MANN+HUMMEL 51 Series Setup guide

Order No. 1994 29 23 01 Version 1201 Printed in Germany
Maintenance and repair instructions
Plate gap-type filter
Series 51 and 55

Plate gap-type filter, Series 51 and 55
MANN+HUMMEL Industrial Filters 2
Contact Information:
FILTERWERK MANN+HUMMEL GMBH
Business Unit Industrial Filters
Technical Service
Brunckstr. 15,
67346 Speyer
Germany
Technical Service Hotline
Tel: [phone] - 8265
Fax: [phone] - 8370
Contents
1. Preface __________________________________ 2
2. Safety ___________________________________ 3
2.1. Warnings and symbols....................................3
2.2. Use according to the regulations.....................3
2.3. Operational safety ..........................................3
3. Working principles ________________________ 4
3.1. General points................................................4
3.2. Cleaning.........................................................4
3.3. Scraping dirt...................................................4
4. Instruction to find malfunctions _____________ 5
5. Servicing/Corrective maintenance ___________ 6
5.1. General instructions........................................6
5.2. Service plan ...................................................6
5.3. Repair procedure............................................7
5.4. Removing filter insert and disassembly...........8
6. Spare parts list____________________________ 8
7. Tools required ____________________________ 8
Enclosure
Customer drawing
1. Preface
We reserve the right to make technical
changes to the filter and/or changes to the
contents of these maintenance and repair
instructions.
MANN+HUMMEL GMBH is not liable for any
technical errors or technical printing errors or
omissions in these instructions. Furthermore,
MANN+HUMMEL GMBH accepts no liability
for damage relating either directly or indi-
rectly to the supply, suitability or use of these
instructions.
This document contains important instruc-
tions for safe, proper and economical opera-
tion of the MANN parts supplied. Following
these instructions will help to avoid danger,
reduce repair costs and downtimes, increase
reliability and prolong the life of your MANN
product.
The following maintenance and repair in-
structions are for the standard filter.
The instructions must be accessible to all
persons charged with carrying out work on
the MANN filter.
Furthermore, if necessary, these instructions
must be supplemented to take into account
existing accident prevention and environ-
mental regulations (especially with regard to
the disposal of parts) applicable in the coun-
try of use.
In addition to the instructions and the binding
accident prevention regulations applicable in
the country of use and on site, the generally
recognised rules of sound engineering prac-
tice must be observed.

Plate gap-type filter, Series 51 and 55
MANN+HUMMEL Industrial Filters 3
2. Safety
2.1 Warnings and symbols
Indicates all points in the manual
affecting your personal safety.
Non-observance of these in-
structions may endanger life and
limb.
Indicates all points in this man-
ual which must be followed
closely in order to avoid damage
to or destruction of part of the
system.
Indicates what the user should
pay close attention to in order to
ensure trouble-free and eco-
nomical operation of the equip-
ment.
2.2 Use according to the regulations
The plate gap-type filter is manufactured
in accordance with the latest state-of-the-
art and complies with the generally rec-
ognised safety regulations. Nevertheless,
when in use there could be a risk to life
and limb of the user or third party or
damage to the filter or other material as-
sets
- if the plate gap-type filter is used im-
properly,
- if the operating conditions are
changed,
- if changes or modifications not ex-
pressly approved by the manufacturer
are made,
- if essential maintenance and repair
work is not carried out.
Only use the plate gap-type filter if it is in
perfect working order and if it is to be used in
the manner intended in accordance with its
technical design. In addition, observe all the
safety instructions contained in this manual
and heed all the warnings. In particular,
faults which impair the safety of this equip-
ment must be rectified immediately.
The plate gap-type filter is designed to filter
by mechanical means mediums which have a
high viscosity. Any other or additional use,
such as, for example, the filtering of liquid
foodstuffs or other semi-luxury items, and
aggressive, inflammable and/or explosive
mediums is not in accordance with the regu-
lations. The filter manufacturer/supplier ac-
cepts no liability whatsoever for damages
arising from such use. All the risk is carried
solely by the user.
Use according to the regulations also in-
cludes observance of the instructions in the
operating manual and compliance with the
inspection and maintenance instructions.
The filter manufacturer accepts no liability
whatsoever for any dangers arising from the
medium to be filtered. This is especially valid
for the processing of materials dangerous to
human health or the environment. Regarding
this the operating authority of the plate gap-
type filter is responsible for providing the
necessary safety equipment.
2.3 Operational safety
The gap type filter should only be serviced
and used by trained and authorised person-
nel.
The use of working methods detrimental to
the correct function of the plate gap-type fil-
ter is not allowed.
The operating authority is obliged to check
the plate gap-type filter once per week for
visible signs of damage or deficiency and to
immediately notify the responsible service
person of any changes (including changes
observed during operation of the filter) which
may reduce safety.
Unauthorised changes or modifications to
the plate gap-type filter are generally not
permitted for safety reasons and will render
the manufacturer’s warranty null and void
with immediate effect.

