Blagdon X25 Manuel d'utilisation - Page 8

Parcourez en ligne ou téléchargez le pdf Manuel d'utilisation pour {nom_de_la_catégorie} Blagdon X25. Blagdon X25 12 pages. 05 series metallic fda models

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1. Parts List

IMPORTANT!

Read

these

completely,

installation and start-up. It

is the responsibility of the purchaser to

retain

this

manual

for

Failure

comply

recommendations

stated

manual will damage the pump, and

void factory warranty.

SERVICE

The following sections give a general

overview on how to service all

models of BLAGDON Diaphragm

Pumps. For details on individual part

numbers, quantities, materials, etc.,

please consult the parts list supplied

with the pump.

NOTE :

Before

commencing

any service or maintenance work

on the pump, ensure that the air

supply has been disconnected or

isolated.

AIR VALVE SYSTEMS

PNEUMATIC TYPE

Remove the 4

screws securing the valve block to

the valve chest, together with any

associated gaskets or seals.

Remove slide valve plate & slide

valve from the valve block assembly.

Clean

all

parts

thoroughly

inspect for excessive wear, replacing

where necessary.

The slide valve and valve plate

contact faces should be flat and free

from scratches. A light polishing on a

flat surface with a fine abrasive paper

will remove most scratches.

If excessive wear is suspected in the

valve block bore or valve carrier,

remove the valve block plugs and

withdraw the valve carrier. Check

valve block plug o-rings for wear or

attack & replace where required.

Clean the valve carrier & valve block

bore with white spirits to remove any

oil films.

NOTE :

The

diametrical clearance between the

valve carrier and the valve block

block bore should be 0.05 -

0.09mm. A clearance in excess of

this will cause the valve system to

run erratically.

Apply a light grease to the valve

block

plug

O-rings

assembling into the valve block bore.

Any damage to the O-ring may cause

HG-CF-1186 Rev. C, 20/04/15

the valve system to malfunction.

instructions

Re-assemble

before

assembly & re-torque in accordance

to the settings shown in the parts list.

reference.

In the event of a complete air-side

with

the

overhaul, the pump should be dis-

this

assembled

section assembly as described later

in the "Wet-Side Overhaul" section.

With

dismantled, remove the inner covers

where appropriate.

A careful note of the position of all

related seals and gaskets should be

made to facilitate re-assembly.

Remove diaphragm shaft bushes,

where appropriate, and check all

seals and 'O' rings for wear or

damage.

immediately.

NOTE:-

diaphragm shaft seals is essential

for the correct functioning of all

pneumatically

systems.

Check

excessive wear as this will result in

premature seal failure. Replace as

required.

and re-assemble as detailed above,

in reverse order. Ensure the correct

and

position of all components detailed in

all sectional assembly drawings.

WET-SIDE OVERHAUL

REPLACING

Remove discharge manifold from

pump

associated valve balls, seats and 'O'

rings.

NOTE :- The orientation of the

valve seat relative to the valve ball

should be noted as incorrect

positioning

performance loss.

Turn pump through 180

the suction manifold. Clean and

inspect the components. Check for

any wear or damage and replace as

nominal

required.

NOTE :- Ball or valve seat wear

may result in loss of performance

and suction lift.

Re-assemble the valve balls/seats

and ensure manifolds are adequately

torqued to the settings shown in the

when

re-

parts list.

the

valve

down

the

valve

block

assembly

worn,

replace

The

integrity

actuated

the

diaphragm

shaft

Lubricate all components

BALL

VALVES

assembly

together

may

result

and remove

REPLACING

Remove both suction and discharge

block

manifolds as detailed in the previous

section, removing all ball valves,

seats and 'O' rings.

Loosen

and

covers from the pump assembly.

centre

The orientation of the covers should

be noted so as to facilitate re-

assembly.

Holding one of the frontplates in a

vice, ('soft jaws' should be fitted), or

with an adjustable spanner, loosen

and remove the frontplate from the

opposite

diaphragm, backplate and bumpstop

from diaphragm shaft.

Carefully withdraw the diaphragm

shaft from the centre section and

hold the free end in a vice, holding

between the flats machined on the

end.

Loosen and remove the

frontplate and remove the diaphragm

the

together

bumpstop (where fitted).

NOTE :- Care should be taken with

valve

all plastic, coated and hygienic

pumps, so that the surface of the

for

frontplate is not damaged.

Thoroughly clean all parts and check

for wear, damage, swelling, cracking,

delamination and chemical attack.

Replace components where required.

NOTE

should be replaced if they are

worn to such an extent that the

fabric re-enforcing is evident on

the surface of the diaphragm.

with

For

pumps

diaphragms, a light coating of grease

should be applied to the back-up

diaphragm prior to re-assembly.

Before re-assembly, it is advisable to

check the condition of the diaphragm

shaft seal/'O' rings for wear or attack.

If either is evident, it is recommended

that they be replaced.

Assemble the diaphragms onto the

shaft in a reverse sequence to their

removal. Care should be taken as to

the orientation of the diaphragm

relative to the front and back plates.

All diaphragms have "AIR SIDE"

moulded

backplate must be fitted adjacent to

the AIR SIDE of the diaphragm.

DIAPHRAGMS

remove

both outer

end.

Remove

the

with

backplate

and

Rubber

diaphragms

fitted

with

PTFE

onto

one

side.

The

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