It will be one of the products featured at HRS Heat Exchangers' PACK EXPO Connects virtual booth.
HRS produces both a three- and four-tube version of the AS Series (the AS 3 and AS 4) to facilitate different arrangements and couplings of service fluid. The thicker wall on the AS 4 series means that up to 25 bar of pressure can be achieved as standard on the product side, but for some applications even higher pressures are required.
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One common example is the sterilization of tomato puree using multiple heat exchanger modules. Because of its viscous nature and the number of heat exchanger modules that may be involved in large-scale treatment (sometimes as many as 20 or 30 elements), the product needs to be pumped at considerable pressure. The physical properties of such fruit purees mean that this high-pressure handling does not adversely affect the quality of the product.
For such applications, HRS offers a high-pressure version of the AS Series. This includes thicker tube walls around the product, while the service fluid (usually water or steam) remains at standard pressures of around 10 bar. The design means that process pressures of up to 150 bar can be accommodated on the product side of the heat exchanger, making it ideal for applications such as pasteurizing and sterilizing tomato and strawberry purees.