Flowserve BX2001 Durco - Manual (Page 12)

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13
12
SECTION IV
SEAT REPLACEMENT (continued)
SEAt pAckAgE InStALLAtIon – trIFLEx cLASS vI MEtAL
SEAtED vALvE
1. Make certain the valve disc is fully closed and place
the seat into the valve body with the rolled seal on the
outside of the seat facing up, away from the valve body
seat pocket.
2. For valves that use retainer ring fasteners, place the
retainer ring on the valve body and line up the fastener
holes. Using a press or “C” clamps, firmly press the
retainer ring onto the valve body to compress the seat
package. Insert and tighten the fasteners in a criss-cross
pattern to 180 in-lbs (20 Nm).
3. For valves that use a wire retainer locking ring, place the
retainer ring into the valve body seat pocket. Thread the
wire through the slot in the valve body and rotate the
retainer ring to pull the wire through the valve body until
both ends of the wire extend through the slot. Bend each
end of the wire back to lock the wire in place. Trim off
extra wire length and tack weld each to the valve body.
FInAL prEpArAtIon For InStALLAtIon – SEAt
rEpLAcEMEnt rEpAIr
1. Stem packing fasteners should be re-tightened to the
torque specifications listed on page 25 of this manual.
Make certain to identify the style of packing used in
the valve in order to select the proper fastener torque.
Packing styles are illustrated on page 25 of this manual.
2. If manual operators were removed, re-install them using
the procedures in Section VIII for gears or Section X
for levers.
3. Operate the valves a few times to insure that the valve
disc turns freely into and out of the seat. Seat testing or
repaired valves is recommended.
Retainer Ring
Retainer Ring
Locking Wire
Triflex Class VI
Metal Seat
Retainer Ring
Retainer Ring
Fastener
Triflex Class VI
Metal Seat
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