The maintenance strategy for the BR-50 plate-and-frame heat exchanger centers on matching gasket materials to operating conditions and continuously tracking pressure drop data during operation. Compared with shell-and-tube heat exchangers, the plate-and-frame structure is smaller for the same heat transfer area, but the gasket, as a detachable sealing element, directly determines whether the equipment can operate stably.
The selection of gasket material must consider both the medium type and operating temperature. Nitrile gaskets are suitable for media such as water and mineral oil, with a normal operating temperature of about -20°C to 100°C; beyond this range, continued use of nitrile will accelerate gasket aging. EPDM gaskets have good resistance to hot water and steam, with an upper temperature limit of about 150°C, making them suitable for heating or steam conditions. If the medium contains acids, bases, or organic solvents, fluoroelastomer gaskets should be matched, covering -20°C to 200°C with better chemical resistance. Compared with fully welded plate heat exchangers, the BR-50's detachable structure facilitates gasket replacement, but requires selection personnel to accurately understand medium parameters to avoid leakage caused by gasket mismatch.
During daily operation, inlet and outlet temperature and pressure data should be recorded. A significant rise in pressure drop usually indicates scaling on the plate surface. Compared with shell-and-tube heat exchangers, the plate-and-frame flow channels are narrow, making the impact of scaling on pressure drop more sensitive. If pressure drop rises slowly and heat transfer efficiency declines, backflushing can be attempted first; if pressure drop rises rapidly, the plates need to be disassembled and inspected to check whether the gaskets are aged or deformed or whether the flow channels are blocked by foreign matter. During maintenance, attention should be paid to the plate clamping dimension; too tight will crush the gasket, while too loose will easily cause leakage. Compared with similar models, the BR-50 has specific requirements for plate spacing and gasket groove profile; replacement gaskets should be of matching specifications, and gaskets of different materials must not be mixed.
Design and selection personnel should note that once the gasket material is determined, the maximum operating temperature and corrosion resistance boundary of the equipment are defined. If the process medium changes later, the gasket suitability should be re-evaluated rather than merely adjusting operating parameters. Pressure drop monitoring should set a baseline value and be compared regularly to facilitate early detection of scaling or blockage.
