Rotor Post Seals

Rotor post seals seal around the inner post on both the hot and cold ends of the rotors. It is recommended to replace them with the radial seals due to the ease of accessibility. Thermal growth and sector plate locations must be taken into consideration before and during installation.

Basic Materials unless otherwise specified:

• 12 Ga. Corten Seal Body
• A325 Fasteners if necessary

( Rotor post seals are retained by fasteners or weld depending on age and type )

Radial Static Seals

Radial static seals are mounted on the radial sector plates and prevent air/gas from leaking behind the plates. On axial type air heaters, these seals are usually a slip type. This allows the plates to be adjusted or moved as necessary depending on the type and location.

Basic materials include:

• Slip type static seal
• 3/16" Corten shim plate
• 3/8" Corten cover plate
• 3/16" Corten seal plate
• 1/2" Studs & Fasteners
• Non-axial types are typically 12 Ga Corten & welded.

Material & fastener thickness varies depending on type

Axial Static Seals

Axial static seals are found on axial-type units only. They are mounted on the axial plates and prevent air/gas from leaking behind the plates. Axial static seals are typically a slip type that allows the Axial seal plate to be adjusted as necessary.

Basic materials include:

• Slip type static seal
• 3/16" Corten shim plate
• 3/8" Corten cover plate
• 3/16" Corten seal plate
• 1/2" Studs & Fasteners

Material & fastener thickness varies depending on type

Bypass Static Seals

Bypass static seals are the most inaccessible seals in an air heater and are often overlooked. They are installed in axial type units only and are mounted directly behind the axial seal plates. They prevent air/gas from flowing between the seal plates and the ductwork.

Basic Materials unless otherwise specified:

• 18 Ga. Corten seal body
• 1/4" Holding strip.
• 1/2" cap screw or cup pt. is typical but hardware varies.

Seal Tabs

Seal tabs are found in many different locations in the various types of air heaters. They are used anywhere air/gas is bypassing seals, elements, rotor, structures, etc.

Made in a variety of different shapes, sizes and materials depending on application and locations. Typical usage areas are;

• Outer radial seal tabs
• Inner radial seal tabs
• Axial seal tabs
• Circumferential mounting angle seal tabs