The core basis for selecting a plate heat exchanger is three parameters: heat load, flow rate, and allowable pressure drop. Taking BR-130 as an example, its effective heat exchange area per plate is approximately 0.13 square meters; plate materials can be 304 or 316L stainless steel or titanium; gaskets are commonly nitrile rubber or EPDM; design pressure is 1.0 to 1.6 MPa; and the applicable temperature range depends on the gasket material. During procurement, this model can be compared with two alternatives: the detachable shell-and-tube heat exchanger and the brazed plate heat exchanger. The shell-and-tube type has higher pressure-bearing capacity but a relatively small heat exchange area per unit volume, while the brazed type is compact but difficult to disassemble for cleaning. BR-130 uses a detachable clamping structure, making it easy to withdraw the plates for cleaning and replace the gaskets, and is suitable for working conditions requiring regular maintenance.
If the cold-side outlet temperature and allowable pressure drop are not provided on site, this is a common situation of incomplete hot-side and cold-side parameters. In this case, it is not advisable to place an order directly based on the nameplate area. Instead, the inlet and outlet temperatures of the hot and cold sides, design flow rates, and medium physical property data should first be completed, and then the heat exchange area and channel arrangement should be calculated. Procurement personnel can require the supplier to issue a selection calculation sheet that specifies the heat exchange area margin and estimated pressure drop, so as to avoid deviation from the design working conditions after commissioning.
If the medium is corrosive, the material corrosion resistance table must be checked to avoid leakage caused by improper selection of plates or gaskets. During operation, it is recommended to check the inlet and outlet temperatures of the hot and cold sides, design flow rates, and allowable pressure drop at shift handover to confirm that the actual working conditions do not exceed the nameplate range. Compared with the fixed tubesheet design, the detachable structure of BR-130 makes cleaning after fouling more convenient. Gaskets are wearing parts and must be inspected and replaced periodically.
