The BXS-140 brazed stainless steel heat exchanger is designed for parameter verification during procurement. A design pressure of 3.0 MPa and an operating temperature range of -40°C to 200°C serve as the basic boundaries for model selection. The unit adopts an all-welded construction, with plates brazed together, and undergoes pressure and tightness testing before delivery. When comparing quotations, procurement personnel can first confirm working-condition suitability based on these two parameters, then verify connection specifications and heat transfer area.
This model is formed by all-welded construction, with no rubber gaskets involved in medium isolation. The operating temperature range is -40°C to 200°C, and the design pressure is 3.0 MPa. The above parameters are the basic basis for the selection stage; conditions beyond this range must be separately confirmed with the designer. The maintenance characteristic of the all-welded construction is that disassembly conditions are limited. Routine inspection mainly relies on external leakage observation and comparison of operating parameters. During procurement, spare parts lead time and maintenance windows can be included in cost accounting.
In refrigeration systems, this heat exchanger can be used as a condenser or evaporator. A Y-type strainer is recommended on the water side to prevent impurities from entering the plate channels; the oil-side filter accuracy should be no less than 100 μm to avoid particle deposition affecting heat transfer efficiency. Filters are system configuration components and should be listed separately in the procurement list to facilitate price comparison separate from the heat exchanger itself.
The heat transfer margin is recommended to be controlled within the range of 10% to 20%. Too small a margin can easily lead to outlet temperature failing to meet requirements, while too large a margin increases investment and footprint. When reviewing technical agreements, procurement personnel can require the supplier to indicate the design margin value in the parameter table as a basis for horizontal comparison between different quotations.
Before placing an order, it is recommended to verify: whether the design pressure and temperature cover the actual working conditions, whether the water-side and oil-side filtration configurations are implemented, whether the heat transfer margin value is within the recommended range, and whether the connection specifications match the installation space. After confirming the above items one by one, changes in delivery time and costs caused by later modifications can be reduced.
