Bearings; Lubricants Used And Quantities; Intended Use - OMAC B Series Operation And Maintenance Manual

Rev.4 del 01/2011 O.M.A.C. s.r.l.

1.3.11 Bearings

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.
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.
Tables 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
(oil viscosity
ESSO SPARTAN EP 68
B100
SHELL
B105 B110 B115
CASTROL
B215 B220
BP ENERGOL GR-XP 100
B325 B330 B390
MOBIL MOBILGEAR 626
B430 B440
AGIP
B470 B490
FINA
table A
Table 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:
3) HARD PARTICLE SIZE: Maximum 80% of clearance between rotors (see sect.1.3.4)
PRE-ASSEMBLED BEARINGS
PUMP MODEL
FRONT
B105 B110 B115
B215 B220 32008X
B325 B330 B390 32010X
B430 B440 32014X
B470 B490 32016X
WORKING TEMPERATURE
from -20°C from +90°C to
to +90°C +150°C
(oil viscosity
ISO VG 68) ISO VG 150)
SPARTAN EP 150
OMALA OIL 68 OMALA OIL 150
ALPHA SP 68 ALPHA SP 150
ENERGOL GR-XP 150
MOBILGEAR 629
BLASIA 68 BLASIA 150
GIRAN 100 GIRAN 150
1) TEMPERATURE: from -35°C to +180°C
2) VISCOSITY: Maximum 200'000cPs with forced feeding
Via Giovanni Falcone, 8 42048 Rubiera (RE) - Italy
E-mail:info@omacpompe.com SitoWeb:www.omacpompe.com
PUMP MODEL
REAR
32006X
B100
32007X
32008X B550
32012X B660 B680
32014X
WORKING
TEMPERATURE
PUMP
BRAND da -20°C a +150°C
MODEL
(viscosità olio
ISO VG 150)
ESSO SPARTAN EP 150
SHELL OMALA OIL 150
CASTROL ALPHA SP 150
B550
B660 BP ENERGOL GR-XP 150
B680
MOBIL MOBILGEAR 629
AGIP BLASIA 150
FINA GIRAN 150
table B
O.M.A.C. s.r.l.
Tel.0522/629371 - 629923 Fax 0522/628980
ISO BEARINGS
FRONT REAR
TLA 3020 Z
NATB 5904
LRT 253020
NJ 2216 E 3214
NJ 224 E 3220
PUMP MODEL LITERS
B100 0.2
B105 B110 B115 0.5
B215 B220 1
B325 B330 B390 2.2
B430 B440 4.5
B470 B490 6.7
B550 15
B660 B680 30
table C
Chap.1 - pag.
11