1、BRITISH STANDARD BS 7403-3: 1998 ISO 4548-3: 1997 Full-flow lubricating oil filters for internal combustion engines Part 3: Methods of test for resistance to high differential pressure and to elevated temperature ICS 27.020BS7403-3:1998 This British Standard, having been prepared under the direction
2、of the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15 March1998 BSI 04-1999 ISBN 0 580 29614 8 National foreword This British Standard reproduces verbatim ISO4548-3:1997 and implements it as the UK national standard. BS7403-3, together wit
3、h BS7403-1, BS7403-2 and BS7403-4, supersedes BS4836:1972 which is withdrawn.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 u
4、nderstand the text; present to 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
5、 on this subcommittee can be 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
6、 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. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itse
7、lf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theISO title page, pages ii to iv, pages1 to7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This w
8、ill be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS 7403-3:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 4548-3 1ii blankBS7403-3:1998 ii BSI 04-1999 Contents Page Foreword ii
9、i Introduction 1 1 Scope 1 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 1 7 Test rig 1 7.1 Sump 5 7.2 Regulating valves 5 7.3 Flow meter 5 7.4 Filter mounting 5 8 Test liquids
10、5 8.1 Test liquids for test of ability to withstand high differential pressure 5 8.2 Test liquid for test of ability to withstand elevated temperature 5 9 Accuracy of test condition measurements 5 10 Test procedure 5 10.1 Test for ability to withstand high differential pressure 5 10.2 Test for abili
11、ty to withstand elevated temperature 6 11 Report of test results 6 11.1 High differential pressure test 6 11.2 Elevated temperature test 6 Annex A (informative) Bibliography 7 Figure 1 Diagrammatic arrangement of test rig 2 Figure 2 Typical special test head for spin-on cartridge filters in which th
12、e replaceable unit does not include a filter head 3 Figure 3 Typical test housing 4 Table 1 Measurement accuracies 5 Descriptors: Internal combustion engines, lubrication systems, oil filters, tests, performance tests, test report sheets.BS 7403-3:1998 BSI 04-1999 iii Foreword ISO (the International
13、 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 technical committee has been est
14、ablished 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 matters of electrotechnical standardiz
15、ation. 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 ISO4548-3 was prepared by Technical Committee
16、 ISO/TC70, Internal combustion engines, Subcommittee SC7, Tests for lubricating oil filters. This second edition cancels and replaces the first edition (ISO4548-3:1982), which has been technically revised. ISO4548 consists of the following parts, under the general title Methods of test for full-flow
17、 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 efficiency, life and cumulativ
18、e 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 presence of water in oil; Part 11:
19、 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 blankBS 7403-3:1998 BSI 04-1999 1 Introduction ISO4548 establishes standard test procedures for measuring the performance o
20、f 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 if agreed between the purcha
21、ser 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 and the text. Minor technical c
22、hanges comprise the addition of details of a grade of oil to achieve the required viscosity of test liquid for testing the ability of a filter to withstand high differential pressure, and revision of the test rig dimensions to make them consistent with those specified in ISO3968. In addition, the fl
23、ow meter on the test rig has been repositioned downstream of the throttle valve. 1 Scope This part of ISO4548 specifies tests for measuring the resistance to high differential pressure and the resistance to elevated temperatures of filter elements of full-flow lubricating oil filters for internal co
24、mbustion engines. 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 standards are subject to revision and parties to agreement base
25、d 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. ISO 1219-1:1991, Fluid power systems and components Graphic symbols and
26、 circuit diagrams Part1: Graphic symbols. ISO 2942:1994, Hydraulic fluid power Filter elements Verification of fabrication integrity and determination of the first bubble point. ISO 11841-1: 1) , Road vehicles and internal combustion engines Filter vocabulary Part1:Definitions of filters and filter
27、components. ISO 11841-2: 1) , Road vehicles and internal combustion engines 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 ISO11841-1 and ISO11841-2 apply. 4 Graphical symbols Th
28、e graphical symbols used in this part of ISO4548 are in accordance with ISO1219-1. 5 Operational characteristics to be tested Filters can be subjected to high differential pressures in service, particularly as choking takes place with age. They can also be affected by high operating temperatures. Th
29、is test confirms the ability of a filter element to withstand a specified differential pressure without failure following conditioning at a simulated operating temperature. 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
