16
Reassembly
Reassemble the unit using the same procedure as used for disassembling it; but in
reverse order. In addition, observe the following precautions:
1. The PTFE gasket may be re-used if free from fault, crushing or deformation.
2. Apply anti-seize to the steel ball and threaded portions of screws, bolts and the
adjustment handle. Apply a small amount of anti-seize agent to the threads of
the valve seat carefully to ensure it does not come into contact with other parts.
3. Fasten the bolts one at a time in a diagonal pattern alternately to provide
uniform seating.
4. After assembly, make sure that the valve stem operates smoothly without
binding.
As shown in the figures above, when the valve is tightened it may become off-
centered on the valve seat. If this occurs, move the valve back to center.
Valve Seating Surface
5. Standard torque for fastening the respective screws and the width across flats of
the tools to be used are as follows:
Torque
Distance Across Flats
Part
N
⋅
m
(lbf·ft)
mm
(in)
Cover
Bolt
25 19 13 (
1
/
2
)
Valve
Seat
70 (51) 27 (1
1
/
16
)
Holder
Nut
10 (7) 30
(1
3
/
16
)
(1 N
⋅
m
≈
10 kg
⋅
cm)
NOTE: - If drawings or other special documentation were supplied for the product,
any torque given there takes precedence over values shown here.
172-65119MA-01 (PN-DR) 13 Jun 2013