6.1.7 specifies a minimum vacuum pump capacity of 850 L/min which is considered overly restrictive. Surveys of equipment suppliers indicate that vacuum pumps which deliver a minimum of 85 L/min are suitable for this application and it is possible that the original text is a typo. The requirement for the vacuum pump is stated in 6.1.7 as capable of maintaining the pressure constant within 1 % over the full range of operating pressures. This standard is also due for review for reapproval. The precision has been reviewed and is valid for this application.
atmospheric equivalent temperature (AET); boiling range; distillation; vacuum distillation
Citing ASTM Standards
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