Potrebujeme váš súhlas na využitie jednotlivých dát, aby sa vám okrem iného mohli ukazovať informácie týkajúce sa vašich záujmov. Súhlas udelíte kliknutím na tlačidlo „OK“.
Standard Practice for Determining the Performance of a Filter Medium Employing a Single-Pass, Constant-Rate, Liquid Test (Withdrawn 2002)
Automaticky preložený názov:
Štandardné praktiky pre Určenie pre výkon filtračné média zamestnávajúcej jednopriechodové , konštantný tok , Liquid test ( Withdrawn 2002 )
NORMA vydaná dňa 1.1.1993
Označenie normy: ASTM F795-88(1993)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.1.1993
Kód tovaru: NS-56474
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
Filters/filter procedures, Liquids, Permeability-filters, Pressure testing, Single-pass filter medium, Solid phase materials, performance testing of a filter medium using a single-pass,, constant-rate liquid test, practice,, Flow and flow rate-filters, performance testing of a filter medium usinga single-pass, constant-rate, liquid test, practice,, Particle analysis-filter testing, using a single-pass, constant-rate liquid test, practice,, Performance-filters
1. Scope |
1.1 This practice guides the investigator into designing, and subsequently employing, a test where a feed stream, flowing at a constant rate, makes one pass through the filter medium (that is, the filtrate is not recirculated back to the feed tank). 1.2 The filter medium, held in an appropriate housing, may be a sheet of any sort of "flat stock," such as felt, paper, cloth, membrane, or porous metal. It may be any sort of porous material held in a cartridge, no matter how thick or what shape. But, this practice is not meant for preformed beds of filter aids, because the practice does not address the method of laying down the bed. 1.3 This practice addresses the methods of measuring the permeability of the filter medium, the efficiency with which it separates particles from the feed stream, and life , or capacity (see section on Descriptions of Terms). Expressions of filtration efficiency are derived from any, or all, of three, separate examinations of the liquid streams, that is, turbidity, mass concentration of suspended solids, and particle-size distributions. 1.4 The investigator is here reminded that test results, for a given filter medium, will change with a change in test particles or a change in test liquid, or both. Indeed, test results can change with changes in the temperature of the liquid; and, if the liquid is water, results can change with a change in pH. 1.5 This practice is written with the view that the investigator has already decided what test liquid and test particles will be used to evaluate a given filter medium (or to compare one medium to others). The practice, then, instructs the investigator how to proceed, what to observe, and how to report results. This practice is presented to form the basis from which specific test methods will emerge, where those specific methods actually identify the test particles, the test liquid, and the test equipment. 1.6 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
Posledná aktualizácia: 2024-11-01 (Počet položiek: 2 208 817)
© Copyright 2024 NORMSERVIS s.r.o.