Engine Valves

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Engine Valves

Bimetallic & Trimetallic Valves

Engine Valves are manufactured to specifications. The bimetallic operation for the engine valves is extremely important. The valves are welded using a friction-welding machine that merges the two pieces of material (Austenitic on the head and Martensitic on the stem). The process gives the valves a higher resistance to withstand the extreme temperatures of the engine. This is especially necessary for the exhaust engine valves, which are always stressed by higher temperatures compared to the intake valves.

The valve seats, especially on the exhaust valves, are subject to a chemical and a mechanical corrosion. For this reason, for the trimetallic valves, Stellite (metal alloy) is welded on the seat of the valve to improve its endurance. The Stellite gives the seat a higher hardness for better resistance to the mechanical stress. The type of Stellite (cobalt base Stellite) used gives the seat a higher resistance to the chemical corrosion. We emphasize on the concentricity of the bottom of the valve to guarantee the perfect adjustment with the insert.

The measurements of the valves are also verified with a laser instrument to ensure its precision.

Engine Model/ ApplicationPart No. In-Take Valve
 Part No. Exhaust
6217S25141S2903
16737M73589M4163
304623354692335470
30542W69887W2522
30665I77385I7739
311616142801360819
31167W80641360819
32089L76821196772
32089L76829L7683
340611523681152367
340812203221220321
350010471841047184
35007E46097E4609
350821025422102529
1674/62S81431S2903
3054, 305613820521382050
3054, 305614568551382050
3054, 305614568551456857
3054, 305610046267W4602
3054, 416B6I02827W4602
3054C17631341763137
3054C22554952255499
3066MHI 320C21284775I7739
3116, 3126N/A1632432
3126E14573901478211
3126E25278011478211
3204, 910, 9539N01809N0185
3304, 330610078601487455
3304, 33062W26218N0875
3306 Gas7W74907W7491
3406E15283801527585
3406E15370231537024
3412C, 3412E, C3216425431642542
3512E21025421944897
416C, 30546I11967W4602
C10, C1219292131337029
C10, C127E95781337029
C1322430282243030
C1325278022243030
C4.430966783096678
C6.429416842941685
C6.633996373096678
C916324421883122
C924183822418383
D315, D3186H30264F0212
D3209H48112M7727
D3421W18181W1819
D3428H19938H1994
D343, D3461P04077E7830
D3537M78178N3723
D379, D398, D3991W86062W3211
G33062W26212W2877
G3406 / 812273531018314
G34084W53742W2443
G3408C21209322120933

* Other part no. not included in the list are available. Please contact your sales representative if you have any questions. Part Numbers are used for reference purposes only

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