When purchasing a plate-and-frame fin heat exchanger, what is easily overlooked is the space for pulling out the frame plates. The equipment needs sufficient clearance to withdraw the plates for cleaning or gasket replacement. If the site is fully occupied by walls or piping, later maintenance will be forced to shut down and dismantle pipes. For the BRF-75 plate-and-frame fin heat exchanger, it is recommended at the selection stage to check the installation space and reserve maintenance distance according to the plate withdrawal direction.
Carbon steel is suitable for general circulating water conditions in HVAC and district heating; stainless steel 304 can be used for medium-temperature heat exchange in chemical processes; when the medium contains chloride ions or acidic components, 316L should be selected. Material selection must be based on actual medium concentration and temperature, and cannot be replaced solely by experience.
Calculate the required heat exchange area based on heat load and inlet/outlet temperature difference, then determine the number of plates in combination with the frame plate specifications. Excessive area margin will increase pressure drop, while too little will fail to achieve the design heat exchange capacity. The matching flange standard and pressure rating must be consistent with the on-site piping to avoid secondary modification.
When replacing sealing gaskets, first confirm that the material is compatible with the medium, and apply a small amount of glycerin before installation to facilitate positioning. Gaskets from different batches should not be mixed to prevent leakage caused by differences in expansion rates.
