1、BRITISH STANDARD BS7403-1: 1998 ISO4548-1: 1997 Full-flow lubricating oil filters for internal combustion engines Part 1: Methods of test for differential pressure/flow characteristics ICS 27.020BS7403-1:1998 This British Standard, having been prepared under the directionof the Engineering SectorBoa
2、rd, was published underthe authority of the Standards Board and comes intoeffect on 15 March1998 BSI 04-1999 ISBN 0 580 29616 4 National foreword This British Standard reproduces verbatim ISO4548-1:1997and implements it as the UK national standard. BS7403-1, together with BS7403-2, BS7403-3 and BS74
3、03-4, supersedes BS4836:1972 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee MCE/21, Filters for gases and liquids, to Subcommittee MCE/21/5, Filters for lubricating oil, which has the responsibility to: aid enquirers to understand the text; present t
4、o the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be
5、obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Fin
6、d” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal
7、 obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pages ii to iv, pages1 to8 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the ame
8、ndment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS 7403-1:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 4548-1 1ii blankBS7403-1:1998 ii BSI 04-1999 Contents Page Foreword iii Introduction 1 1 Scope 1
9、2 Normative references 1 3 Definitions 1 4 Graphical Symbols 1 5 Operational characteristics to be tested 1 6 Filter to be tested 1 6.1 Filter type 1 6.2 Filter element 2 7 Test rig 2 7.1 Sump 2 7.2 Regulating valves 2 7.3 Flow meter 2 7.4 Filter mounting 2 8 Test liquids 2 9 Accuracy of test condit
10、ion measurements 6 10 Test procedure 6 10.1 Test of the complete filter 6 10.2 Test of the filter element 6 11 Report of test results 6 Annex A (informative) Bibliography 8 Figure 1 Diagrammatic arrangement of test rig 3 Figure 2 Typical special test head for spin-on cartridge filters in which the r
11、eplaceable unit does not include a filter head 4 Figure 3 Typical test housing 5 Figure 4 Example of a test report 7 Table 1 Measurement accuracies 6 Descriptors: Internal combustion engines, lubrication systems, oil filters, tests, performance tests, test report sheets.BS7403-1:1998 BSI 04-1999 iii
12、 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 technical committees. Each member body interested in a subject for which a
13、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 with the International Electrotechnical Commission (IEC) on all matter
14、s 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 the member bodies casting a vote. International Standard ISO4548-1was
15、prepared by Technical Committee ISO/TC70, Internal combustion engines, Subcommittee SC7, Tests for lubricating oil filters. This second edition cancels and replaces the first edition (ISO4548-1:1982), which has been technically revised. ISO4548consists of the following parts, under the general title
16、 Methods of test for full-flow lubricating oil filters for internal combustion engines: Part 1: Differential pressure/flow characteristics; Part 2: Element by-pass valve characteristics; Part 3: Resistance to high differential pressure and to elevated temperature; Part 4: Initial particle retention
17、efficiency, life and cumulative efficiency (gravimetric method); Part 5: Cold start simulation and hydraulic pulse durability test; Part 6: Static burst pressure test; Part 7: Vibration fatigue test; Part 9: Inlet and outlet anti-drain valve tests; Part 10: Life and cumulative efficiency in the pres
18、ence of water in oil; Part 11: Self-cleaning filters; Part 12: Particle retention ability and contaminant holding capacity using particle counting. Annex A of this part of ISO4548 is for information only.iv blankBS7403-1:1998 BSI 04-1999 1 Introduction ISO4548 establishes standard test procedures fo
19、r measuring the performance of full-flow lubricating oil filters for internal combustion engines. It has been prepared in separate parts, each part relating to a particular performance characteristic. Together the tests provide the information necessary to assess the characteristics of a filter, but
20、 if agreed between the purchaser and the manufacturer, the tests may be conducted separately. This revision of this part of ISO4548 has been undertaken in order to align the presentation with the requirements of the current ISO Directives. The principal changes are editorial, affecting the layout an
21、d the text. Minor technical changes comprise the inclusion of ISO VG and SAE oil grades for the test liquids, and revision of the test rig dimensions to make them consistent with those specified in ISO3968. In addition, the flow meter on the test rig has been repositioned downstream of the throttle
22、valve. 1 Scope This part of ISO4548 specifies tests for determining the differential pressure/flow characteristics of full-flow lubricating oil filters for internal combustion engines. Tests are specified with oils at two viscosities, one to assess the performance of a filter with a cold oil and the
23、 other to assess its performance with an oil at a typical operating temperature. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO4548. At the time of publication, the editions indicated were valid. All
24、standards are subject to revision and parties to agreement based on this part of ISO4548 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO1219-
25、1:1991, Fluid power systems and components Graphic symbols and circuit diagrams Part1: Graphic symbols. ISO11841-1: 1) , Road vehicles and internal combustion engines Filter vocabulary Part1: Definitions of filters and filter components. ISO11841-2: 1) , Road vehicles and internal combustion engines
26、 Filter vocabulary Part2: Definitions of characteristics of filters and their components. 3 Definitions For the purposes of this part of ISO4548, the definitions given in ISO11841-1and ISO11841-2 apply. 4 Graphical Symbols The graphical symbols used in this part of ISO4548 are in accordance with ISO
27、1219-1. 5 Operational characteristics to be tested A full-flow lubricating oil filter in an internal combustion engine, interposed between the oil pump and the working parts of the engine, necessarily reduces the effective oil pressure available to the engine below the pressure delivered by the pump
28、. In order to ensure an adequate oil pressure to the engine, it is customary for the filter to be designed to pass its full rated flow with no more than a specified differential pressure. The tests specified in this part of ISO4548 measure the differential pressure across a complete filter assembly,
