Semi Welded Plate Heat Exchanger Stainless Steel Heat Exchange Device

• Superior Corrosion Resistance: Adopts high-quality AISI 304/316L stainless steel plates (0.6-0.8mm thickness), which can resist the erosion of acidic, alkaline and other corrosive media, ensuring stable operation in harsh industrial environments and extending service life significantly.
• Perfect Combination of Welded & Gasketed Design: Two plates are welded together to form a cassette, creating a leak-tight barrier for critical or aggressive fluids; the secondary side is sealed with gaskets, allowing easy disassembly, cleaning and maintenance—combining the high pressure resistance of fully welded exchangers and the flexibility of gasketed ones.
• High Heat Transfer Efficiency: Optimized corrugated plate geometry enhances media turbulence, improves heat transfer coefficient, and reduces heat loss. Compared with traditional shell-and-tube heat exchangers, it has a smaller volume but higher heat transfer efficiency, saving installation space and energy consumption.
• Pressure & Temperature Resistance: Designed to withstand pressure up to 460 psig (35 barg) and temperature range from -40°C to 200°C, suitable for high-pressure, high-temperature industrial scenarios such as refrigeration condensation, chemical reaction heating, and waste heat recovery.
• Safe & Leak-Proof: Equipped with high-performance gaskets (NBR, EPDM, Viton®, etc.) and advanced laser welding technology, the welded cassettes ensure no cross-contamination between media, and the double gasket barrier design reduces leakage risks, meeting ASME, PED and other international standards.
• Customizable Design: We provide OEM/ODM services, which can be customized according to your actual needs in terms of plate size, flow rate, connection method (studded port, flange, etc.) and nozzle material, perfectly matching different industrial process requirements.

Our Semi Welded Plate Heat Exchanger (Stainless Steel) is a high-performance heat exchange device integrating the advantages of gasketed and fully welded plate heat exchangers. It is widely used in various industrial fields that require safe, efficient and stable heat transfer. The product adopts cassette chip set technology—two stainless steel plates are laser welded along the sealing groove to form a plate pair, and the plate pairs are sealed with gaskets and clamped between fixed and movable pressure plates, ensuring reliable operation and easy maintenance.

The stainless steel material ensures excellent corrosion resistance and durability, making it suitable for handling aggressive fluids such as sulfuric acid, ethylene oxide, and ammonia, as well as high-purity media in food, pharmaceutical and other industries. Whether it is used as an evaporator, condenser, liquid cooler or heat recovery device, it can exert excellent performance, help enterprises reduce energy consumption and operational costs, and improve production efficiency.

Our stainless steel semi-welded plate heat exchanger is widely used in various industrial sectors, providing efficient and reliable heat transfer solutions for different processes:

• Industrial Refrigeration: Evaporators (flooded or direct expansion), condensers, liquid coolers, chillers, subcoolers, desuperheaters, heat recovery systems and cascade systems, especially suitable for ammonia and CO2 refrigerant applications.
• Chemical Industry: Heat management in reaction processes, cooling systems, condensers, evaporators, heat recovery systems for sulphuric acid, ethylene oxide, ethylene glycol production, and handling of corrosive chemicals.
• Oil & Gas: Compressor coolers, oil coolers, heat recovery in extraction and processing processes.
• Food & Beverage: Pasteurization, sterilization, cooling and heating of food materials, meeting food-grade hygiene standards with stainless steel material and easy cleaning design.
• Pharmaceutical Industry: Heat transfer in drug synthesis, sterilization, and purification processes, ensuring no contamination of high-purity media.
• Other Fields: Wastewater treatment, data centers (direct-to-chip, immersion cooling), metal processing, mining, power generation, energy storage (LDES, ORC systems).

• Professional Manufacturing Experience: With years of experience in heat exchanger R&D and production, we have rich process knowledge to avoid common defects in complex applications and provide reliable high-performance products.
• Strict Quality Control: Each semi-welded plate cassette and fully assembled exchanger undergo thorough helium leak testing before leaving the factory; all materials meet international standards, ensuring product quality and safety.
• Cost-Effective Solution: High heat transfer efficiency reduces energy consumption and operational costs; compact design saves installation space; easy maintenance reduces downtime and maintenance costs.
• 24/7 Technical Support: Our professional technical team provides one-stop services from product selection, customization design to after-sales maintenance, solving your problems in a timely manner.
• Global Supply Capacity: We have factories and distribution networks around the world, supporting fast delivery and timely after-sales service for global customers.

A: A semi-welded plate heat exchanger combines the advantages of both gasketed and fully welded designs. It uses welding cassettes (two plates welded together) to form a leak-tight barrier for critical/aggressive fluids, while the secondary side is sealed with gaskets. Compared with fully gasketed exchangers, it can handle higher pressure and aggressive media; compared with fully welded exchangers, it is easier to disassemble, clean and maintain, and has lower manufacturing costs.

A: Stainless steel (304/316L) has excellent corrosion resistance, which can resist the erosion of acidic, alkaline and other corrosive media, suitable for harsh industrial environments. It also has good high-temperature resistance, wear resistance and hygiene performance, ensuring the stability and service life of the product, and is suitable for food, pharmaceutical and other industries with high hygiene requirements.

A: The choice of gasket material depends on the medium, operating temperature and pressure of your application. NBR gaskets are suitable for general oil and water media; EPDM gaskets are suitable for high-temperature and chemical media; Viton® (FKM) gaskets are suitable for high-temperature, high-pressure and strong corrosive media. Our technical team can help you select the most suitable gasket material according to your specific needs.

A: Yes, we provide full OEM/ODM customization services. We can customize the plate size, material, flow rate, pressure rating, connection method, nozzle material and other parameters according to your actual process requirements, ensuring that the product perfectly matches your application scenario.

A: The gasketed side of the exchanger can be easily disassembled—you only need to remove the fastening bolts and fixed pressure plate to take out the plate pack for inspection and cleaning. For daily maintenance, you can use chemical cleaning (CIP) or mechanical cleaning; the welded side does not need frequent disassembly, only regular leak detection. We will provide a detailed maintenance manual to guide you through the operation.

A: Under normal use and proper maintenance, the service life of the product can reach 8-15 years. The service life is also affected by the operating environment, medium characteristics and maintenance frequency. We provide after-sales maintenance services to help extend the service life of the product.

A: Yes, we provide global after-sales service, including product installation guidance, maintenance training, spare parts supply and fault diagnosis. Our technical team is available 24/7 to answer your questions and solve your problems in a timely manner. We also provide a quality guarantee period to ensure your worry-free use.

A: Our stainless steel semi-welded plate heat exchangers meet international standards such as ASME, PED, ABS, LRS, GL, BV and GOST, ensuring product quality and safety, and can be used in various countries and regions around the world without compatibility issues.

If you have any questions about our semi-welded plate heat exchanger (stainless steel) or need a customized solution, please contact us immediately. Our professional team will reply to you within 12 hours and provide you with a free quote and technical consultation.