Plate gap-type filter, Series 51 and 55
MANN+HUMMEL Industrial Filters 4
When performing work affecting start-up,
operation, modifications to conditions of use
and methods of operation, maintenance, in-
spection and repair, the respective manda-
tory shutdown procedures in the operating
manuals must be observed.
All labelling and identification markings on
the gap filter must be maintained in a read-
able condition.
3. Working principles
3.1 General points
The plate gap-type filter system consists of a
housing and filter insert with gap cleaner.
The fluid to be filtered flows through the body
of the filter from the outside to the inside.
Impurities larger than the gap width are fil-
tered out and either sink to the housing bot-
tom or with the passing of time form a filter
cake which can be scraped off by turning the
filter insert. Scraping of the gap tube can be
carried out during normal operation.
3.2 Cleaning
The medium to be cleaned flows via the filter
inlet into the housing and passes the filter
body from outside to inside. All impurities
present in the medium which are larger than
the gap width are retained on the filter body
surface. The coarse dirt particles either sink
to the lower conical part of the housing or
form a filter cake on the filter body exterior.
3.3 Dirt scraping
Turning the filter insert manually causes the
filter body to rotate and pass by gap cleaners
and the filter cake is scraped. The cake sinks
into the lower part of the housing and when
necessary is discharged via the sludge outlet
valve (not on series 51 207 6X 021). To sim-
plify the disposal of the solid particles filtered
out, a drying valve may be optionally in-
stalled.

Plate gap-type filter, Series 51 and 55
MANN+HUMMEL Industrial Filters 5
4. Instruction to find malfunctions
The filter insert should only be
dismantled by trained service per-
sonnel, otherwise the manufac-
turer’s warranty is rendered null
and void with immediate effect.
The warranty is invalid if one or
more of the following point leads
to a filter breakdown:
•natural wear and tear;
•incompentent handling;
•incompentent service or repair work
carried out by unauthorised persons;
•Fitting errors during fitting
and removal;
•Modifications made without approval;
•Corrosion damage occurring during trans-
port.
Malfunction/fault Cause Removal
Leak on housing cover Cover seal damaged (pos. h, Fig
page 7) Replace O-Ring seal (see section 5.4).
Leak on shaft seal Shaft seal damaged (pos. 10, cus-
tomer drawing) Post-adjust or replace shaft seal if neces- sary (see section 5.4).
Plate gap-type filter filters medium
insufficiently (too much dirt remaining) plate gap-type filter insert damaged Take out plate gap-type filter insert and check for damage (see section 5.4) and if
necessary completely replace.
Flow volume goes down and/or
differential pressure rises steeply. Filter body filled with dirt
Gap cleaner worn out
Too much sludge in plate gap-type
filter
Turn plate gap-type filter; check again
and shorten turning intervals if necessary.
Take out gap filter insert, check for dam-
age (see section 5.4) and if necessary
replace completely.
Let out sludge, clean filter insert and
housing, shorten sludge discharge inter-
val.
Gap filter insert cannot be turned Too much sludge in gap filter
Filter body and /or gap cleaner
worn out
Let out sludge, clean filter insert and
housing, shorten sludge discharge inter-
val.
Take out gap filter insert, check for dam-
age (see section 5.4) and if necessary
replace completely.

