Alfa Laval HPM M-15, Инструкция по эксплуатации

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7 Commissioning
AL HPM
7.3 Information on working with products
The AL HPM has been designed in particular for mixing solids and fluids. However, the following things also need to be
taken into account to work with the machine successfully:
Powders difficult to dissolve or those that swell extensively and have a tendency to stick may only be added in very small
quantities, because otherwise the machine may become clogged. Always turn on the ball valve under the funnel slowly and
check the intake behaviour at the same time.
Never deposit BIG bags on the modular frame because their weight may damage it.
7.4 Powering up the machine
A minimum fluid volume is required for the machine to function and this has to be introduced into the mixing tank.
Please perform the following operations in the order listed when commissioning the machine:
- close the ball valve underneath the funnel.
- open all the valves in the circulation pipe.
- check via the sight glass in the machine inlet whether the fluid is flowing into the machine automatically. If it is, wait until
the pipe fills.
- Switch the machine on via the frequency converter and pump the fluid in the circuit.
- With the frequency converter, increase the frequency to 60 Hz (see the frequency converter operating instructions).
- If there is no Isomix mixer in the mixing tank, it must be ensured that a back-pressure of approximately 2 bar is built up by
throttling the valve downline of the HPM. Since the valve and the pressure gauge are not part of the supply, the operator
has to install these components.
- Insert the safety mesh in the funnel.
- Introduce powder into the funnel.
- Slowly open the ball valve underneath the funnel.
- With hardly soluble powders, the ball valve should only be opened 10%-15%.
- With easily soluble powders, the ball valve may be opened 100%.
- Make sure that during the powder intake, no air pockets form in the powder, as otherwise, air can be entrained into the
system. Air pockets should be avoided and any that occur should be dislodged immediately (manually).
- After the powder has been drawn in, close the ball valve immediately and only open it again when powder is next added.
Never aspirate air into the system.
- Since the suction power is reduced with increasing viscosity, make sure that the maximum viscosity of 500 cP in the mixer is
not exceeded. (500 cP in the case of Newtonian products).
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