This standard refers to ISO 6149-1982. This standard specifies the type and size of pneumatic air port connection threads. This st

This standard specifies the installation groove dimensions and tolerances of Y-shaped rubber seals for pneumatic valves. This stan

This standard specifies the structural type, size series and tolerance of Y-shaped, combined and E-shaped reciprocating rubber sea

This standard specifies the technical requirements, test methods and inspection rules for silicon carbide sealing rings for mechan

This standard specifies the terms, technical requirements, inspection rules and methods, test methods, etc. of welded metal bellow

This standard specifies the technical requirements, test methods, inspection rules, etc. for welded seal rings for mechanical seal

This standard specifies the test methods for the bulk density, acid loss, impregnation lubricant content, compression rate, elasti

This standard specifies the test equipment, sample requirements, test steps and calculation of test results for testing the densit