SPXFLOW Seital Separation SE 40CX-Q2P2, Инструкция по эксплуатации

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Chapter 8
Rev. 1 of 14/01/97
SEITAL S.r.l.
Use and maintenance handbook: Centrifugal separator
SE 40CX
Page 8-3
2) Regulate shutter A in order to bring the pressure on the manometer to approximately 0,1

0,2 bar up the MWP.
3) Still close the shutter A to obtain a cream more liquid than desired.
4) Close shutter B to increase cream concentration.
5) If some foam is present in buttermilk or cream, it’s necessary to close shutters A and B.
Cream too liquid
- Close shutters B. If this is not sufficient open a little bit shutter A.
Cream too thick
- Increase buttermilk pressure by closing shutter A and open a little bit shutter B.
8.3. Discharge cycles
In the PLC four different operating cycles are set, which are selectable by pressing the
suitable key in the display of the electric panel (see § 7.1):

Program n° 1 - separation cycle with partial discharges;

Program n° 2 - separation cycle with total discharges;

Program n° 3 - separation cycle with partial discharges and total discharges;

Program n° 4 - washing cycle with partial discharges.
ATTENTION
The choice of the operating cycle and the setting of the functional parameters
depend upon the product's characteristics, the physical parameters of the process
and the degree of separation required. Always CONTACT the MANUFACTURER
for a suitable choice.
The ejection of the sludges accumulated in the bowl through the partial discharge does not
involve the interruption of the separation process because the opening time of the bowl is
very short (lower than 0.1 sec.); infact, it is made at the nominal speed and without the
interruption of the product’s feeding. The
total discharge causes the total emptying of the
bowl because the opening time of the bowl is higher (ab. 2 sec.) and therefore, before the
discharge, product feeding is interrupted (by the PLC) closing the inlet valve and stopping the
feeding pump.
ATTENTION
The following instructions have an orientative meaning because the adjust of the working
cycle is extremely conditioned by the characteristics of the products and the physical
parameters of the process (capacity, temperature, viscosity, density, etc.).
a) For a product with a high content of solids (greater than 1

2 % approx.) we recommend a
separation cycle with total discharges (Prog n°2). The separation time may be calculated in
a first rate by following the procedure indicated here below:
Example
Process data Capacity 2.500 l/h
Content of solids in the inlet 7 %
Content of solids desired in the output 2 %