Brazed double-pass plate heat exchanger LD235-230-2S-DN80SS (connections: 6 stainless steel flanges) 0255-0148

High Performance in a Compact Housing

This two-pass plate heat exchanger LD235-230-2S-DN80SS is a dedicated solution for installations where efficient heat transfer is critical while maintaining compact dimensions. The application of copper brazing technology under vacuum conditions ensures that each plate is permanently and hermetically sealed to the others, eliminating the risk of refrigerant micro-leaks. Consequently, the construction exhibits high resistance to cyclic pressure and temperature changes, which is invaluable in dynamically operating liquid-to-liquid heating or cooling systems.

The optimal shaping of flow channels is not merely theoretical—it translates into practical benefits during operation. Engineers designed them to achieve a compromise between low flow resistance and maximum heat transfer efficiency. Equally important, this channel geometry hinders the deposition of contaminants inside the unit, resulting in a longer trouble-free operating period and less frequent servicing requirements. This heat exchanger handles extreme operating conditions, withstanding flow temperatures up to 230 °C and a working pressure up to 30 bar.

Application and Installation in Demanding Conditions

The unit is manufactured entirely from stainless steel, ensuring high corrosion resistance even in aggressive chemical environments. The nominal diameter connections DN 80 on both sides (primary and secondary) are equipped with stainless steel flanges, facilitating integration with large-scale industrial or municipal installations. The fact that the connections feature external threads (in accordance with ETIM data for circuits) allows for flexible pipe connections without the need for additional reducers or adapters, should the installation require it.

The unit dimensions are 788 mm in height and 310 mm in width, with a depth of approximately 42 cm. These proportions mean that despite its high thermal power, the heat exchanger occupies relatively little space in the boiler room or technical room. The construction is also adapted for the installation of thermal insulation cladding ("Suitable for insulation cladding: yes"), allowing for the minimization of heat losses and improved energy efficiency of the entire system. Simple installation and potential disassembly facilitate maintenance or modernization work on the system without the need to dismantle the entire piping network.

Key Construction Features and Operating Parameters

The two-pass version of this model (designation "2S") is distinguished by particularly high heat transfer efficiency under more demanding operating parameters than standard single-pass versions. It is an ideal solution where temperature differences between fluids are large or precise control of the energy exchange process is required.

Basic technical data defining the scope of application include construction from stainless steel joined by copper brazing and a maximum operating temperature reaching 230 °C. The unit withstands a maximum allowable pressure up to 30 bar, and the nominal diameter of the connections is DN 80 on both the primary and secondary sides. The connection type is external thread with stainless steel flanges, making it suitable for liquid-to-liquid heating and cooling installations.

Thanks to the use of stainless steel as the main material and the precise brazing process, the device offers long-term reliability even under thermal loads exceeding standard norms for typical aluminum or low-grade steel heat exchangers. It is the choice for installers seeking a "turnkey" solution that requires no additional corrosion protection or complex maintenance procedures during the normal lifecycle of the installation.