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ISO 8434-3 (Complete Document)
Revision / Edition: 2ND    Chg:    Date: 07/15/05   Abbreviations Definitions
Active, Most Current
METALLIC TUBE CONNECTIONS FOR FLUID POWER AND GENERAL USE - PART 3: O-RING FACE SEAL CONNECTORS
Published By:International Organization for Standardization (ISO)
Page Count:70
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Description / Abstract Back to Top
This part of ISO 8434 specifies the general and dimensional requirements for the design and performance of O-ring face seal connectors made of steel for tube outside diameters or hose inside diameters of 6 mm through 38 mm, inclusive. These connectors are for use in fluid power and general applications where elastomeric seals can be used to prevent fluid leakage, including leakage caused by variations in assembly procedures. They are intended for the connection of tubes and hose fittings to ports in accordance with ISO 6149-1. (See ISO 12151-1 for related hose fitting specification.)

These connectors provide leakproof, full-flow connections in hydraulic systems operating from a vacuum of 6,5 kPa [0,065 bar 3)] absolute pressure to the working pressures shown in Table 1. Because many factors influence the pressure at which a system performs satisfactorily, these values shall not be understood as guaranteed minimums. For every application, it is recommended that sufficient testing be conducted and reviewed by both the user and manufacturer to ensure that required performance levels are met.

NOTE For use under conditions outside the pressure and/or temperature limits specified, see 5.3.

Both metric and inch tubing can be accommodated by changing the sleeve (see Annex D). In the past, these connectors have been used predominantly with inch tubing. For new and future designs, the use of metric tubing is preferred.

This part of ISO 8434 also specifies a performance and qualification test for O-ring face seal connectors.

3) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1N/mm2.
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