s07nmdl1sm-rev0817
sandpiperpump
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18
• Model S07 Non-Metallic
Diaphragm Servicing
IMPORTANT
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.
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 16) 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 11), and
nuts that fasten the outer chambers,
diaphragms, and intermediate bracket
(item 4) together.
Step #3:
Removing the diaphragm
assemblies.
Use a 3/4" 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 26). 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 25) 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.
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
bracket (item 4). Make sure the molded
directional arrows on the diaphragm point
vertically.
Fasten the outer chamber (item 13) 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
( i t e m 6 ) i s i n s t a l l e d o v e r t h e
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. The molded directional
arrows on the diaphragm must point
vertically.
Fasten the remaining outer chamber
(item 13) to the pump, using the capscrews
(items 9 and 11) and hex nuts.
Step #6:
Re-install the elbow/spacer/
manifold assemblies to the pump, using
the capscrews (items 9 & 10) and hex
nuts.
The pump is now ready to be
re-installed, connected and returned to
operation.
OVERLAY DIAPHRAGM SERVICING
The PTFE overlay diaphragm
(item 15) is designed to fit snugly over the
exterior of the standard TPE diaphragm
(item 14).
The molded directional arrows
on the overlay diaphragm must point
vertically.
Follow the same procedures
described for the standard diaphragm
for removal and installation.
Follow the same procedures
described for the standard diaphragm
for removal and installation.
Note:
The One-Piece Bonded diaphragm is
installed in the direction as shown in the
lower right illustration above.
O N E P I E C E D I A P H R A G M
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.
5: WET END