30、 filter are recognised: a) spin-on filters in which the replaceable unit does not include a filter head (it may or may not include an element by-pass valve); b) spin-on filters in which the replaceable unit incorporates a filter head that includes an element by-pass valve; c) other filters, usually
31、of the replacement element type and usually including their own filter head. 6.2 Filter element Prior to the test, and unless it is impractical to dismantle the filter assembly, the integrity of the filter element shall be checked in accordance with ISO2942. 7 Test rig The test rig is shown diagramm
32、atically in Figure 1. It shall include the components described in7.1 to7.4, together with the necessary tubing, connectors and supports. 1) To be published.BS7403-3:1998 2 BSI 04-1999 Figure 1 Diagrammatic arrangement of test rigBS 7403-3:1998 BSI 04-1999 3 Figure 2 Typical special test head for sp
33、in-on cartridge filters in which thereplaceableunitdoes not include a filter headBS7403-3:1998 4 BSI 04-1999 Figure 3 Typical test housingBS 7403-3:1998 BSI 04-1999 5 7.1 Sump The sump shall be capable of holding sufficient oil and shall be equipped with a thermostatically controlled heater and cool
34、er capable of maintaining the test temperature. The heater 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 ar
35、ranged so that the stipulated viscosity is maintained. 7.2 Regulating valves The regulating valves,3 and10, shall be used for the purposes of pressure and flow control. Needle valves or diaphragm type valves are recommended. 7.3 Flow meter The flow meter shall be suitable for use with oil of500mm 2
36、/s 2)kinematic viscosity and shall register the flow in the pipeline leading to the filter. As an alternative, the flow meter may be installed in the filter outlet pipe. 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 required, and a typic
37、al example is shown in Figure 2. The differential pressure across the filter element shall be measured using an inlet pressure tapping made 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), ta
38、ppings 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 practicable these tappings shall be positioned to measure the pressure in locations within the
39、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 in Figure 3. 8 Test liquids 8.1 Test liquids for test of ability to withstand high differ
40、ential pressure A lubricating oil shall be selected and used in the test at a suitable temperature to produce a kinematic viscosity of500 mm 2 /s. The temperature of the oil shall not exceed100C. NOTEA viscosity of500 mm 2 /s can be achieved with ISOVG460 (SAE140) oil (see 1 and3) at an approximate
41、temperature of38C. 8.2 Test liquid for test of ability to withstand elevated temperature Unless otherwise agreed between the manufacturer and the purchaser of a filter, a recognised reference oil 3)shall be used in the test. NOTEThe degree and nature of the embrittlement of a filter element exposed
42、to elevated temperatures may be affected by interaction between the material of the element and the oil with which it is used. It may therefore be desirable to compare this characteristic of filter elements using only the oil with which they are to be used in service. However, the results of such te
43、sts are valid only as a means of comparing filter elements when that oil is used. 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 Me
44、asurement accuracies 10 Test procedure 10.1 Test for ability to withstand high differential pressure NOTEThe test should be-conducted on an unused filter element. 10.1.1 Install the filter under test as shown in Figure 1. 10.1.2 Add the required quantity of clean test liquid (see8.1) to the sump1 an
45、d circulate it through the test rig via the by-pass pipe only. No test liquid shall pass through the filter at this stage. 10.1.3 Switch on the heater or cooler and adjust the thermostat to the required temperature (see8.1). Allow the temperature to become stabilised. 10.1.4 When the temperature of
46、the oil in the sump1 has become stabilised, direct the flow of oil to the filter element and increase the flow until the differential pressure across the element is175kPa. Then increase the flow so that the differential pressure rises in increments of25kPa until it reaches the value350kPa, or such o
47、ther value as is agreed between the manufacturer and the purchaser of the filter. Maintain each differential pressure for1min. 2) 1 mm 2 /s =1 cSt 3) Suitable reference oils include those known as RFO3 in the USA, and M.I.R.A. Reference Oil No.2 in the UK. Condition Accuracy % Differential pressure
48、5 Oil viscosity 5 Oil flow 2BS7403-3:1998 6 BSI 04-1999 Carry out the procedure without exceeding the rated flow of the filter. Unless the required differential pressure can be achieved with clean test fluid, add a quantity of contaminant 4)to the fluid to partially choke the filter element. NOTEThe
49、 quantity of contaminant should be such that it does not influence the strength of the filter element. 10.1.5 Terminate the test before the required differential pressure is reached if the differential pressure ceases to rise with increasing flow or if a sudden decrease of differential pressure is observed. After completion of the test, remove the element from its housing, drain the surplus oil from it, and inspect it for failure (see11.1). Unless the fracture is visibly obvious, test the integrity
