Procurement personnel often encounter incomplete parameter tables, unclear material specifications, and abnormal insulation after shutdown during inquiries. The following points are for reference.
Before selection, the flow rates, inlet and outlet temperatures, and allowable pressure drops for both hot and cold sides must be specified. If any data is missing, the required number of plates and flow arrangement cannot be calculated. For heat exchange between clean or lightly fouled liquids and gases, such as hydraulic oil cooling, domestic hot water preparation, and process fluid heat recovery, this model can be given priority.
After the equipment has been out of service for a period, the insulation resistance should be measured. If it is below the specified value, it can be dried in an oven at about 200°C, or heated by energizing at reduced voltage, until the insulation resistance recovers. After treatment, retest to confirm before putting it back into operation.
The materials of the plates and gaskets should be determined based on the corrosiveness of the medium, and should not be chosen solely by price. When selecting, provide the medium name, concentration, and temperature range to facilitate compatibility assessment.
The port orientation should be checked against the piping layout to avoid on-site rework. During operation, monitor pressure drop changes, and arrange inspection and cleaning when abnormal increases occur.
