Plate heat exchangers are widely used due to their high heat exchange efficiency, low heat loss, compact and lightweight structure, small footprint, long service life, etc. However, it is inevitable that some problems will occur in the process of use. 

Let me share with you how to deal with common failures of plate heat exchangers.

Common faults generally include: 1. External leakage, which mainly manifests as leakage and leakage. 

2. Stranded liquid, the main feature is that the medium on the higher pressure side is strung into the medium on the lower pressure side, and abnormal pressure and temperature will appear in the system. 

If the medium is corrosive, it may also cause corrosion of the gasket of the plate heat exchanger. 

3. The heating temperature cannot meet the requirements. The main feature is that the outlet temperature is low, which does not meet the design requirements.

How to deal with these problems? 

1. Leakage: ? In the no-pressure state, re-clamp the equipment, the size should be uniform, and the deviation of the compaction size should not exceed ±0.2N (mm) (N. is the total number of plates), between the two compaction plates 

The parallelism should be kept within 2 mm. 

? Mark the leaking parts, then disassemble the heat exchanger and investigate and solve them one by one, re-assemble or replace the gaskets and plates. 

?After inspection, repair or replace the deformed part of the plate. 

When there is no plate spare part, the plate at the deformed part can be temporarily removed and then reassembled for use. 

? When reassembling the disassembled plates, clean the plate surface to prevent dirt from adhering to the gasket sealing surface. 

2. Liquid string: ? Replace the cracked or perforated plate, and use the light transmission method to find the crack on the plate. 

?Adjust the operating parameters to meet the design conditions. 

?The clamping size of the heat exchanger should meet the requirements during maintenance and assembly, not as small as possible. 

?The plate heat exchanger plate materials are reasonably matched. 

3. The heating temperature cannot meet the requirements. ? Increase the flow of the heat source or increase the diameter of the heat source medium pipeline. 

? Balance the flow of multiple plate heat exchangers operating in parallel. 

? Disassemble the plate heat exchanger to clean the surface of the plate fouling.

If you still have questions that you don’t understand, you are welcome to call Qingdao Ripter, and our engineers will give you a satisfactory answer for any incurable problems about plate heat exchangers.