SANDPIPER S15 Non-Metallic User Manual

Page 29

520-193-000

9/02

Model S15 Non-Metallic Design Level 2 Page 27

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

" wrench or socket,

remove the 16 capscrews (items 10), hex

nuts and washers that fasten the elbows

(items 19) to the outer chambers (items

14). Remove the elbows with the

manifolds and spacers attached.

Step #2: Removing the outer

chambers.

Using a

" wrench or socket,

remove the 16 capscrews (items 11), hex

nuts and washers that fasten the outer

chambers, diaphragms, and inner

chambers (items 15) together.

Step #3: Removing the diaphragm

assemblies.

Use a 1

" (35mm) 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 1/4-20 capscrew or set screw

into the smaller tapped hole in the inner

diaphragm plate (item 28). Insert the

protruding stud and the 1/4-20 fastener

loosely into a vise. Use a 1

" wrench or

socket to remove the outer diaphragm

plate (item 27) by turning

counterclockwise. Inspect the

diaphragm (item 17) 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 480 in Lbs. (54.23

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 15). Make sure the molded

directional arrows on the diaphragm point

vertically.

Fasten the outer chamber (item 14)

to the pump, using the capscrews (items

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 11), hex nuts and flat

washers.

Step #6: Re-install the elbow/spacer/

manifold assemblies to the pump, using

the capscrews (items 10), hex nuts and

flat washers.

The pump is now ready to be re-

installed, connected and returned to

operation.

OVERLAY DIAPHRAGM SERVICING

The PTFE overlay diaphragm (item

18) is designed to fit snugly over the

exterior of the standard TPE diaphragm

(item 17).

The molded directional arrows on the

overlay diaphragm must point vertically.

Follow the same procedures

described for the standard diaphragm for

removal and installation.

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