Instructions EF35002 - 08/10
Camflex
®
II 35002 Series Control Valves
8.3.2 DVD Removal (Refer to Figure 16)
In case of Camflex
®
with the DVD option, model number
35x3x or 35x4x, the DVD is installed in the body, it is
recommended to use the DVD wrenches to remove this
device (105). Masoneilan manufactures and has available,
for a nominal price, DVD wrenches for the Camflex
®
II, 1"
through 12" sizes (DN 25 through 300 sizes). lt is highly
recommended that wrenches be purchased or fabricated
to facilitate removal and reassembly of the DVD (105) since
SPECIFIC TORQUES MUST BE ACHIEVED to ensure
proper clamping of this DVD plate.
Figure 6 shows the recommended thickness and
method of construction along with specific dimensions
to facilitate construction.
A
H
T
Ød
ØD
Valve
Size
A
inches
(mm)
d
inches
(mm)
D
inches
(mm)
H
inches
(mm)
T
inches
(mm)
1"
(DN 25)
1.063
(27)
0.142
(3.6)
1.236
(31.4)
0.079
(2)
0.4
(10)
1
1
⁄
2
"
(DN 40)
1.496
(38)
0.157
(4)
1.772
(45)
0.118
(3)
2"
(DN 50)
1.929
(49)
0.157
(4)
2.205
(56)
0.118
(3)
0.7
(18)
3"
(DN 80)
2.913
(74)
0.177
(4.5)
3.248
(82.5)
0.157
(4)
0.8
(20)
4"
(DN 100)
3.858
(98)
0.197
(5)
4.213
(107)
0.275
(7)
0.8
(20)
6"
(DN 150)
5.905
(150)
0.236
(6)
6.260
(159)
0.354
(9)
1.0
(25)
8"
(DN 200)
7.913
(201)
0.236
(6)
8.268
(210)
0.394
(10)
1.0
(25)
10"
(DN 250)
9.843
(250)
0.236
(6)
10.315
(262)
0.394
(10)
1.2
(30)
12"
(DN 300)
11.732
(298)
0.276
(7)
12.204
(310)
0.472
(12)
1.2
(30)
6
0.5
(12)
Figure 6
A.
Secure the valve body in a vise or appropriate holding
device with the plug side facing up (refer to Figure 16).
CAUTION
CAUTION
WARNING
DANGER
Care must be taken to avoid damage to the gasket
face on the valve body.
B.
Place DVD plate wrench so it engages retainer lugs.
C.
Engage the retainer wrench with an impact wrench or
suitable wrench and loosen, then remove DVD (105)
by turning counter-clockwise.
9. Maintenance
9.1 Diaphragm Replacement
(Refer to Figures 16 and 17)
The recommended maintenance to be performed on the
Camflex
®
II Spring Diaphragm Actuator is limited to the
replacement of the diaphragm (40). Removal of the actuator
from the valve is not required. To replace the diaphragm,
proceed as follows:
CAUTION
CAUTION
WARNING
DANGER
The valve must be isolated and free from any service pressure.
All electrical or air pressure to component parts must be off.
Pressure to actuator must be relieved.
Handwheel (53) and limit stop (77) must be backed off to
allow free travel of the lever (34).
A.
Bypass the valve, shut off stop valves and isolate valve in
compliance with CAUTION note listed above.
B.
Shut off and disconnect air supply tubing to the actuator.
C.
Remove the four capscrews (41) from diaphragm case
(42) and remove diaphragm case.
D.
Remove diaphragm (40).
Note: Diaphragm is glued to the top of the piston (43).
E.
Remove tape or glue from the top of the piston and
clean thoroughly.
F.
Clean diaphragm case (42) and spring barrel (38) at the
area that engages the diaphragm bead in preparation for
reassembly.
Note: To hold the diaphragm in place on the piston, an
adhesive disc (adhesive both sides) or rubber cement
is used. If rubber cement is used, it should be applied
to both the piston and the diaphragm or in accordance
with the manufacturer’s directions for the adhesive
used. For recommended adhesives see Figure 15.
G.
Apply adhesive tape or cement to the top of the piston.
H.
The inscription “Piston Side” is located on the diaphragm
(40). If used, apply cement to this side of the diaphragm.
I.
Center and adhere diaphragm (40) to the top of the piston
(43) (see Figure 7, Step A).
J.
Roll the diaphragm (40) inside the spring barrel (38) until
the bead on the diaphragm is located in the spring barrel
groove (see Figure 7, Step B).
7
