Semi-welded plate heat exchanger Schmidt® SIGMADUAL

semi-welded plate heat exchanger
semi-welded plate heat exchanger
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semi-welded plate
liquid/liquid, gas/liquid, gas/gas
stainless steel, titanium, nickel
Other characteristics
compact, high-performance, corrosion-resistant, high-temperature, low-pressure, oil cooler, custom, stainless steel, water cooler, gas cooler, sanitary, for corrosive fluids, condensation, seawater resistant, water-cooled, ammonia, high-pressure
for heat pumps, industrial, for the food industry, for the chemical industry, for the petrochemical industry, for hydraulic systems, exhaust gas heat recovery, for marine applications, for the pharmaceutical industry, for refrigeration, for the paper industry, for viscous products, desalination, for wastewater, vaporization, for the food and beverage industry
Operating pressure

Max.: 35 bar (507.63 psi)

Min.: 0 bar (0 psi)


Max.: 200 °C (392 °F)

Min.: -29 °C (-20 °F)


API Heat Transfer SIGMADUAL semi-welded plate heat exchangers feature plates that are welded using advanced laser welding techniques. Two plates are welded together and can be fitted with a Viton® O-Ring and/or Teflon® gasket liner. The resulting plate pack has every other plate fully serviceable, while maintaining integrity of the welded plate pair. This is especially suitable for critical fluids and gases, such as ammonia or caustic process chemicals where fluid loss is not acceptable. In the case of ammonia refrigeration, the reduced volume results in significant savings.


*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.