Cosolvent machine requirements

A user chooses Class IIA cosolvent machines for one of two reasons (1) the cosolvent (SA) whose HSPs best match the HSPs of the soil mixture has a flash point < 140°F and there is no SA cosolvent with similar HSPs which has a flash point > 140°F, or (2) the user is required by spedfication to use an SA which happens to have a flash point < 140°F. No user rationally chooses to use an SA or an RA which has a flash point <140°F. That choice is made out of necessity because the solvent "works or is "spedfied." Said another way, the fact that users choose to use the Class II Acosofvent process is a aedible endorsement of the design, functionality, and inherent safety of these solvent deaning machines. 

A third aspect of difference is that multiple heat sources (or sinks) are required with a Class II cosolvent machine, instead of just one with a single-solvent degreaser. 

Despite this concern, some users of Ciass II cosolvent machines do not use chilled brine. Obviously, these users will experience reduced energy costs and required investment, and also experience increased costs of solvent loss. Certainly, chilled brine is not required for effective cleaning. In Table 1.5 is tabulated a comparison of cooling tower performance vs. that of mechanical refrigeration of "brine." The choice between chilled brine and cooling tower water is simply one of optimization. 

Figure 3.29 Comparison of the Energy Requirements for Operating a Class II vs a Class III Cosolvent Machine...

There is a substantial business in producing Class II A cosolvent deaning machines capable of safely cleaning with isopropanol, and to a lesser extent, ethanol (Ref. 3, Chapter 12). The investment required for such machines is justified by the high value of the cleaned objects. 

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See also in sourсe #XX -- [ ]

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