SIGMAWIG - All-Welded Plate Heat Exchanger

SIGMAWIG – ALL-WELDED PLATE HEAT EXCHANGERS

Our line of Schmidt SIGMAWIG all-welded plate heat exchangers represents the most compact, rugged and cost-effective means of transferring heat in many demanding industrial applications.

The exchanger features corrugated plates that produce highly turbulent flow in a true counter-current direction. The result is high heat transfer efficiency in a very compact design. Due to the smaller size and reduced material content, welded plate heat exchangers can be the most economical heat transfer choice for your application.

The SIGMAWIG construction makes it possible to noticeably extend the application of plate heat exchangers in respect of new media, temperatures and operating pressures. Especially media with aggressive or environmentally dangerous potential can be controlled with this new gasket-free plate heat exchanger design. TIG welding seams without filler eliminate the risks of leakage
and diffusion. That is why more and more SIGMAWIG are used, where operational dependability is indispensable:

• Suitable for liquids and gases outside of the range of gasketed plate heat exchangers especially in the chemical and pharmaceutical industries
• Control of chemical reaction processes
• Cooling, heating or condensation of solvents
• Cooling and heating of DI-water
• Heat recovery in chemical or refining processes
• Evaporation / condensation of refrigerants

Reliable Heavy-Duty Construction

The heat exchanger design features plates with computer-designed corrugations in a “chevron pattern” that is alternated from plate to plate. This yields a strong, unitized construction. There are two options for incorporating the welded plate pack into the pressure frame. The plate pack openings are joined to the nozzles of the pressure frame or for frequent temperature fluctuation. The sealing between plate pack and pressure frame is ensured by a standard O-ring sealing material like EPDM or by a special high resistant material like Viton or Kalrez. Gaskets common to other technologies are eliminated.

• Suitable for liquids and gases outside of the range of gasketed plate heat exchangers especially in the chemical and pharmaceutical industries
• Available in different sizes: ST 3, ST 12, ST18, ST 30, ST 40
• Compact design with small hold-up volume
• CFD-designed and optimized high performance plate design
• Pressure frame bolted with painted carbon steel or with all welded stainless steel pressure frame
• Operating temperatures up to 250°C
• Operating pressures up to 25 bar

SIGMAWIG ST 3

• All welded stainless steel pressure frame
• Connection size DN 25 (1”)
• Flow rates up to 10 m³/h
• Max. 3 m² heat transfer area per unit

SIGMAWIG ST 12 / ST 18

• Pressure frame bolted with painted carbon steel or with all welded stainless steel pressure frame
• Connection size DN 50 (2”)
• Flow rates up to 35 m³/h
• Max. 25 m² heat transfer area per unit

SIGMAWIG ST 30 / ST 40

• Pressure frame bolted with painted carbon steel or with all welded stainless steel pressure frame
• Connection size DN 150 (6”)
• Flow rates up to 450 m³/h
• Max. 90 m² heat transfer area per unit