The specialist in the production of fully welded plate heat exchangers has been a reliable partner for the whole world for more than thirty years
We have experience with more than 25.000 of installations in demanding operations

Many years of experience with the supply of heat exchangers for our domestic and foreign customers obliges us to produce quality products that meet the strictest requirements. We supply heat exchangers all over the world with the help of our business partners, who sell our products under the name SIGMAWIG.

The body of the exchanger is made from one material (without sealing, without soldering)

- high working temperatures exceeding up to + 300°C

- high working pressures exceeding up to + 30 bar

- high corrosion resistance

More info

We carry out research and development of our own products

We are currently about to complete the testing of completely newly developed all-welded plate bodies with greater heat transfer efficiency and lower pressure losses (T3 and T12).

More info

Environmentally friendly and fully recyclable product

We use only proven and high-quality materials in the production of our all-welded heat exchangers. We do not use any chemicals or consumables needed to solder the exchangers, nor any oil substances.

More info

No need for service, long service life - even over 20 years

Thanks to special welding technology, our heat exchangers require virtually no service or downtime due to the need to replace the plates or seals at the end of their service life. We know from experience that our products, when used correctly, will last in operation for more than twenty years.

More info

Česky English


We are the largest European manufacturer offully welded plate heat exchangers without any additional material


  • welding is performed by the TIG method without the use of additional material and thanks to this exchanger meets the strict testing criteria for corrosion resistance and tightenss
  • we most often use austenitic steel (DIN 1.4404), superaustenitic steel (DIN 1.4539 and 254 SMO), nickel alloys (Hastelloy C-276) or titanium (DIN3.7025) or tantalum for the production of heat exchangers
  • long service life in operation for more than 20 years
  • much higher safety and durability compared to brazed or demountable heat exchangers during operation close to highly hazardous and aggressive media in critical operating conditions
  • possibility of using cocurrent or countercurrent flow of media with operating temperature up to + 300°C or pressure up to 30 bar
  • thanks to a wide choice of different types of plates and sizes, the exchanger can be designed according to the application and needs of the customer
  • small volume of media in the exchanger together with various types of heat exchange plates ensures the most efficient heat transfer with minimal pressure loss
  • compared to other heat exchangers of competitors of the "bloc" or "shell & tube" type, our fully welded heat exchangers are smaller, lighter and much more efficient with minimal demands on the installed proctor
  • we carry out continuous research and development often in cooperation with our long-term German partner API Schmidt Bretten
  • our heat exchangers have minimal maintenance requirements, practically require no service and thanks to their easy connection to the pipeline can be chemically cleaned by flow at any time
  • our products are environmentally friendly and fully recyclable


  • for the regulation of chemical and reaction processes
  • for tempering of highly chemical aggressive products in the chemical, pharmaceutical or petrochemical industries
  • for industrial cooling, tempering or heating of required media
  • for hot water stations
  • for recuperation in chemical or refining processes
  • for steam units
  • for evaporators or condensers
  • for DHW transfer stations
  • for coolers and heaters in food technology or beverage lines
  • for geothermal heating and the use of its waste heat
  • for operations with a requirement for minimum maintenance, service or shutdown of the heat exchanger
  • for operations requiring guaranteed tightness of heat exchangers – e.g. evaporators and refrigerant condensers where there must be no leakage from the cooling circuit (we perform helium tightness tests)
  • for environments or operations with higher risk where there is a requirement for a compact more robust design or safety with maximum heat transfer or minimum pressure loss

Who we are

At TENEZ a.s., we manufacture welded heat exchangers without additional material and demountable heat exchangers with seals. We are one of the largest European manufacturers in our field.

The century-old tradition of our engineering company predetermines our exchangers for the European and global market. We supply heat exchangers to the chemical, pharmaceutical, food and energy industries. We are constantly working on development and research. In more than 30 years, we have successfully implemented over 25,000 projects and we have more than 200 satisfied customers.

See more information


A few interesting numbers

ikona> 30 years of experience with production of heat exchangers
ikona> 25 ths. successfully implemented projects
ikona> 50 types of heat exchangers we are able to produce


Major international and Czech manufacturing companies have long relied on the quality of our work.