1、BRITISH STANDARD BS ISO 5782-2:1997 Pneumatic fluid power Compressed air filters Part 2: Test methods to determine the main characteristics to be included in suppliers literature ICS 23.100.30BSISO5782-2:1997 This British Standard, having been prepared under the directionof the Engineering SectorBoa
2、rd, was published underthe authority of the Standards Board and comes into effect on 15 April 1998 BSI 06-1999 ISBN 0 580 29708 X National foreword This British Standard reproduces verbatim ISO5782-2:1997 and implements it as the UK national standard. The UK participation in its preparation was entr
3、usted to Technical Committee MCE/18, Fluid power systems and components, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed
4、; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in thi
5、s document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. User
6、s of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, page ii, pages 1 and
7、2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO5782-2:1997 BSI 06-1999 i Co
8、ntents Page National foreword Inside front cover Foreword ii Introduction 1 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Units 1 5 Test conditions 1 6 Test procedure to verify rated pressure 1 7 Flow-rate tests 2 8 Useful-retention-capacity measurement of the reservoir 2 Annex A (informative
9、) Bibliography Inside back coverii blankBSISO5782-2:1997 ii BSI 06-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO tech
10、nical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
11、 with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of
12、 the member bodies casting a vote. International Standard ISO5782-2 was prepared by Technical Committee ISO/TC131, Fluid power systems, Subcommittee SC5, Control products and components. ISO 5782 consists of the following parts, under the general title Pneumatic fluid power Compressed air filters: P
13、art 1: Main characteristics to be included in suppliers literature and product-marking requirements; Part 2: Test methods to determine the main characteristics to be included in suppliers literature. Annex A of this part of ISO5782 is for information only. Descriptors: Pneumatic fluid power, compres
14、sed air circuits, fluid filters, air filters, technical data sheets, sets of data, tests, determination, characteristics.BSISO5782-2:1997 BSI 06-1999 1 Introduction In pneumatic fluid power systems, power is transmitted and controlled through air under pressure within a circuit. Where mechanical fil
15、tration of the air media is desired, filters are components designed to remove solid and liquid contaminants from compressed air. 1 Scope This part of ISO5782 specifies tests, procedures and a method of presenting the results concerning the parameters which define the main characteristics to be incl
16、uded in the suppliers literature of filters conforming to ISO5782-1. The scope of this part of ISO5782 is to facilitate the comparison of filters by standardizing test methods and presentation of test data; to assist in the proper application of filters in compressed air systems. The tests specified
17、 are intended to allow comparison between the different type of filters; they are not production tests to be carried out on each filter manufactured. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO5782
18、. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO5782 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO
19、maintain registers of currently valid International Standards. ISO 3:1973, Preferred numbers Series of preferred numbers. ISO 2944:1974, Fluid power systems and components Nominal pressures. ISO 3448:1992, Industrial liquid lubricants ISOviscosity classification. ISO 5598:1985, Fluid power systems a
20、nd components Vocabulary. ISO 5782-1:1997, Pneumatic fluid power Compressed air filters Part 1: Main characteristics to be included in suppliers literature and product-marking requirements. ISO 6358:1989, Pneumatic fluid power Components using compressible fluids Determination of flow-rate character
21、istics. 3 Definitions For the purposes of this part of ISO5782, the definitions given in ISO5598 and ISO5782-1 apply. 4 Units Units from ISO1000 are generally used in pneumatic fluid power systems, in particular: gauge pressure, expressed in kilopascals (bars); temperature, expressed in degrees Cels
22、ius; flow rate, expressed in cubic decimetres per second (ANR). 5 Test conditions 5.1 Temperature The temperature of the processed air, the equipment and the ambient air temperature shall be maintained at25C 10C for all tests. 5.2 Pressures The specified pressures shall be held to within 2%. The pre
23、ferred test pressures are those given in 4.2.1 of ISO5782-1:1997 or in ISO2944. Where other test pressures are required, the values shall be chosen from series R5 of preferred numbers, according to ISO3. 6 Test procedure to verify rated pressure 6.1 Perform this test on three random samples with a p
