Instructions EF35002 - 08/10
Camflex
®
II 35002 Series Control Valves
CAUTION
CAUTION
WARNING
DANGER
When using heating devices, ensure that proper safety
practices are observed. Such items as the flammability
and toxicity of the controlled substance must be
considered and proper precautions taken.
If the shaft is not removed easily, replace the lever (34)
on the splined end of the shaft (19), tighten the lever
capscrew (49) and using a mallet, tap the lever (34) as
close to the shaft as possible and remove the shaft (19).
Note: If the shaft cannot be removed by tapping the
tightened lever, Figure 20 illustrates an alternative method
of removal. Using a pipe nipple of suitable size and length
and reversing the packing flange and stud nuts as shown,
the shaft may be jacked out of the body. For larger valves,
the use of an additional washer and nipple to assist in
holding the tightened lever is recommended. The lever
should be tightened at a point where the hub on the lever
is flush with the end of the spline.
E.
The components which should come out with the shaft
(19) are: the packing (17), packing box ring (23 or 100),
spacer tube (20) and upper guide bushing (21).
Note: The spacer tube (20) and upper guide bushing
(21) may remain in the body. They should be removed.
The spacer tube (20) can only be removed by pulling
it out the bonnet end of the body. The upper guide
bushing (21) may be pushed through the body after
removing the plug or pulled through the bonnet end
of the body. On valves designed for use on slurry or
viscous service, the upper guide bushing has an inner
“O” ring (92) and an outer “O” ring (93) and the lower
guide bushing has inner “O” ring (95) and outer “O” ring
(96) (Refer to Figure 4).
92
93
21
22
96
95
Figure 4 - Optional “O” ring arrangement
F.
Remove the plug (4) through the end of the body
opposite the seat ring.
G.
Remove the lower guide bushing (22).
Note: A groove is provided in the bushing for prying
out the bushing using a screwdriver. If the bushing
will be pried out it should be pried from two sides to
prevent jamming the bushing during removal. If the
bushing does not come out easily, fill the bushing with
grease, insert the shaft (19) into the valve insuring that
the machined portion of the shaft starts into the lower
guide bushing. Using a soft faced mallet, strike the
end of the shaft lightly until the bushing is pushed out
partially. Remove the shaft and complete removal of
the bushing by prying out using the groove provided.
CAUTION
CAUTION
WARNING
DANGER
Do not pry the bushing using the seat for leverage. If the
bushing cannot be easily removed, proceed to section
8.3.1 and remove the seat ring retainer and seat ring then
remove the bushing. Place a piece of soft stock (brass,
etc.) between the inner seat shoulder and prying device to
prevent damage to the seat sealing area of the body.
8.3.1 Seat Ring Removal (Refer to Figure 16)
The following procedures outline the recommended
method for removing the seat ring retainer (3) with the
use of retainer wrenches. Masoneilan manufactures
and has available, for a nominal price, seat ring retainer
wrenches for the Camflex
®
II, 1" through 4" (DN 25
through 100) sizes. It is highly recommended that
wrenches be purchased or fabricated to facilitate removal
and reassembly of the seat ring (2) since SPECIFIC
TORQUES MUST BE ACHIEVED to obtain tight shutoff
and ensure proper functioning of the valve.
Figure 5 shows the recommended materials, thickness
and method of construction along with specific
dimensions to facilitate construction.
A
A
B
WELDED
KEY
STOCK
3/16" STEEL PLATE
A = O.D. Seat Ring Retainer
B = Width of slot in Retainer
C = I.D. of Seat Ring Retainer
WELDED
HEX NUT
C
Figure 5
A.
Secure the valve body in a vise or appropriate holding
device with the seat ring facing up.
CAUTION
CAUTION
WARNING
DANGER
Care must be taken to avoid damage to the gasket
face on the valve body.
B.
Place retainer wrench so it engages retainer lugs.
C.
Engage the retainer wrench with an impact wrench or
suitable wrench and loosen, then remove retainer (3)
by turning counterclockwise.
D.
Lift out seat ring.
Note: In an emergency, drifts may be used to remove
the seat ring retainer. However, two drifts should be
used and placed in the slots 180° apart and struck
simultaneously.
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