O.M.A.C. s.r.l.
Via Giovanni Falcone, 8 42048 Rubiera (RE) - Italy Tel.0522/629371 - 629923 Fax 0522/628980
Rev.4 del 01/2011 O.M.A.C. s.r.l.
The LDPU has been designed and made for two types of use:
alimentary use;
chemical use.
WARNING:
The LDPU, for alimentary use, has been made to ensure a hygienic standard equal to LEVEL 1, on the basis of UNI EN 13951.
The LDPU for alimentary use and for chemical use has been designed to transfer volumes of fl uids without altering the organoleptic properties nor the
physical properties.
WARNING:
During its normal use, the LDPU for alimentary use and chemical use does not alter the organoleptic characteristics nor the physical characteristics of
the processed fl uid.
Every LDPU comes with a technical sheet indicating the operational features in relation to the processed fl uid that must be handled (name of the
fl u id, viscosity range, capacity range, speed range, temperature range), as declared at the time of purchase by the Customer.
Section 1.3 shows a facsimile of the LDPU technical sheet.
Every modifi cation to what is indicated in the specifi c technical sheet or variation of the machine operating parameters must be authorised in writing by
O.M.A.C. s.r.l.; the absence of such authorisation is deemed “improper use” and will void any warranty or liability under way between Manufacturer and
Customer.
DANGER:
Any use of the LDPU in conditions other than those indicated in “Fluid properties and range of use” and in conditions other than those indicated in the
machine technical sheet is forbidden, without explicit written authorisation, issued by O.M.A.C. s.r.l.
The LDPU for alimentary use and for chemical use has NOT been designed nor built to handle pharmaceutical, explosive, etc. fl uids, and in general
fl u ids that do not comply with the indications of the specifi c technical sheet. In addition, the LDPU for alimentary use and chemical use has NOT been
designed nor built to handle what is indicated in Regulation (EC) No. 1005/2009 of the European Parliament and the Council of 16 September, 2009, on
substances that deplete the ozone layer.
ATTENTION:
It is forbidden to use the LDPU for alimentary use and chemical use to transfer the substances listed in Annex I of Regulation No. 1005/2009.
The pumping part of the LDPU is made up of the pump body, in which two rotors are housed (sect. 1.3.5 lists the types of rotors used), which rotate
synchronised in the opposite direction to each other.
The pump body receives the process fl uid from the suction inlet, originating from the plant of the Customer. During the operation of the LDPU, the
cavities between the lobes of the rotors are fi lled with fl uid and the counter-rotation of the rotors transfers the fl uid to the delivery outlet of the pump body,
channelling it in the plant where the LDPU is installed.
1.4.1 Recommended use guidelines for the transfer of some types of processed fl uid
As an example, the following table lists some types of fl uids that can be processed by the “B series lobe displacement pump”, part of the LDPU; for each
one, we suggest a value or range of viscosity, fl uid temperature, pump rotation speed, O.M.A.C. identifi cation code of materials for seals, gaskets and
rotors (see coding section 1.2.2).
The application requested by the customer is examined by the O.M.A.C. s.r.l. Technical Offi ce, which edits the technical sheet of the LDPU, specifi cally
for the requested application.
Therefore, in all cases and without any exceptions, one must comply with the technical specifi cations, shown in the technical sheet of the B series lobe
displacement pump unit, these specifi cations have absolute priority over the data shown in the next table.
ATTENTION
On the basis of the features of the processed fl uid, O.M.A.C. identifi es and uses materials compatible with the proper processability of the fl uid, and these
features are specifi cally mentioned in the technical sheet of the LDPU.
PRODUCTS
VISCOSITY
cPs
TEMPERATURE
°C
SPEED
RPM
SEALS
O-RING
ROTORS
1° 2° 1° 2°
DAIRY PRODUCTS
MILK 2 18 250-400 3 0 T 0 -
YOGHURT 50-150 20-40 250-350 6 3 T 0 -
BUTTER 50000 4 20-70 5 - T 5 -
CREAM 30% 14 16 250-350 3 0 T 0 -
CURD 20-500 10 50-200 3 0 T 0 5
CONDENSED MILK 40-80 40 250-450 3 0 T 0 -
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