24、roposed rated pressure for the product. 6.2 In this test, the product-sealing means can be modified to prevent leakage and allow structural failure to occur; but modifications must not increase the structural strength of the pressure-containing envelope. 6.3 Fill samples with a liquid of viscosity t
25、hat does not exceed ISOVG32, according to ISO3448, and install them in the temperature environment described in5.1. 6.4 After stabilizing the temperature, pressurize slowly to a level of1,5times the proposed rated pressure. Hold at this level for2min and observe for leakage or failure (as defined in
26、6.6). 6.5 If there is no leakage or failure, increase the pressure by approximately half of its proposed rating. Hold at this pressure for 2min and observe for leakage or failure (as defined in6.6).BSISO5782-2:1997 2 BSI 06-1999 If there is still no leakage or failure, in terms of the following unit
27、s: a) units constructed of light alloys, brass and steel, continue raising the pressure as above until a level of 4 times the proposed rated pressure has been reached; b) units constructed of zinc diecast alloys or plastics, operating temperatures up to50C, continue raising the pressure as above unt
28、il a level of4times the proposed rated pressure has been reached, operating temperature between50C and80C, continue raising the pressure as above until a level of5times the proposed rated pressure has been reached. 6.6 Criteria for a failure are a fracture, a separation of parts or a crack, or any p
29、henomenon which can pass liquid across the pressure-containing envelope sufficiently to wet the outer surface. Leakage across the port threads may not constitute a failure unless caused by a fracture or crack. 6.7 The proposed rated pressure will be verified if all three samples pass the test. 6.8 W
30、here a unit or sub-assembly in the unit (e.g reservoir/sight-glass) is constructed of different materials, the highest appropriate factor should be used. The applied pressure may be restricted to the area of the interface between the different materials. 6.9 Where the design of the pressure-containi
31、ng envelope is covered by a pressure vessel code in the country of sale, the requirements of that code take precedence over the requirements stated in this part of ISO5782. 7 Flow-rate tests 7.1 The test circuit shall comply fully with the one described in ISO6358:1989, Figure 1, Table 3 and5.3. 7.2
32、 The measuring tubes shall comply fully with those described in ISO 6358:1989, Figure 3, Table 4 and5.4 and 5.5. 7.3 Each series of results obtained for a specified test condition shall be recorded as soon as a steady-state condition has been reached. Recording shall be carried out with care and wit
33、h a sufficiently slow period of change in conditions to avoid a drift in the steady-state characteristic. A periodic check shall be made to verify that no pressure intakes of the measuring instruments are blocked by solid or liquid particles. 7.4 Set the inlet pressure to test levels of250kPa;630kPa
34、;1000kPa(2,5bar;6,3bar; 10bar) or apply the rated pressure if different from1000kPa (10bar). Adjust the inlet pressure during the flow-rate test to maintain it constant. 7.5 Begin circulating air through the test circuit, recording flow rate and pressure drop, up to a maximum flow-rate corresponding
35、 to a pressure drop equal to the lesser of80kPa (0,8bar) or20% of the inlet pressure. 7.6 The results shall be presented in accordance with ISO5782-1:1997,4.2.1, Figure 2, recording the size of port and the type of filter element used in the test, or according to Table 1, where the flow at which the
36、 pressure drop is5% of the inlet pressure is tabulated. 8 Useful-retention-capacity measurement of the reservoir 8.1 This test method determines the capacity of a filter reservoir with a manually operated drain and is also applicable to semi-automatic drains. 8.2 Select three random samples of compl
37、ete filters from normal production units, for each size of filter-reservoir element. 8.3 With the drain closed and the filter completely assembled, measure the amount of liquid necessary to fill the reservoir to a point where the liquid touches the bottom extremities of the baffle. Where there is no
38、 baffle, the maximum level of admissible liquid, and the specified volume corresponding to this mark, shall be marked on the reservoir. 8.4 Determine the average for each group of samples. This will be the rated reservoir capacity for the given reservoir/element combination size.BSISO5782-2:1997 BSI
39、 06-1999 Annex A (informative) Bibliography 1 ISO 1000:1992, SI units and recommendations for the use of their multiples and of certain other units.BS ISO 5782-2:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparin
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