General Maintenance - OMAC B Series Installation, Operation And Maintenance Manual

7 - Start the pump possibly at reduced speed, then increase it till it reaches the duty speed, checking possible troubles
(pressure overload, loss in piping, cavitation, vibration).
8 - If the duty speed is very high, it's normal that the bearing housing temperaturs reaches 50-60°C, expecially during
the first working hours.

4. GENERAL MAINTENANCE

4.1 - LUBRICATION
1 - OMAC pumps are delivered ready filled with oil of ISO VG 68.
Advised lubricants Tab. 9
MAKE
da –20°C a + 90°C
ESSO SPARTAN EP 68
SHELL OMALA OIL 68
CASTROL ALPHA SP 68
BP ENERGOL GR-XP 100
MOBIL MOBILGEAR 626
AGIP BLASIA 68
FINA GIRAN 100
2 - Check every day the oil level arranged on pump side, which must be completly filled with the pump off.
3 - When necessary top up using the lubricant oil as per Tab. 9.
4 - If the pump is used with vertical openings invert the plug position with the oil level.
5 - The oil replacement should be carried out after running-in of about 150 working hours, then after every 2500 hours.
6 - If the bearing housing works constantly with temperatures over 90°C, lubricate by means of oil with higher viscosity
(see Tab. 9) and replace it every 1000 working hours.
4.2 - SINGLE BALANCED MECHANICAL SEALS Fig. 23 - 24
1 - The mechanical seals require no maintenance.
2 - If a leakage occurs, because of contact surface wear, replace the complete seal (see disassembling instructions).
3 - In case of long working with worn seals, check the pruduct doesn't enter the bearing housing.
4 - IMPORTANT: Don't work the simple mechanical seals dry.
4.3 - FLUSHED MECHANICAL SEALS Fig. 25
1 - As well as the single mechanical seals, the flushed mechanical seals require no maintenance.
2 - When the mechanical seal is replaced, replace the turning ring (224) and the lip ring (223) of the auxiliary seal
too.
3 - With a well connected flushing, the pump can work even with no product being pumped, because the seals can
not become overheated.
4 - Check the fluxing is efficient during the pump working, in order not to damage the auxiliary seals (see connection
diagram Fig. 9).
5 - To disassemble the flushed mechanical seals, see single mechanical seals instructions.
6 - To remove the stationary part of the mechanical seal, remove the flushing box from the rotor case.
7 - During the assembling, before inserting the rotating part of the mechanical seal, put rightly the turning ring (224)
and assemble the auxiliary sealing ring (223) in its seat on the flushing box (220) according to drawing Fig. 25.
4.4 - SEALS BALANCING
1 - All the mechanical seals of the lobe pumps are balanced, that is with stationary part locked by a special balancing
ring 210 - 230 (Fig. 23 - 24 - 25).
DUTY TEMPERATURE
da +90°C a + 150°C
SPARTAN EP 150
OMALA OIL 150
ALPHA SP 150
ENERGOL GR-XP 150
MOBILGEAR 629
BLASIA 150
GIRAN 150
Oil quantity Tab. 10
PUMP TYPE
B100
B105 - B110 - B115
B215 - B220
B325 - B330
B430 - B440
B470 - B490
B550
B660-B680
9
LITER
0,2
0,5
1
2,2
4,5
6,7
15
30