Semi-Welded Plate Heat Exchanger

(3 customer reviews)

Semi-welded Plate Heat Exchangers are commonly used as evaporators, condensers, desuperheaters, or oil coolers and are designed for heating and cooling aggressive material. It also works with a wide range of refrigerants and is especially well-suited to ammonia-based applications. Semi-welded heat exchangers are employed in both organic and inorganic chemical processing where the chemicals used limit the kind of gaskets that may be used, or when the required design pressure makes fully-gasketed PHEs or traditional rubber seal heat exchangers unsuitable. We have build each heat exchanger to your exact specifications, ensuring a long-lasting solution that can endure harsh circumstances while reducing the risk of chemicals or refrigerants.



In comparison to all-welded heat exchangers, our semi-welded plate heat exchangers have high thermal efficiency and low running cost. Instead of ordinary plates, the semi-welded product range employs cassette technology for greater safety. Two corrugated plates are stacked on top of each other and laser fused together as a cassette along the sealing groove created for the semi-welded PHE gasket.

For aggressive media, we specially offer a semi-welded plate for PHE. To make the plate cassette, two pieces of PHE stainless steel plates are welded back to back using a laser along the sealing groove for the gasket. The ordinary media side of each cassette is gasketed, while the aggressive media side is welded. A unique, damage-resistant ring gasket is mounted on the welded side. Only two of the four-ring gaskets at the inlet and outlet are contacted as the refrigerant flows from one cassette to the next. Our semi-welded plate heat exchangers have a long product lifetime and ensure safe operation with less danger of leakage thanks to a significant reduction in exposed gasket area.

Applications of Semi-welded Plate Heat Exchangers:

  • Chemical industry
  • Food & beverage Sector
  • HVAC Sector
  • Marine Sector
  • Mining Sector
  • Paper & Pulp Sector
  • Petrochemical Sector
  • Refrigeration Sector
  • Sugar Sector

Additional information

Plate material

0.5/0.6 mm AISI (316L)

Design pressure

10 to 30 bar

Gasket material

Nitril, Viton, Neoprene, EPDM, or Chloroprene


Rubber lined and Stainless Steel


Studded port, flange

Working temperatures

-38℃ to 200℃


All sizes available, as per customer’s requirement


100 kg – 1000 kg



Flow range

20 to 1000 cubic meters/hr

Semi-Welded Plate Heat Exchanger FAQs

Techtrans Engineers are specialists in multi-brands Plate Heat exchangers along with the stockiest of various Plate heat exchanger spares. We also offer customization services to our clients and deliver accordingly, based on their specific needs.

On one hand, it’s easy to maintain, and on the other, it’s capable of transporting more intense fluids. Because it has a low risk of fluid loss, the semi-welded heat exchanger is an excellent choice for transporting expensive materials.

Techtrans Engineers are the leading manufacturer, trader and service provider of semi-welded heat exchanger manufacturers in India. You can be living in any place in India, be it Pune, Ahmedabad, Chennai, Vadodara, Mumbai, or Coimbatore. You can reach out to us at any time and place your quote.


3 reviews for Semi-Welded Plate Heat Exchanger

  1. Duleep Gupta

    I have been using their semi-welded heat exchanger for in my plant 2 years now and they have always sent an expert to troubleshoot the problem. Five stars for the same reason.

  2. Jaspreet Singh

    I found about their semi-welded plate heat exchanger plates that employ advanced laser welding technology, which offers low welding deformation, low residual stress, and comparably of good quality. Also their technicians help whenever needed. One of the best plate heat exchanger manufacturers in Delhi.

  3. Elsie

    Thermal and mechanical tests have confirmed the design of the semi-welded plate heat exchanger. Great product!

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