11
O.M.A.C. s.r.l.
Via Giovanni Falcone, 8 42048 Rubiera (RE) - Italy Tel.0522/629371 - 629923 Fax 0522/628980
E-mail:info@omacpompe.com SitoWeb:www.omacpompe.com
Rev.4 del 01/2011 O.M.A.C. s.r.l.
Chap.1 - pag.
1.3.11 Bearings
The front bearing has position number 29, whilst the rear bearing has position number 30, with reference to the exploded view of page 5 in this chapter.
The bearings of pump mod. B100 are ISO standard radial rollers type. The radial rear roller bearings combined with NATB 5904 oblique ball
bearings, undergo an assembly adaptation to cancel the axial play.
The bearings of pump mod. B5 - B6 are ISO standard cylindrical and oblique type with two rows of balls, commonly available on the market.
The bearings of pump mod. B1 - B2 - B3 - B4 - B470 – B490 are made up of two metric bearings with a single row of conical rollers, by a
spacer for the internal rings and by a spacer for the external rings. The assembly of the bearings is performed accurately by our technicians to ensure
ideal rotation without play. For this reason, these bearings must be requested directly from O.M.A.C. s.r.l. that supplies them already pre-assembled with
the right pre-load.
The duration of the bearings varies signifi cantly according to the varying of the working conditions (speed, pressure, absorbed power) and
therefore one cannot defi ne it beforehand.
1.3.12 Lubricants used and quantities
The three tables show the general features of lubricant oil that can be used to lubricate bearings and sprocket wheels.
Tab les A and B show the type of oil to be used according to the temperature of the processed fl uid (from -20°C to +90°C, and from +90°C to +150°C):
table A only refers to lobe displacement pump models B100, B105, B110, B115, B215, B220, B325, B330, B390, B430, B440, B470, B490; table B only
refers to lobe displacement pump models B550, B660, B680.
The lines of the table that refer to “BRAND” list a series of possible suppliers where the lubricant can be bought.
PUMP MODEL BRAND
WORKING TEMPERATURE
PUMP
MODEL
BRAND
WORKING
TEMPERATURE
PUMP MODEL LITERS
from -20°C
to +90°C
(oil viscosity
ISO VG 68)
from +90°C to
+150°C
(oil viscosity
ISO VG 150)
da -20°C a +150°C
(viscosità olio
ISO VG 150)
B100 0.2
B100
B105 B110 B115
B215 B220
B325 B330 B390
B430 B440
B470 B490
ESSO SPARTAN EP 68 SPARTAN EP 150
B550
B660
B680
ESSO SPARTAN EP 150 B105 B110 B115 0.5
SHELL OMALA OIL 68 OMALA OIL 150 SHELL OMALA OIL 150 B215 B220 1
CASTROL ALPHA SP 68 ALPHA SP 150 CASTROL ALPHA SP 150 B325 B330 B390 2.2
BP ENERGOL GR-XP 100 ENERGOL GR-XP 150 BP ENERGOL GR-XP 150 B430 B440 4.5
MOBIL MOBILGEAR 626 MOBILGEAR 629 MOBIL MOBILGEAR 629 B470 B490 6.7
AGIP BLASIA 68 BLASIA 150 AGIP BLASIA 150 B550 15
FINA GIRAN 100 GIRAN 150 FINA GIRAN 150 B660 B680 30
table A table B table C
Tab le C shows the amount of lubricant, expressed in litres, to be inserted in the gear box, according to the pump size, and after having removed the
previous exhausted oil, as described in chapter 5.
Should it be expressly requested by the customer, the B series lobe pump can be equipped with alimentary type lubricant oil, NSF certifi ed in H1 cate-
gory.
1.4 Intended use
The “B Series Lobe Displacement Pump Unit”, marketed by O.M.A.C. s.r.l., which in this documentation will be indicated with the abbreviation LDPU, has
been designed and made to be assembled in industrial plants owned by third parties, to transfer volumes of fl uids, compatible with the materials used
during the construction of this machine: section 1.4.1 lists the recommended operational features of the LDPU, depending on the processed fl uid.
The LDPU requires compliance with all technical indications in this use and maintenance manual, which in this documentation will be indicated with the
abbreviation UMM, for its proper installation.
In general, the processed fl uids must meet the following specifi cations:
Fluid properties and range of use:
1) TEMPERATURE: from -35°C to +180°C
2) VISCOSITY: Maximum 200’000cPs with forced feeding
3) HARD PARTICLE SIZE: Maximum 80% of clearance between rotors (see sect.1.3.4)
•
•
•
•
The two tables to the side show,
according to the pump size, the
identity abbreviations of the bearin-
gs fi tted on the transmission shafts
of the B Series lobe displacement
pump, inserted in the LDPU.
PUMP MODEL
PRE-ASSEMBLED BEARINGS
FRONT REAR
B105 B110 B115 32006X
B215 B220 32008X 32007X
B325 B330 B390 32010X 32008X
B430 B440 32014X 32012X
B470 B490 32016X 32014X
PUMP MODEL
ISO BEARINGS
FRONT REAR
B100
TLA 3020 Z
NATB 5904
LRT 253020
B550 NJ 2216 E 3214
B660 B680 NJ 224 E 3220
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