Behncke PWT 510 Instrucciones De Operación página 66

Heat exchanger PWT 510 / PWT 910 / Operation
6 Operation
6.1 Operational safety instructions
Basics
The following points must be observed during commissioning and while operating the heat exchanger:
Operating pressure and maximum and minimum temperatures.
See the type plate for the maximum and minimum temperatures, as well as the maximum nominal
pressure. These values must not be exceeded or fallen short of under any circumstances!
Regulation
You must ensure that any regulation valves present are set up correctly.
Pump start-up
The pump (centrifuge) must always be started up with the valves closed.
After that slowly open up the valves to avoid anomalous dynamic loads.
Pressure fluctuations and vibrations
The heat exchanger must not be subjected to pressure surges or vibrations that may be caused by piston
pumps or other equipment.
If they occur, it may lead to fatigue fractures in the plates.
Flow media leakage during start-up
It may be the case that fluids leak during the start-up phase.
This phase ends when the plates and seals have reached operating temperature and the pressure has
equalised throughout the unit.
Non-condensable media
Air (or other non-condensable media) in the heat exchanger reduce the exchange coefficient and increase
pressure loss. That's why the device needs to be vented.
Pressure increase and temperature fluctuations
It must be possible to continuously measure the pressure and temperature during operation. Increasing
pressure losses and reduced heat exchange point to the formation of deposits on the plates. These
deposits must be removed (see chapter 7).
Fluid leakage during operation
See chapter 2.5.
Short-term decommissioning (winter storage)
If the heat exchanger is decommissioned for an extended period, it must be emptied and cleaned. After
emptying and cleaning the heat exchanger, it must be gently opened and the inside covered with a black
plastic foil/fabric to prevent sunlight damaging the seals (this only applies to embossed plates). Before
starting up the heat exchanger again, the correct closing rates are to be verified again (see chapter 3.2).
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IMPORTANT!
Risk of injury due to improper operation!
Improper operation may lead to severe injuries or material damage.
Operate in accordance with the information in this instruction manual
The instructions must be read and understood.