The big flake side liner is fitted on both sides of a flake-type chain grate and, together with the grate plates, side seals and clamping plates, forms the edge section of the grate surface. We supply the replacement parts for this position, matched to the original machine’s dimensions.
Edge parts on both sides of the grate
The flake-type (thin-flake) chain grate is one of the most common grate designs in industrial boilers, and its grate surface is a continuous belt formed by interlocking flake grate plates. In the big flake series the plates are larger, so the liners on both sides are correspondingly longer and take on the edge protection. The side liner is not in the middle of the combustion zone, but the integrity of the edge directly affects how smoothly the whole chain belt runs.
Fit with side seals and clamping plates
In the parts breakdown of a flake-type grate, the side seal prevents air bypass, while clamping plates and clips assemble and secure the grate plates. The big flake side liner sits in this area and, together with the side seal and clamping plates, closes off the edge. Replacements are made to OEM dimensions and tolerances, and assembly clearances are controlled according to the original drawings.
Material and applicable temperature
| Material | Temperature resistance | Suitable fuel |
|---|---|---|
| HT200 | 480℃ | Low-calorific coal |
| HT250 | 520℃ | Low-calorific coal |
| RTCr | 550℃ | Low-calorific coal |
| RTCr2 | 600℃ | High-calorific coal, biomass |
| RTSi5 | 800℃ | High-calorific coal, biomass |
| RTCr16 | 900℃ | Various high-calorific coals, biomass |
These grades come from the grate spare parts material system of the partner factory and can be selected to match the material requirements of the original part. The product meets technical standard NB/T 47050-2016.
Information needed for a quotation
Please provide the original drawings or physical dimensions, the series (big flake or small flake), the material grade and the quantity. The partner factory ships, and we can provide selection advice and matching spare parts.




