In chemical plants, plate heat exchanger gaskets often show liquid seepage at the edges and hardening or cracking, mostly related to a mismatch between medium composition and gasket material. When selecting, procurement personnel should first verify the complete medium composition, concentration, operating temperature, and whether particulates are present, then determine the plate and gasket materials.
If the intermediate material contains chloride ions or is weakly acidic, the plate material should be determined based on concentration and temperature curves. 304 stainless steel is suitable for general neutral media; 316L offers better corrosion resistance under conditions with a small amount of chloride ions; when chloride ion concentration or temperature is high, titanium may be considered. Before purchasing, require the supplier to provide a material corrosion resistance data sheet and compare it item by item with actual operating conditions.
Nitrile rubber is suitable for oils and general water-based media; EPDM resists weak acids, weak bases, and hot water; fluororubber is suitable for conditions containing chloride ions, weak acids, and higher temperatures. During selection, confirm that the gasket material is compatible with the medium to avoid leakage caused by swelling or hardening.
The BR-95 plate heat exchanger has a single-plate heat transfer area of 0.95 square meters, a design pressure of 1.0 MPa, and an applicable temperature range of -20 to 150 degrees Celsius. Procurement personnel should provide the complete medium composition, concentration, operating temperature, particulate content, flow rate, and pressure drop requirements, and the technical party will calculate the number of plates and flow path arrangement. When the medium contains particulates, the risk of flow channel blockage must be assessed, and pre-filtration should be installed if necessary.
