Abrasive materials selection guide
Choosing the right abrasive
The right abrasive depends on the valve seat material and the condition of the seat. The table below gives recommended grit and abrasive material per seat type and seat condition. The choice of material and grit always depends on the seat material and the degree of seat damage. For advice on a specific application, contact the LarsLap team.
| Seat condition | Step | Brass seat — Grit | Brass seat — Material | Stainless steel seat — Grit | Stainless steel seat — Material | Stellite seat — Grit | Stellite seat — Material |
|---|---|---|---|---|---|---|---|
| Poor condition | |||||||
| 1 | 80 | Micron alumina | 60–80 | Diamond, Ceramix | 60–80 | Diamond, Ceramix | |
| 2 | 120 | Silicon (K), Micron alumina | 80 | Micron alumina, Ceramix | 80 | Micron alumina, Ceramix, Diamond | |
| 3 | 180 | Silicon (K), Micron alumina | 120 | Micron alumina, Ceramix | 120 | Micron alumina, Ceramix, Diamond | |
| 4 | 400 | Silicon (K), Micron alumina | 180 | Micron alumina, Ceramix | 180 | Micron alumina, Ceramix | |
| 5 | 400 | Micron alumina, Ceramix | 400 | Micron alumina, Ceramix | |||
| Normal condition | |||||||
| 1 | 80 | Silicon (K), Micron alumina | 80 | Micron alumina, Ceramix | Micron alumina, Ceramix, Diamond | ||
| 2 | 120 | Silicon (K), Micron alumina | 120 | Micron alumina, Ceramix | Micron alumina, Ceramix, Diamond | ||
| 3 | 180 | Silicon (K), Micron alumina | 180 | Micron alumina, Ceramix | Micron alumina, Ceramix | ||
| 4 | 400 | Silicon (K), Micron alumina | 400 | Micron alumina, Ceramix | Micron alumina, Ceramix | ||
| Good condition | |||||||
| 1 | 120 | Silicon (K), Micron alumina | 120 | Micron alumina, Ceramix | 120 | Micron alumina, Ceramix | |
| 2 | 180 | Silicon (K), Micron alumina | 180 | Micron alumina, Ceramix | 180 | Micron alumina, Ceramix | |
| 3 | 400 | Silicon (K), Micron alumina | 400 | Micron alumina, Ceramix | 400 | Micron alumina, Ceramix | |