Plate gap-type filter, Series 51 and 55
MANN+HUMMEL Industrial Filters 6
5. Servicing/Corrective maintenance
During cleaning, servicing and
repair work the customer’s system
must be switched off. Ensure the
system is pressure-free. Make
sure that the system cannot be
accidentally switched on. Do not
start the system if the filter ele-
ment has been removed
5.1 General points
Servicing the MANN plate gap-type filter is
usually limited to removing the accumulated
dirt from the filter body. This can be carried
out without a break in operation by turning
the handle.
Only carry out cleaning and correc-
tive maintenance when the system
is switched off..
5.2 Service plan
1) Service intervals must be adjusted to take into account dirt concentration levels, density and type of dirt. The
higher the dirt concentration, the lower the dirt density and the more difficult the type of dirt, then the service inter-
vals must be shortened accordingly, whereas a lower dirt concentration, high dirt density and less difficult type of
dirt may mean the service intervals can be substantially extended.
System part Action Carried out by Service interval
sludge outlet allow sludge to discharge trained personnel daily1)
housing check inside for deposits and
clean if necessary trained personnel every 3 months1)
seal (O-ring) on
housing check and replace if necessary trained personnel every 3 months1)
gap filter insert remove, check for damage and
clean trained personnel every 3 months1)
shaft seal on filter
head check for leaks and post-adjust or replace if necessary trained personnel every 3 months1)
filter body check for damage and load in-
crease trained personnel every 3 months1)
gap cleaner check condition and wear and tear trained personnel every 3 months1)

Gap Filters Series 51, 53, 54
MANN+HUMMEL Industrial Filters 7
5.3. Service procedure
To service turn filter body (a) by using
handle (b) once or twice. The gap cleaner
(c) removes the dirt. The dirt sinks down
into the sludge compartment (d) of the
filter housing and is discharged from time
to time by unscrewing the outlet screw (e)
(not on series 51 207 6X 021).
Cleaning is most effective when
turning the filter packet is carried out
immediately after the end of opera-
tion so that the scraped sludge can
sink down into the sludge compart-
ment (d) during the break in opera-
tion.
Remove heavily soiled filter inserts (see
section 5.4), soak in detergent, and wash
out.
If gland (f) on filter cover leaks, then loosen
packing gland counternut (i) and gently
tighten the packing gland screw (g).
The handle must remain operational, too
much tightening can destroy the packing
gland.
After that retighten the packing gland
counternut.
Post-adjustment is not possible with models
having an O-ring, shaft seal ring, or sliding
ring seal.
When faults occur never use brute force to
turn the handle. Damaged filter inserts, or
those which are no longer possible to turn,
must be replaced.
Section of a MANN gap filter
a = filter body
b = handle (or ratchet)
c = gap cleaner or scraper
d = sludge chamber
e = outlet screw
f = packing collar or O-ring
g = packing colar screw
h = housing seal
i = packing collar counternut
k = seal locking screws
l = hex. nut

Gap Filters Series 51, 53, 54
MANN+HUMMEL Industrial Filters 8
5.4 Removing the filter insert
and disassembly
•Carefully open breather screw (see cus-
tomer drawing, only present with larger
sizes) 1 1/2 turns (the breather screw
has drilled holes on the side).
•Mark the installation position of the filter
insert relative to the housing (use
breather screw as reference point).
•Remove hex. nuts (pos. l, drawing page
7) and carefully pull out filter insert from
the top or remove the filter base down-
wards (according to the size).
•Check O-ring seal (pos. h, drawing page
7) for damage and renew if necessary
Plate gap filter inserts can not be
further disassembled and in case of
damage or wear must be replaced.
6. Spare parts list
see attached customer drawing
7. Tools required
- Open ended spanner set, metric sizes
10 to 41 (accord. to filter size or type)
- Container with petroleum ether for
cleaning or diesel
- Cleaning rags