OMI.EN-PCP001 R01 (Funct. and Maint.Manual n.03 – Fourth edition) Pag.14
7 STARTUP
IMPORTANT!
•
Never operate the pump without product - this is mandatory, otherwise the
stator, made of elastomeric material will overheat and may burn. A few seconds are
enough to cause damage to the stator.
•
The eccentric screw pump is of the volumetric kind, therefore it shall NEVER be
operated with a closed delivery valve. Since the theoretical pressure is infinite,
this would cause excessive stress with partial or total damage to the pump or
piping.
•
Before startup, check that the direction of rotation were correct.
7.1 Advice for optimal operation
To achieve long life and high performance, it is useful to follow these recommendations:
•
The pump is self-priming, but it is advisable to fill its body with the liquid to be
pumped before the first startup.
•
Control the rate of delivery by modifying the rpm of the motor instead of setting
choking valves.
•
Install an immediate stop device in case of absence of liquid at intake, by means of
a temperature sensor on the stator, to stop the pump after a few seconds of dry
operation.
7.2 Pumps for alimentary use
The startup of pumps to be used with food requires the plant to be perfectly clean.
Cleaning may be performed in two ways:
PUMP 1 STAGE 2 STAGE 3 STAGE 4 STAGE
010
-
80
-
-
015
80
160
-
-
020
110
170
-
360
030
160
300
-
-
040
200
420
-
-
050
260
-
530
-
053
-
-
-
530
055
270
550
-
980
060
440
-
-
1230
062
320
630
-
-
080
440
880
-
-
120
500
-
-
-
200
540
-
-
-
300
540
1050
-
2110
400
660
1260
-
-
500
820
1580
-
-
