Plate material, gasket temperature resistance rating, and pass arrangement are the core parameters. Plates are commonly made of 304/316L stainless steel, while titanium is suitable for seawater or chloride-containing media. Gasket material directly affects the operating boundaries: nitrile is suitable for water, mineral oil, and similar media, with a conventional operating temperature of about -20°C to 100°C; beyond this range, EPDM should be selected, as it has good resistance to hot water and steam, with an upper temperature limit of about 150°C; if the medium contains acids, alkalis, or organic solvents, fluororubber should be matched, covering -20°C to 200°C. The pass arrangement determines pressure drop and heat transfer efficiency. A single pass is suitable for high-flow, low-pressure-drop applications, while multiple passes can increase flow velocity but also increase pressure drop, and must be adjusted according to the actual pumping capacity.
The clamping dimension is a key control point for plate-and-frame heat exchanger installation. Each unit is calibrated with a clamping range before leaving the factory, and on site the distance between the clamping plates must be measured with a caliper to ensure the value falls within the calibrated range. Excessive clamping may cause leakage, while insufficient clamping may deform the plates; both will damage the sealing structure. If the measured value deviates from the calibrated range, loosen the clamping bolts and retighten evenly in a diagonal sequence. Do not overtighten on one side.
First clarify the medium composition and concentration. For chloride-containing media, 304 should not be used; 316L or titanium plates should be given priority. Gasket selection requires checking both the upper temperature limit and chemical compatibility. For example, EPDM is selected for hot water conditions, while fluororubber is required for oil-containing solvent conditions. During design, reserve 10% to 15% excess heat transfer area to mitigate efficiency loss caused by fouling, but excessive margin will increase pressure drop, so a trade-off must be made in thermal calculations.
This model has a single-plate heat transfer area of 0.45 square meters, a maximum handling capacity of about 120 cubic meters per hour, and a design pressure of 1.0 MPa. It is suitable for chilled water and cooling water heat exchange in HVAC systems, dilute acid cooling in chemical processes, mineral oil cooling, and waste heat recovery. Before selection, please provide the medium name, inlet and outlet temperatures, flow rate, and allowable pressure drop so that the number of plates and pass arrangement can be calculated.
