Valve Seat

Valve seats are a critical engine component because they are the foundation of the valve train.

The seats provide a surface for the valves to seal against when they close so there's no loss of compression or pressure from the combustion chamber. The seats also help cool the valves by conducting heat away from valves into the cylinder head.

The seats also support the valves and determine installed valve height, which affects valve-train geometry and valve lash. The diameter of the seats and the contour of the angles that are machined into the face of the seats also limit how much air the engine can flow at any given valve lift and rpm.

Because of all these factors, the valve seats deserve a lot of attention whether rebuilding a stock engine or building a performance engine.

Valve Seat Inserts

Sr No. Material c Si Mn P S Cr Mo Ni Cu Fe Co V T W
1 PL12MV (OEM) 1.5% to 2.20% 0.8%-1.0% 0.8% to 1.0% 0.04% Max. 0.07% Max. 12%-14% 2%-2.5% 0.5% Max
2 J3 Stellite:SAE J610b 0.02% 0.02% 0.01% 0.29% 0.03% 0.03% 0.13%
3 J 96 0.02% 1.00% Max. 0.29% Balance 8.00% Max 0.15%
4 J 100 0.02% 1.00% Max. 0.29% Balance 8.00% Max 0.10% 0.15%
5 J 120 1.20 %-1.40% 0.30%-0.60% 0.30%-0.60% 3.75%-4.25% 6.00%-7.00% 1.00% Max 0.25% Max Balance 5.00%-6.00%
6 J 120 V 1.20 %-1.50% 0.30%-0.60% 0.30%-0.60% 0.30% Max 0.12% Max 3.50%-4.25% 6.00%-7.00% 1.00% Max Balance 1.30%1 .60% 5.00%-6.00%
7 J 125 1.45% Max 2.10% Max 0.00% 0.20% 0.01% Balance
8 Stellite 2.0%-2.7% 1% 29.0%-33.0% 0.03% 41.30%
9 Valmet 1.5%-2.0% 1.5%-2.0% 13.5%-15.0% 0.35%-0.5%
10 Welltite 2.0%-2.4% 1.5%1.9% 11.0%13.0% 5.0%-7.0% 38.0%-42.0% 0.4%-0.6%
11 Well-Tite Material 1.70%-2.10% 1.75%-2.25% 0.80%1 .20% 0.03% Max 10.0%12.0% 40.0%-42.0% 0.50% Max Balance 1.00% Max 0.9%-1.10% 0.20% Max
12 Mar-Tite Material 1.20%1 .60% 0.50%1.00% 0.04%-0.60% 0.05% Max 0.05% Max 18.0%-21.0% 0.05% Max 1.80%-2.50% 0.03% Max Balance

VALVE SEAT INSERTS | ASIENTOS DE VÁLVULAS | VENTILSITZ-EINSÄTZE

No. PRODUCT RANGE
1 AGRALE
2 ALFA ROMEO
3 ANDORIA
4 AUDI
5 BMC
6 CATERPILLAR
7 CHEVROLET
8 CUMMINS
9 DAF
10 DETROIT
11 DEUTZ
12 FIAT
No. PRODUCT RANGE
13 FORD
14 FRISCH
15 GM
16 HINO
17 HONDA
18 INTER
19 ISUZU
20 IVECO
21 I.H.C NAVISTAR
22 JOHN DEERE
23 K.H.D.
24 KIA
No. PRODUCT RANGE
25 KOMATSU
26 KUBOTA
27 LANCIA
28 MAN
29 MERCEDES
30 MITSUBISHI
31 MAZDA
32 MTU
33 MWM
34 NISSAN
35 PERKINS
36 PEUGEOT
No. PRODUCT RANGE
37 PIAGGIO
38 PIELSTICK
39 RENAULT
40 SCANIA
41 SUZUKI
42 TOYOTA
43 VALMET/VALTRA
44 VOLKSWAGEN
45 VOLVO
46 WARTSILA
47 WAUKESHA
48 YAMAHA
Send us Enquiries

Contact Us

Got a question? We'd love to hear from you. Send us a message and we'll responsd as soon as possible.