1、INTERNATIONAL STANDARD IS0 77504 Second edition 1992-04-O 1 Commercial vehicles - Dimensions of air filter elements - Part 1: Types A and B VBhicules utilitaires - Dimensions des they dif- fer in the bottom end cup design and require differ- ent installation conditions (see annex A). Types A and B a
2、re not interchangeable. The selected sizes specified in tables 1 and 2 are based upon popular elements currently on the mar- ket. This part of IS0 7750 may be used for other air filter applications where no specific standards exist. 2 Dimensions 2.1 Type A - Circular type with stop limitation See fi
3、gure 1 and table 1. For notes on installation, see annex A. 2.2 Type 6 - Circular type without stop limitation See figure 2 and table 2. For notes on installation, see annex A. 3 Designation Example for the designation of a filter element of type A, with dimensions d, = 166 mm, d2 = 86 mm and h, = 3
4、40 mm: Filter element IS0 7750-I - A 166 x 86 x 340 Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 7750-1:1992(E) l- -I Dlrectlon of alr flow A Freegaskethelghtatdl
5、scretlonof manufacturer.dependlngon materlalandshape. Thegasket shall havesuttlclentcompresslonto allow satisfactory fitting; once fltted, It shall provlde a satlsfactorysealdurlngthellfe of the fllter element. B Thegasketshallbelncludedwlthlnthedlameters d once fltted, It shall provlde a satisfacto
6、ry seal during the life of the filter element. 6 The gasket shall be Included wlthln the dlometers d&and d5. C Element and gasket shall be so Jolned as to necessitate the replacement of both parts simultaneously. Figure 2 - Type B Table 2 - Type B Dimensions in millimetres 3 Copyright International
7、Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 7750-1:1992(E) Annex A (informative) Notes on installation Figures A.1 and A.2 show installation situations In figure A.2, for air filter ele
8、ments of type B, the air which are typical for air filter elements of types A filter element is pulled against the upper sealing and B respectively. surface by means of the nut. In figure A.l, for air filter elements of type A, the air filter element is pulled against the stop shoulder and the stop
9、limiting plane by means of the nut. The design of the stop shoulder and stop limiting plane is optional, but it is necessary to ensure that elements from different manufacturers are fully interchangeable -Stop shoulder stop /- llmltatlon -_-_- -1- Nut I- Figure A.1 - Type A installation Stop shoulde
10、r I- -0ptlonal Nut L Figure A.2 - Type B installation Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 7750-1:1992(E) UDC 621.43.038.771 Descriptors: road vehicles, commercial road vehicles. air filters, dimensions, interchangeability. Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
