Fristam Pumps PM 01, Оригинальное руководство пользователя

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/ / PM POWDER MIXER / / /
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This corresponds to a closing angle of approximately 45%. (The exact value must be de-
termined by the operator.) Through this, an adequate vacuum is generated below the
funnel.
2. Completely open metering valve V1 below the funnel. Check the suction above the fun-
nel and the flow through the sight glass.
Close throttle valve V2 further if necessary to increase the suction.
3. Completely close metering valve V1.
4. Add powder or additional liquid to the funnel.
5. Slowly open metering valve V1.
With swelling products such as pectin or carrageen, proceed with caution to ensure
that the pumps do not become clogged.
6. Open metering valve V1 further as soon as the powder starts flowing well.
7. If necessary, turn on the vibratory motor (if supplied).
7.3 Monitoring Operation
Monitor the quality of the premix through the sight glass. Inspect the air content and the
particle size of the homogenized product.
► Monitor operations: If homogenization is inadequate, close valve V2 further to lower the
throughput and thereby increase the dwell time in the shear pump.
► A decrease in suction power with increasing product stream viscosity can be compensat-
ed for to a certain extent through further opening of throttle valve V2.
► As soon as the powder has been completely drawn out of the funnel and into the prod-
uct, close metering valve V1 so that no air can get sucked into the product.
►
If necessary, add new powder to the funnel. Perform the work steps described in 7.2.2‚
„Mixing,“ again.
7.4 Stopping Powder Mixer
A For shear-sensitive powders, turn off shear pump P2 as soon as the powder has been
completely drawn in.
B For products that are not shear-sensitive, the product can continue to be conveyed
through the circuit for rehomogenization.
7.5 Turning Off Powder Mixer
1. Close the supply system outlet valve.
2. Close throttle valve V2.
3. Open drain valve V3. Collect the draining medium.
4. Turn off the vibratory motor (if supplied).
5. Turn off centrifugal pump P1.
6. Turn off shear pump P2 via the frequency converter (if supplied).
7. Turn off the powder mixer via the shear pump switch.
Damage to Pumps
Damage to mechanical seals by product residues.
► Always clean the powder mixer after turning off.