User guide

x25fvdl2sm-rev0213
Model X25 Metallic • 14
www .bla gdon pump .com
Step 1: With manifolds and outer chambers
removed, remove diaphragm assemblies from
diaphragm rod. DO NOTuseapipewrenchorsimilar
tooltoremoveassemblyfromrod.Flawsintherod
surfacemaydamagebearingsandseal.Softjaws
in a vise are recommended to prevent diaphragm
rod damage.
Step 1.A: NOTE: Notallinnerdiaphragmplates
arethreaded.Somemodelsutilizeathrough hole
intheinnerdiaphragmplate.Ifrequiredtoseparate
diaphragm assembly, place assembly in a vise,
gripping on the exterior cast diameter of theinner
plate.Turntheouterplateclockwisetoseparatethe
assembly.
Alwaysinspect diaphragms for wear cracks or
chemicalattack. Inspectinnerand outerplatesfor
deformities,rustscaleandwear.Inspectintermediate
bearingsforelongationandwear.Inspectdiaphragm
rodforwearormarks.
Clean or repair if appropriate. Replace as required.
Step 2: Reassembly:Therearetwodifferenttypes
ofdiaphragmplateassembliesutilizedthroughoutthe
Sandpiperproductline:Outerplatewithathreaded
stud, diaphragm, and a threaded inner plate.
Outerplatewithathreadedstud,diaphragm,and
aninnerplatewiththroughhole.Secure threaded
innerplateinavise.Ensurethattheplatesarebeing
installedwiththeouterradiusagainstthediaphragm.
Step 3:Lightlylubricate,withacompatiblematerial,
the inner faces of both outer and inner diaphragm plates
whenusingonnonOverlaydiaphragms(ForEPDM
waterisrecommended).Nolubricationisrequired.
Step 4: Pushthe threaded outer diaphragm
plate through the center hole of the diaphragm.
Note: Most diaphragms are installed with the
naturalbulge out towards the fluid side.  S05,
S07,andS10non–metallicunitsareinstalled
withthenatural bulge in towards the air side.
Step 5: Thread or place, outer plate stud into
the inner plate. For threaded inner plates, use a
torquewrench to tighten the assembly together.
Torquevaluesarecalledoutontheexplodedview.
Repeat procedure for second side assembly.
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 6: Thread one assembly onto the diaphragm
rodwith sealingwasher(when used)andbumper.
Step 7: Install diaphragm rod assembly
into pump and secure by installing the outer
chamberinplaceandtighteningthecapscrews.
Step 8: On opposite side of pump, thread the
remainingassemblyontothediaphragmrod.Usinga
torquewrench,tightentheassemblytothediaphragm
rod.Aligndiaphragmthroughboltholes,alwaysgoing
forwardpasttherecommendedtorque.Torquevalues
arecalledoutontheexplodedview.NEVER reverse
to align holes, if alignment cannot be achieved
withoutdamage to diaphragm, loosen complete
assemblies, rotate diaphragm and reassemble as
described above.
Step 9: Complete assembly of entire unit.
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 rst
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.

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.
UNIVERSAL ALL SP
5: WET END