4
4.2 Inspection
▪
Ball [Fig.4.9]
Measure the outside diameter, and if it is outside the
usable range, replace the ball.
Usable range of Ball
NDP-20 S
Ø
24.3 ~ S
Ø
27.8 mm
NDP-25
NDP-32
S
Ø
31.5 ~ S
Ø
36.1 mm
▪
Valve seat [Fig.4.10]
Measure the dimension shown at left, and if it is outside
the usable range, replace the valve seat.
Usable range of Valve seat
BA
□
, BS
□
, BF
□
BP
□
, BV
□
NDP-20
3.4 ~ 8.5 mm
3.3 ~ 8.1 mm
NDP-25
NDP-32
3.8 ~ 9.5 mm
3.4 ~ 9.5 mm
▪
O ring (other than PTFE)
If O rings are worn out or cracked, replace them.
4.3 Installation
For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly.
Tightening torque for manifold retainer bolts
C, N, E, V, H, S
T
BA
□
BS
□
10 N•m
20 N•m
NDP-20
BA
□
-D
10 N•m
15 N•m
BA
□
BS
□
NDP-25
NDP-32
BF
□
10 N•m
35 N•m
Tightening torque for manifold retainer nuts
C, N, E, V, H, S
T
NDP-20
BP
□
BP
□
NDP-25
BV
□
10 N•m
12 N•m
▪
NDP-20B
□
H/T, NDP-25B
□
H/T type be with 10N•m tightening.
<NOTE>
▪
Make sure there is no dust on the seal surface and the
seal is not damaged.
▪
Replace the PTFE O ring regardless of its condition.
▪
Apply Lubricant
(equivalent to LOCTITE ANTI-SEIZE
767) to tie-rod thread. (BP
□
, BV
□
type)
