Two-pass brazed plate heat exchanger LD235-20L-2S-DN80SS (connections: 6 stainless steel flanges) 0255-0408

Compact Performance in Demanding Conditions

The LD235-20L-2S-DN80SS brazed plate heat exchanger is designed for installations where not only efficient heat transfer but also resistance to high thermal and pressure loads is critical. Thanks to its two-pass construction and the use of stainless steel, this model performs reliably in demanding heating and cooling circuits, operating stably even at temperatures up to 230 °C. Its compact dimensions (788 mm height and 310 mm width) allow installation in spaces with limited room, which is crucial when modernizing existing systems or in tight industrial boiler rooms.

Application and Construction Specifics

The unit belongs to the L-line series, meaning its plates are joined by copper brazing in a vacuum furnace. This method guarantees the tightness of the entire assembly and eliminates the risk of leaks caused by mechanical clearances or gasket aging, as occurs in gasketed heat exchangers. A key element is the optimal shaping of flow channels – engineers struck a balance between low flow resistance and high thermal efficiency. As a result, the working fluid not only exchanges heat rapidly but also avoids depositing contaminants inside the channels, extending the unit's service life and reducing the need for frequent maintenance.

For the installer, the universal mounting capability is also important. The heat exchanger is equipped with six stainless steel flanged connections with a nominal diameter of DN 80 on both sides (primary and secondary). Such large flow openings are essential in systems with high mass flow rates, where traditional threaded connections could become a "bottleneck". It is worth noting that despite the external flanges, technical data also indicate the possibility of connection via external thread (depending on the final configuration), providing flexibility when connecting to various types of valves. The unit is also designed for installation within an insulation jacket, allowing minimization of heat losses directly at the heat exchange source.

Operational Benefits and Durability

By choosing this model, the user gains confidence in operation under extreme working conditions. A maximum working pressure of 30 bar and resistance to temperature fluctuations enable the heat exchanger to cope even in systems with dynamic parameter spikes (e.g., during operation of high-power circulation pumps). The construction material – stainless steel – ensures high corrosion resistance, which is particularly important in installations with hard water or refrigerants aggressive to other metals.

The copper brazing process not only joins the plates but also provides the entire unit with the rigidity necessary for operation under high pressure. Simple installation and potential disassembly (in case of servicing the entire module) result from the device's thoughtful geometry and standard DN 80 connections. The unit features a maximum flow temperature of 230 °C and a working pressure up to 30 bar, making it suitable for systems with high thermal loads. Nominal diameters on both the primary and secondary sides are DN 80, ensuring adequate flow for demanding industrial and commercial applications.

Thanks to this combination of high thermal power with compact dimensions and high mechanical resistance, the LD235-20L-2S-DN80SS heat exchanger becomes a solid foundation for modern liquid-to-liquid heating and cooling installations. It requires no complex maintenance thanks to its sealed construction, and its performance remains constant over years of operation.