Introduction
A Semi Welded Plate Heat Exchanger is a heat transfer device that uses plates and gaskets to transfer heat betweentwo fluids. The semi-welded design is where the plate pack is partially welded to the frame, which strengthens the plate pack and helps prevent leakage. The semi-welded plate design is particularly valuable when dealing with fluidsthat are corrosive or when dealing with fluids that require a high-pressure drop. In this article, we will discuss in detailthe various aspects of Semi Welded Plate Heat Exchangers, including its introduction, market players, and applications. Market Players for Semi Welded Plate Heat Exchanger Several market players are involved in the manufacturing and distribution of semi-welded plate heat exchangers.


Some of the notable ones include:
1. Alfa Laval - Alfa Laval is a Swedish company that manufactures and supplies heat exchangers for various industries. The company's semi-welded plate heat exchangers are reliable, efficient, and designed to handle a wide range of applications.
2. Kelvion - Kelvion is a German company that specializes in heat exchangers, air coolers, and other types of heat transfer equipment. The company's semi-welded plate heat exchangers are designed to increase durability and thermal efficiency while reducing leakage.
3. Tranter - Tranter is a US-based company that manufactures and supplies plate heat exchangers for various industries. Tranter's semi-welded plate heat exchangers are designed to handle high-pressure and corrosive fluids,making them ideal for industrial and chemical applications.
4. SWEP - SWEP is a Swedish company that specializes in the manufacture of brazed plate heat exchangers and semi-welded plate heat exchangers.The company's semi-welded plate heat exchangers are designed to handle a variety of applications, including HVAC, refrigeration, and process systems.

Applications of Semi Welded Plate Heat Exchanger Semi-welded plate heat exchangers are used in a variety of industries and applications, including:
1. Chemical Industry - In the chemical industry, semi-welded plate heat exchangers are used for heat recovery, cooling,and condensation of various chemicals.
2. HVAC Systems - In HVAC systems, semi-welded plate heat exchangers are used for heat recovery, heat exchange,and cooling for buildings of all types and sizes.
3. Refrigeration Systems - In refrigeration systems, semi-welded plate heat exchangers help transfer heat betweenrefrigerants and other fluids, allowing for efficient cooling.
4. Food and Beverage Industry - In the food and beverage industry, semi-welded plate heat exchangers are used forcooling and heating of fluids, and for the pasteurization of juices, milk, and other products.

Conclusion Semi-welded plate heat exchangers are an essential component of several industries, including the chemical, HVAC, refrigeration, and food and beverage industries. The reliability and versatility of the semi-welded plate heat exchangerdesign make them an ideal choice for applications that require high thermal efficiency, resistance to corrosion, and theability to handle high-pressure fluids. With several market players involved in designing, manufacturing, and distributing semi-welded plate heat exchangers, it is easy to find a solution that fits the specific needs of any industryor application.

Shineheat Industrial semi-welded line is used when gaskets are not suitable for one of the process media. Also, the semi-welded line can take a higher design pressure compared to fully gasketed plate-and-frame heat exchangers.

Shineheat Industrialsemi-welded line handles most refrigerants and is particularly suitable for applications involving ammonia. Semi-welded heat exchangers are used in both organic and inorganic chemical processing when the chemicals involved limit the selection of gaskets that can be used or when the required design pressure makes fully gasketed plate-and-frame heat exchangers insufficient.

How it works

The heat transfer area of a gasketed plate-and-frame heat exchanger consists of a series of corrugated plates, assembled between the frame and pressure plates, which retain the design pressure. For the highest thermal performance and to enable a very close temperature approach, fluids normally run counter-currently through the heat exchanger.

The sealing between the plates on the Industrial semi-welded line alternates between laser welds and gaskets. The laser welded channel allows use of fluids that are not compatible with normal gaskets and also allows for higher design pressure than fully gasketed plate-and-frame heat exchangers. 

Shineheat semi-welded Plate Heat Exchanger is available with various pressing depths and angles of the chevron pattern and various shapes of the corrugation which are carefully designed and calculated to achieve optimal performance. The Counter Flow and the chocolate pattern distribution area are two design features available that ensure fluids are evenly distributed across the entire plate.  The result is that the entire heat transfer surface is fully utilized and stagnant zones that can result in fouling are avoided.

High flow turbulence between plates results in higher heat transfer; however, the consequence is pressure drop. Our thermal design engineers will help you design and select the model and configuration that is suitable for your application needs while delivering maximum thermal performance and minimizing pressure drop.

Shineheat semi-welded line can be configured in many ways. The animation shows single pass configuration of a fully gasketed plate-and-frame heat exchanger. The flow principle of a semi-welded heat exchanger is the same. The difference is that every second channel is sealed with a laser weld instead of a gasket. Multi pass with 2 or more passes on each side is also possible.






Benefits for Semi Welded Plate Heat Exchanger

High Thermal Efficiency, Low Operating Cost compared with All Welded Heat Exchanger;
Fexible Combination, transfer area can be modified;
Easy to Install, Compact design;
Convenient for Service and Maintenance, easy to open and clean;
Plate and Gasket Design is 100% replacement for "M6-W, M10-W, MK15-W, M20MW, TK20-W"




Auto Laser Welding Facilities for Semi Welded Plates







For Semi Welded Plate Cassettes, it is implemented by Laser Welding, and the Air Tightness Test is also implemented even for Single Cassette delivery.




Service Plate and Gaskets for Semi-Welded Plate Heat Exchanger


Pair of Plate is Welded By Laser, so the mini thickness of Plate is 0.6mm. The Semi-Welded Plate and Gasket models are Interchangable for "AL"

The Applicable Plate Material
SS304/SS316,254,C276, C2000, Ti/Ni


The Applicable Gasket Material
For “Field Gasket” NBR, EPDM, FKM
For “Ring Gasket” NBR, EPDM, FKM, PTFE Coating







Air Tightness Test for Semi Welded Plate Cassettes