De-Ionized (DI) Water

Southwest Thermal's shell and tube heat exchangers are constructed from high quality materials with a sanitary finish, the ideal solution when cleaning is an essential part of the process. Our designs offer 100% drainable vessels with double tube sheets to guard against product cross contamination when required. The process side connections are sanitary. We offer optional electro polishing to increase sanitary performance and minimize corrosion. 3A certification is available.

  • Multiple Designs: We offer DI Water heat exchangers in shell & tube, tube-in-tube, brazed plate, and plate and frame.
  • Available Materials: Stainless steel, duplex stainless steel, as well as more corrosion-resistant alloys available.
  • High Quality: All models constructed to the highest standards to extend life and provide maximum heat transfer.
  • Efficiency: Offers top-of-the-line heat transfer efficiency for process fluids.
  • Shell and Tube Classic shell and tube units are available in sizes ranging from 2" to 48". Larger custom units also available.
  • Gasket Materials Numerous gasket materials available, including Viton, Silicone, Butyl, and Nitrile (NBR).
Shell & Tube:
Sanitary Applications
  • Evaporators & Condensors
  • Clean-in-Place
  • Stock and Custom Models Available
Shell and Tube
Plate & Frame:
Sanitary Applications
  • Fully Customizable
  • Multiple Materials Available
  • Easy Service and Maintenance
Plate and Frame
Brazed Plate:
Sanitary Applications
  • Compact Form Factor
  • Multiple Materials Available
  • Varous Connections
Embossed Plate
Tube-in-Tube:
Sanitary Applications
  • Fully Customizable
  • High Temperature & Pressure
  • Temperature Crossing
Tube-in-Tube

DI Water Heat Exchangers

Applications

The following is a list of typical processes that require heat exchangers of this type. API or formulated pharmaceuticals, blood, plasma or growth media, WFI, USP, DI, RO and CIP heating /cooling, pure steam generation & condensing, bio kill & waste neutralization, and point of use cooling and/or heating.

Sizes & Materials

Our shell and tube heat exchangers are constructed from high quality materials with a sanitary finish, the ideal solution when cleaning is an essential part of the process. Our designs offer 100% drainable vessels with double tube sheets to guard against product cross contamination. The process sided connections are sanitary. We offer optional electro polishing to increase sanitary performance and minimize corrosion.

We carry DI water shell and tube heat exchangers from 2" to 48" shell diameters up to 65 feet in length. Multiple design styles such as multi-pass, U-tube, straight tube, and double tube sheet units are available. Our construction materials include 304L, 316L, and duplex stainless steels such as 2205, 2507, and Zeron 100. Additionally, corrosion resistant alloys like Hastelloy, Alloy 20, Monel 600, AL-6XN, Titanium and copper-nickel alloys are also available.

Tube-In-Tube

Tube-in-tube heat exchangers can be utilized when fluids contain significant amount of fibers or other suspended particles. This type of exchanger is formed by two concentric tubes which are corrugated to enhance the heat transfer rate and reduce the overall size of the exchanger. Product wetted components are manufactured from 316L stainless steel. Duplex stainless steel materials are available for more aggressive fluids. All areas not in contact with the product are constructed from 304 stainless steel.

Plate Heat Exchangers

We also offer brazed plate heat exchangers available in stainless steel and various alloys to meet the stringent demands of DI water applications. These compact exchangers offer maintenance free operation and allow for very close approach temperatures between fluids at economical pricing.

Common FAQs

Heat exchangers for deionized (DI) water are used to transfer heat between fluids without contaminating the DI water, which is highly pure and free of ions like sodium, calcium, iron, copper, chloride, and sulfate. DI water is used in sensitive applications like pharmaceuticals, electronics manufacturing, and laboratories where contamination could affect product quality. Heat exchangers in these settings ensure temperature regulation of DI water without introducing impurities from other fluids.

DI water without introducing impurities from other fluids. Due to the purity of DI water, these heat exchangers are made from materials resistant to corrosion, such as stainless steel, titanium, or certain polymers, to prevent any leaching of metals or chemicals into the water. A DI water heater is used in processes that require cooling or heating while maintaining the high-quality properties of the DI water. The main function of a deionized water heater is to regulate temperature without compromising the purity of the water, making them important for applications requiring strict cleanliness and thermal management.


DI water heat exchangers are made in different types including shell and tube, tube-in-tube, brazed plate, and plate and frame. DI water heat exchangers provide these advantages for industries that require high purity levels:

  • Maintaining Purity: DI water is highly sensitive to contamination, and these heat exchangers are designed with corrosion-resistant materials (like stainless steel or titanium) to prevent leaching of metals or chemicals into the water, thus maintaining its purity.
  • Thermal Efficiency: These heat exchangers transfer heat, regulating temperature without compromising the quality of the deionized water, which is important in processes like electronics manufacturing and pharmaceutical production.
  • Prevention of Scaling and Corrosion: DI water can be aggressive to certain metals, but it uses materials that resist scaling and corrosion, ensuring longevity and reliable performance over time.
  • Versatility in Sensitive Applications: DI water heat exchangers are essential for semiconductor manufacturing, medical device production, and lab processes, where even minimal contamination can affect product quality or precision.

DI water tanks are used to store and distribute deionized water, which is water that has had its ions removed through deionized water tank exchange to achieve a high level of purity. The primary function of a DI water tank is to ensure the deionized water remains uncontaminated and can be used in processes that require ultra-pure water, like pharmaceuticals, electronics manufacturing, and laboratories. Here's how DI water tanks work:

  • Water Purification: DI water is produced using ion exchange processes that remove positively charged ions like calcium and magnesium, and negatively charged ions such as chloride and sulfate. The deionized water is then stored in a DI water tank for further use.
  • Storage and Contamination Prevention: DI water is highly reactive and can easily become contaminated by absorbing ions from its surroundings. DI water tanks are made of materials resistant to leaching and contamination, like stainless steel, which prevents the water from coming into contact with substances that could degrade its purity.
  • Temperature Control and Circulation: Some DI water tanks are equipped with temperature control systems or recirculation pumps to maintain water quality and prevent stagnation, which could introduce impurities or bacterial growth. Proper circulation ensures DI water remains consistently pure and ready to use.
  • Distribution System: DI water tanks are connected to distribution networks that deliver the purified water to various points of use, like lab equipment, production lines, or industrial processes. These systems are designed to ensure the water remains pure throughout its journey from the tank to the end application.

Deionized (DI) water is used in various industries because of its high purity, and because it's free from ions and minerals that could interfere with sensitive processes. In pharmaceuticals and biotechnology, DI water can prevent contamination and ensure product quality. In electronics manufacturing, it is used to clean components without leaving mineral residues, which could cause short circuits. DI water is also used in laboratories for experiments that require precise, uncontaminated conditions. Its lack of ions also makes it less reactive, minimizing chemical interactions that could alter results in scientific processes or damage delicate equipment in industrial settings.

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