B41-818836conductiveacetal-rev0416
Model 41-818836 Conductive Acetal Ball Valve Pump Page 16
DIAPHRAGM SERVICING
To service the diaphragms first
shut off the suction, then shut off the
discharge lines to the pump. Shut
off the compressed air supply, bleed
the pressure from the pump, and
disconnect the air supply line from the
pump. Drain any remaining liquid from
the pump.
Step #1:
See the pump composite
repair parts drawing, and the diaphragm
servicing illustration.
Using a 1/2" wrench or socket,
remove the 16 capscrews (items 9 &
10), and flanged nuts that fasten the
elbows (items 16 and 17) to the outer
chambers (items 13). Remove the
elbows with the manifolds and spacers
attached.
Step #2:
Removing the outer
chambers.
Using a 1/2" wrench or socket,
remove the 16 capscrews (items 9
and 10), and flanged nuts that fasten
the outer chambers, diaphragms, and
intermediate (item 4) together.
Step #3:
Removing the diaphragm
assemblies.
Use a 3/4" (19mm) wrench or
six pointed socket to remove the
diaphragm assemblies (outer plate,
diaphragm, and inner plate) from the
diaphragm rod (item 30) by turning
counterclockwise.
Insert a 6-32 set screw into the
smaller tapped hole in the inner
diaphragm plate (item 27). Insert
the protruding stud and the 6-32
fastener loosely into a vise. Use a
3/4" wrench or socket to remove the
outer diaphragm plate (item 26) by
turning counterclockwise. Inspect the
diaphragm (item 14) for cuts, punctures,
abrasive wear or chemical attack.
Replace the diaphragms if necessary.
Step #4:
Installing the diaphragms.
Push the threaded stud of the outer
diaphragm plate through the center hole
of the diaphragm. Thread the inner plate
clockwise onto the stud. Insert the loose
assembly with the above 6-32 fastener
back into the vise. Use a torque wrench
to tighten the diaphragm assembly
together to 90 in lbs. (10.17 Newton
meters) 120 in lbs. Santoprene (13.56
Newton meters). Allow a minimum of 15
minutes to elapse after torquing, then
re-torque the assembly to compensate
for stress relaxation in the clamped
assembly.
Step #5:
Installing the diaphragm
assemblies to the pump.
Make sure the bumper (item 6) is
installed over the diaphragm rod.
Thread the stud of the one diaphragm
assembly clockwise into the tapped
hole at the end of the diaphragm rod
(item 30) until the inner diaphragm plate
is flush to the end of the rod. Insert rod
into pump.
Align the bolt holes in the diaphragm
with the bolt pattern in the intermediate
(item 4).
Fasten the outer chamber (item
13) to the pump, using the capscrews
(items 9 and 10) and flanged nuts.
On the opposite side of the pump,
pull the diaphragm rod out as far as
possible. Make sure the bumper (item
6) is installed over the diaphragm rod.
Thread the stud of the remaining
diaphragm assembly clockwise into the
tapped hole at the end of the diaphragm
rod (item 30) as far as possible and
still allow for alignment of the bolt
holes in the diaphragm with the bolt
pattern in the inner chamber. Install
diaphragms with convolutions facing
towards center of pump. See sectional
view on previous page.
Fasten the remaining outer chamber
(item 13) to the pump, using the
capscrews (items 9 and 10) and flanged
nuts.
Step #6:
Re-install the elbow/
spacer/manifold assemblies to the
pump, using the capscrews (items 9 &
10) and flanged nuts.
The pump is now ready to be
re-installed, connected and returned to
operation.
OVERLAY DIAPHRAGM SERVICING
The overlay diaphragm (item 15) is
designed to fit snugly over the exterior of
the standard TPE diaphragm (item14).
Read these instructions
completely, before in-
stallation and start-up.
It is the responsibility of
the purchaser to retain
this manual for reference. Failure to
comply with the recommendations stated
in this manual will damage the pump, and
void factory warranty.
IMPORTANT
