Grate Block for Stoker Atmos C15S, C18S

Product detailed description

Grate blocks are essential components in solid fuel boilers, ensuring even combustion and efficient heat transfer. In older Atmos models such as the C15S and C18S, these blocks are positioned along the grate tube to support the fuel bed and facilitate air flow. Installers working on these models will encounter the need for replacement due to wear or damage, particularly in systems where consistent combustion is critical. The Atmos C0021 grate block is specifically suited for models with seven grates, as opposed to newer versions with fewer grates.

During installation, the block is placed on the grate tube and secured using masonry adhesive. The ceramic material is chosen for its thermal resistance and durability under high temperatures. It is important to ensure that the block is correctly aligned and sealed to prevent air leaks and maintain combustion efficiency.

Technical parameters

Length	108mm
Weight	6.394 kg
Code	C0021
Brand	Atmos

The length of 108mm is a key factor in determining compatibility with older Atmos models. This dimension ensures the block fits correctly on the grate tube. The weight of 5.56 kg indicates the density and robustness of the ceramic material, which is important for structural integrity and long-term use.

Installation and connection

The installation process involves positioning the ceramic block on the grate tube and applying masonry adhesive to secure it. It is essential to check the alignment of the block with the existing grate structure to ensure even distribution of fuel and airflow. A common mistake is failing to apply sufficient adhesive, which can lead to misalignment or detachment over time. Installers should also verify that the block is compatible with the specific model and grate configuration, as newer models may require a different block (e.g., C0026 for the updated C18S with five grates).

Compatibility and accessories

This grate block is specifically designed for the older versions of the Atmos C15S, C18S (up to August 2016), and KC16S models. It is not suitable for the newer C18S model with five grates, which requires the C0026 block. The package includes the ceramic block and masonry adhesive for sealing. No additional components are required for installation.

Technical background for designers

The ceramic grate block functions as a structural and thermal support element in the combustion chamber. Its material properties—high thermal resistance and low thermal expansion—allow it to withstand the high temperatures generated during combustion. The block is integrated into the grate system to ensure even fuel distribution and airflow. The number of grates and the block's length are key factors in determining the efficiency of the combustion process. The ceramic material also contributes to the longevity of the block by resisting thermal shock and mechanical wear.

Service and operation

Regular inspection of the grate block is recommended to check for signs of wear, cracking, or misalignment. Any damage can affect combustion efficiency and should be addressed promptly. The masonry adhesive should remain intact and free from cracks. There are no specified service intervals in the brief, but routine checks during boiler maintenance are advisable.

Frequently asked questions

Can the Atmos C0021 be used in newer C18S models with five grates?
No, the C0021 is only suitable for older C18S models with seven grates. The newer C18S requires the C0026 block.

What adhesive is used for sealing the grate block?
The package includes masonry adhesive, specifically suitable for high-temperature applications in stoker systems.

Is the ceramic block installed in both the front and rear sections of the boiler?
Yes, the block is positioned on the grate tube in both the front and rear sections of the C15S, C18S (older version), and KC16S models.

How is the block aligned during installation?
It should be carefully placed on the grate tube and secured with adhesive to ensure even positioning and prevent air leaks.