IS 13050 : 1991 Internal Combustion Engines - Valve Seat Inserts - Specification

1 Scope

1.1 This standard specifies the requirements for different typesof valve seat inserts, shape and dimensional tolerances used inInternal Combustion Engines including automotive engines. Thisstandard covers valve seat inserts up to and including 120 mmoutside diameter.

1.2 This standard covers both finished and semifinished valveseat inserts. The latter will be interference fitted in the counterbore provided in the cylinder head casting and undergo seat cuttingto the size.

1.3 This standard does not cover the semi-finished valve seatinserts which are cast in-situ in aluminium cylinder heads.

2 References

IS 1570 : Part 5 :1985 Schedules for wrought steels:Part 5 Stainless and heat-resisting steels

IS 7494 :1981Steel for valves for internal combustion engines

IS 9321 :1979Material for alloy cast iron valve seat inserts