Cashco C-BPV - Manual (Page 5)

IOM-C-BPV 5
10C. For Sizes 3/4"- 1-1/2 w/65-125 psig range
spring:
Clamp the plug (18) at the fl ats on the plug in
a smooth jawed vice.
a. Remove set screw (26).
b. Rotate guide post (22) assembly CCW
and remove from adapter (31).
c. Place a wrench on the fl ats of the adapter
(31) and rotate CCW to remove from plug
(18).
d. Remove pressure plate (3), diaphragm
(14) and diaphragm spacer (38). NOTE:
Correct orientation of spacer (38) has
the side with the I.D. radius towards the
clamping surface of the plug.
e. Reinstall diaphragm spacer (38) on plug
(18). Place new diaphragm (14) with
convolution side facing up, onto plug (18)
and fi t it around the diaphragm spacer
(38).
f. Lay pressure plate (3) on top of diaphragm
(14).
g. Apply Loctite 242 or equivelant to the long
threaded end on the adapter (31) and
secure adapter (31) to plug (18) Tighten
to 60 in-lbs of torque.
h. Secure guide post assembly (22) to
threaded end of adapter (31) hand tight.
Adjust fi nal rotation to ensure that the set
screw (26) will lock fi rmly against one of
the surface fl ats on the adapter (31).
i. Apply Loctite 242 or equivelant to threads
of set screw (26) and thread tight into
guide post.
j. Replace plug/guide post assembly of parts
back into body (1). Align tab on diaphragm
with the tab slot cut in the body fl ange lip.
k. Place spring (7) over guide post (22).
l. Return spring button(4) with adjusting
screw assembly (5) and bearing (23) down
over guide post (22) onto spring (7). Align
one tab (ear) on spring button (4) directly
above tab slot in the body fl ange lip.
m. Align the two ribs inside the spring cham-
ber (2) with the tabs on the spring button
(4) and place the spring chamber (2) over
assembled parts directly on body (1).
n. Position the clamp (13) halves around
the mating fl anges of the body (1) and
the spring chamber (2). Insert clamp
bolts (13C), wash ers (13D) and tighten
clamp nuts (13B) in alternating pattern.
The clamp should be tightened to ap-
proximately 4 to 6 ft-lbs. (NOTE: Gap
be tween clamp (13A) halves should be
equal in size. - See Figure 1.
o. Replace eye nut (27) on guide post (22).
Ref to Section VI B. 3b previous to recall
the number of revolutions recorded for
removal.
p. Insert spring pin (32) through eye nut (27)
and guide post (22).
q. Place collar (28), bearing plate (29) and
base slide assembly (24) over guide post
(22).
r. Position cam (16) over guide post (22)
and insert quick release pin (15) through
holes in cam and post.
s. See Section IV for start up and adjustment
of set point and Section VII for Cleaning.
10D. For Sizes 1-1/2"-3" w/65-125 psig range
spring:
Clamp the lower end of the plug (18) in a
smooth jawed vice, around the outside edges
of the winged design.
a. Remove set screw (26).
b. Rotate guide post (22) CCW and remove
from locknut (25).
c. Place a wrench at the fl ats on the locknut
(25) and rotate CCW to remove nut from
plug (18).
d. Remove pressure plate (3), diaphragm
(14) and diaphragm spacer (38). NOTE:
Correct orientation of spacer (38) has
the side with the I.D. radius towards the
clamping surface of the plug.
e. Reinstall diaphragm spacer (38) on plug
(18). Place new diaphragm (14) with con-
volution side facing up, onto plug (18) and
fi t it around the diaphragm spacer (38).
f. Lay pressure plate (3) on top of diaphragm
(14).
g. Thread locknut (25) to plug (18) and
tighten to 60 in-lbs of torque.
h. Secure guide post assembly (22) to
threaded locknut (25) by hand. Adjust fi nal
rotation to ensure that the set screw (26)
will lock fi rmly against one of the surface
fl ats on the plug (18).
i. Apply Loctite 242 or equivelant to threads
of set screw (26) and thread tight into guide
post.
j. Replace plug/guide post assembly of parts
back into body (1). Align tab on diaphragm
with the tab slot cut in the body fl ange lip.
k. Place spring (7) over guide post (22).
l.
Install spring button(4) with adjusting screw
assembly (5) and bearing (23) down over
guide post (22) onto spring (7). Align one
tab (ear) on spring button (4) directly above
tab slot in the body fl ange lip.
m. Align the two ribs inside the spring cham-
ber (2) with the tabs on the spring button
(4) and place the spring chamber (2) over
assembled parts directly on body (1).