17) and ring (16) in body (1).
f Place ball (21) in OPEN position and press it against the Belleville spring washers until stem (22) can
be pulled upwards into the body.
f Pay attention to the marks on stem (22) and ball (21).
f To continue reassembly, proceed in reverse order as described in disassembly..