Blagdon Pump X40 Metallic - Manual (Page 18)

Blagdon Pump • A Unit of IDEX Corporation • R79 Shannon Industrial Estate • Shannon, Co Clare, Ireland • Tel: +353 (0) 61 471933 Fax: +353 (0) 61 475046
www.blagdonpump.com • E-mail: [email protected]
x40mdl1sm-rev1111
Page 16
Air Operated Double Diaphragm Pump 8/05 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 assembly
drawing, and the diaphragm servicing
illustration.
Using a 9/16" wrench or socket,
remove the 16 capscrews (item 10), and
hex nuts that fasten the manifolds (items
22 & 23) to the outer chambers (item 14).
Step #2: Removing the outer
chambers.
Using a 11/16" and a 5/8" wrench or
socket, remove the 16 capscrews (items
9), and hex nuts that fasten the outer
chambers, diaphragms, and inner
chambers (items 15) together.
Step #3: Removing the diaphragm
assemblies.
Use a 1 1 /
16
" (27mm) wrench or six
pointed socket to remove the diaphragm
assemblies (outer plate, diaphragm, and
inner plate) from the diaphragm rod
(item 32) by turning counterclockwise.
NOTE: To uninstall the diaphragm
plates from the diaphragm, hold the inner
diaphragm plate using one of two
methods:
Preferred Method: Place the
assembled plates and diaphragm in a
large vise, gripping on the exterior cast
diameter of the inner diaphragm plate
(see the drawing at far right).
Alternate Method: When a larger vise
is not available, insert a 1/4 - 20UNC
hex capscrew or setscrew (standard
hardware) into the tapped hole in the inner
diaphragm plate. Insert the assembled
plates and diaphragm into a vise with
the stud from the outer plate and the
1/4 - 20 fastener loosely between the
jaws of the vise (see illustration at right).
Use a 1 1 /
16
" wrench or socket to
remove the outer diaphragm plate (item
29) 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 one of the
two methods for holding the inner
diaphragm plate that was described in
prior note in step #3. Use a torque wrench
to tighten the diaphragm assembly
together to 50 ft. lbs. (67.79 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
32) 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).
Fasten the outer chamber (item 14)
to the pump, using the capscrews (items
9), and hex 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 32) as far as possible and still
allow for alignment of the bolt holes in
the diaphragm with the bolt pattern in
the inner chamber (item 15).
Fasten the remaining outer chamber
(item 14) to the pump, using the
capscrews (items 9), and hex nuts.
Step #6: Re-install the manifolds to
the pump, using the capscrews (items
10), hex nuts and flat washers.
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
The pump is now ready to be
re-installed, connected and returned to
operation.
OVERLAY DIAPHRAGM SERVICING
The overlay diaphragm (item 16)
is designed to fit 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.
Alternate Method:
Install 1/4 - 20UNC fastener
into tapped hole.
Preferred Method:
Grip this exterior
cast diameter.