29、 in a clean condition, over the whole range of oil flow rates. The differential pressure across the complete filter is due to the pressure at the inlet and outlet of the filter, including any casting or adaptor which is part of the filter assembly, and at the anti-drain back valve, if one is fitted,
30、 as well as to the differential pressure across the filter element itself. For some purposes, it is necessary to know the differential pressure across the filter alone, for example in assessing the performance of the element in the case of some combinations of filter medium and contaminant. In addit
31、ion to the tests indicated above, the tests specified measure the differential pressure across a clean filter element over the whole range of oil flow rates. 6 Filter to be tested 6.1 Filter type For the purpose of mounting the filter under test in the test rig, the following types of filter are rec
32、ognised: a) spin-on filters in which the replaceable unit does not include a filter head (it may or may not include the element by-pass valve); b) spin-on filters in which the replaceable unit incorporates a filter head that includes the element by-pass valve; 1) To be published.BS7403-1:1998 2 BSI
33、04-1999 c) other filters, usually of the replacement element type and usually including their own filter head. 6.2 Filter element The filter element for the test shall be unused and the test liquid and the test rig shall be clean. For the purposes of this part of ISO4548, the term “clean” means that
34、 there is no detectable increase in differential pressure across a filter of the type under test when the test liquid at the test temperature is circulated through the test rig and the filter, at the rated flow of the filter, for5min. 7 Test rig The test rig is shown diagrammatically in Figure 1. It
35、 shall include the components described in7.1 to7.4, together with the necessary tubing, connectors and supports. 7.1 Sump The sump shall be capable of holding sufficient oil and shall be equipped with a thermostatically controlled heater and cooler capable of maintaining the test temperature. The h
36、eater shall be arranged so that local overheating of the oil is avoided. The by-pass return to the sump and the filter outlet pipe shall terminate below the surface of the oil in the sump when the oil is in circulation. The temperature shall be arranged so that the stipulated viscosity is maintained
37、. 7.2 Regulating valves The regulating valves, 3 and 11, shall be used for the purposes of pressure and flow control. Needle valves of diaphragm type valves are recommended. 7.3 Flow meter The flow meter shall be suitable for use with oils of24mm 2 /s 2)and500mm 2 /s kinematic viscosity and shall re
38、gister the flow in the pipeline leading to the filter. As an alternative, the flow meter may be installed at the filter outlet pipe. A calibrated measuring vessel and stop watch may be used. 7.4 Filter mounting 7.4.1 In the case of the types of filter indicated in6.1 a), a special test head will be
39、required, and a typical example is shown in Figure 2. The differential pressure across the complete filter assembly shall be measured using the pressure tappings marked A and B with C removed. The differential pressure across the filter element shall be measured using an inlet pressure tapping made
40、into the casing surrounding the filter element and the outlet pressure probe marked C. 7.4.2 In the case of the types of filter indicated in6.1 b) and6.1 c), the inlet and outlet pipe bores shall be equivalent to the sizes of the inlet and outlet ports of the filter. Alternatively, the sizes of the
41、inlet and outlet pipes shall be as agreed between the manufacturer and the purchaser of the filter, for example to match the ports in the engine block on which the filter is to be used. Tappings for the measurement of the differential pressure across the complete filter shall be made at five interna
42、l pipe diameters upstream of the filter inlet port and ten internal pipe diameters downstream from the filter outlet port. The inlet and outlet pipes shall be straight and free from obstruction for eight internal pipe diameters upstream and13internal pipe diameters downstream of the filter inlet and
43、 outlet ports. 7.4.3 In the case of the types of filter indicated in6.1 b) and6.1 c), tappings for the measurement of the differential pressure across the filter element shall be made into the test filter in communication with the upstream and downstream sides of the filter element. Wherever practic
44、able these tappings shall be positioned to measure the pressure in locations within the filter where the flow is at a low rate and not turbulent. Alternatively, a special test housing may be used for the measurement of the differential pressure across the filter element; a typical housing is shown i
45、n Figure 3. 8 Test liquids Unless otherwise agreed between the manufacturer and the purchaser of a filter, lubricating oils shall be selected and used in the tests at a suitable temperature to produce kinematic viscosities of24mm 2 /s for simulating general operating conditions and of500mm 2 /s when
46、 simulating cold conditions of operation. The temperature of the oils shall not exceed100C. NOTE 1In order to achieve these viscosities it may be necessary to use two different oils. A viscosity of24mm 2 /s can be achieved with ISOVG100(SAE30) oil (see 1 and 4) at an approximate temperature of74C or
47、 ISOVG150(SAE40) oil at an approximate temperature of83C. A viscosity of500mm 2 /s can be achieved with ISOVG460(SAE140) oil (see 1 and 4) at an approximate temperature of38C. NOTE 2Intermingling of the two designated test oils may take place, particularly when alternating their use in the same test
48、 equipment. The magnitude of the resultant viscosity shift should be closely monitored and compensation made for changes by altering the test temperature or by complete replacement of the test oils. 2) 1mm 2 /s =1cStBS7403-1:1998 BSI 04-1999 3 Figure 1 Diagrammatic arrangement of test rigBS7403-1:19
49、98 4 BSI 04-1999 Figure 2 Typical special test head for spin-on cartridge filters in which thereplaceableunitdoes not include a filter headBS7403-1:1998 BSI 04-1999 5 Figure 3 Typical test housingBS7403-1:1998 6 BSI 04-1999 9 Accuracy of test condition measurements Measurement of the test conditions shall be maintained within the levels of accuracy given in Table 1. Differential pressures shall be measured in kilopascals (kPa). Table 1 Measurement accuracies 10 Test procedure 10.1 Test of the comple
