DeZURIK
BHP High Performance Butterfly Valves
D10503
Page 26
November 2015
Valve Reassembly
Clean and inspect all parts, and replace worn parts before reassembly. Refer to Figure 1 for
component identification. The valve requires lubrication only when it is being assembled. Refer to the
Actuator Instructions for lubrication requirements for the actuator.
1. Apply a light coat of media compatible grease around the shaft hole on each end of the disc
(area that contacts the disc locating surfaces in the body).
2. With the valve horizontal and the seat side down, insert the disc (A3) into body (A1) and align
the shaft hole in the disc with the bearing in the body.
3. Insert the bottom end of the shaft (the end without an actuator connection) into the top of the
body and push the shaft into position.
4. Rotate the shaft so that the line on the top end of the shaft is towards and parallel with the flat
(or concave) side of the disc.
On valve sizes 2–12" (50–400mm)
a. Slide the shaft so that the top
end of the shaft protrudes
from the body to the
dimension in Table E.
b. Place the disc pin (A5) in the
hole in the disc (A3) as
shown in Figure 14 on page
28 and tap the end of the pin
lightly to seat the pin against
the flat on the shaft (A4). A
new set screw (A24) is
required.
c. Apply Loctite 271 to the set
screw threads.
d. Turn the set screw into the
end of the pin and tighten the set screw as shown in Table F (page 27).
e. As shown in Figure 14 (page 28), stake the end of the set screw threads once with a pointed
punch to secure the set screw in position.
On valve sizes 14" (350mm) and larger,
a. Slide the shaft so that the disc pin slots in the shaft are aligned with the disc pin holes in the
disc.
b. Apply a media compatible rust inhibitor to the threads of the disc pins (A5).
c. Use two new pins and turn the pins into the threaded holes in the disc (A3) and against the
slots in the shaft (A4) as shown in Figure 14 (page 28).
d. Adjust the pins so that both pins protrude the same distance above the disc surface and
tighten the pins as shown in Table F (page 27).
e. As shown in Figure 14 (page 28), stake the screw threads on each disc pin once with a
pointed punch to secure the pins in position.
5. Replace the seat and the seat retainer as described in steps 4, 5 and 6 in the
Seat
Replacement
section on page 20.
Table E: Dimension from Top–of–Body to
Top–of–Shaft
Valve Size
Class 150
Class 300
in
mm
in
mm
in
mm
2–3
25–75
3.75
95
3.75
95
4
100
3.75
95
4.25
105
5 & 6
125&150
4.25
108
4.25
108
8
200
4.25
108
4.63
118
10
250
4.63
118
4.75
120
12
300
4.75
120
4.75
120