SANDPIPER M10 Non-Metallic - Manual (Page 26)

M10nmdl1sm-rev0513 Models M10 Non-Metallic Page 24
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 nuts that fasten the elbows
(items 17) to the outer chambers
(items 14). 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 & 11), and nuts that fasten the
outer chambers, diaphragms, and
intermediate bracket (items 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 31) 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 15) 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. 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 31) 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 inner
chamber (item 4). Make sure the
molded directional arrows on the
diaphragm point vertically.
Fasten the outer chamber (item 14)
to the pump, using the capscrews (items
9 & 11), hex nuts and flat washers.
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 31) as far as possible and still
allow for alignment of the bolt holes
in the diaphragm with the bolt pattern
in the inner chamber. The molded
directional arrows on the diaphragm
must point vertically.
Fasten the remaining outer chamber
(item 14) to the pump, using the
capscrews (items 9 & 11) and nuts.
Step #6: Re-install the elbow/
spacer/manifold assemblies to the
pump, using the capscrews (items 9 &
10) and nuts.
The pump is now ready to be
re-installed, connected and returned to
operation.
OVERLAY DIAPHRAGM SERVICING
The PTFE overlay diaphragm (item
16) is designed to fit snugly over the
exterior of the standard TPE diaphragm
(item 15).
The molded directional arrows
on the overlay diaphragm must point
vertically.
Follow the same procedures
described for the standard diaphragm
f o r r e m o v a l a n d i n s t a l l a t i o n .
Read these instructions
completely, before
installation 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
ONE PIECE DIAPHRAGM SERVICING
(Bonded PTFE with integral plate)
The One Piece diaphragm has a
threaded stud installed in the integral
plate at the factory. The inner diaphragm
plate has a through hole instead of a
threaded hole.
Place the inner plate over the
diaphragm stud and thread the first
diaphragm / inner plate onto the
diaphragm rod only until the inner plate
contacts the rod. Do not tighten.
A small amount of grease may be
applied between the inner plate and the
diaphragm to facilitate assembly.
Insert the diaphragm / rod assembly
into the pump and install the outer
chamber. Turn the pump over and
thread the second diaphragm / inner
plate onto the diaphragm rod. Turn the
diaphragm until the inner plate contacts
the rod and hand tighten the assembly.
Continue tightening until the bolt holes
align with the inner chamber holes. DO
NOT LEAVE THE ASSEMBLY LOOSE.