Circumferential Seal

Our Circumferential Seal eliminates outer-edge leakage in preheaters. Unlike traditional segmented seals that leave gaps, these strips interlock along the preheater’s circumference. Each strip overlaps its neighbor by 8–15 mm, forming a secure, gap-free seal while still allowing thermal expansion.

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Product Introduction

Technical Parameters

Parameter	Value
Product Name	Circumferential Seal
Applicable Equipment	Rotary air preheater
Operating Temperature	-20°C – 420°C
Body Material	Heat-resistant stainless steel, wear-resistant alloy steel plate
Single Strip Thickness	0.8 – 2.0 mm
Circumferential Seal Diameter	Φ6000 – Φ18000 mm (customizable)
Single Strip Overlap	8 – 15 mm
Radial Compensation	6 – 18 mm
Leakage Control Effect	50% – 75% reduction in circumferential leakage
Service Life	3 – 6 years

Key Advantages

1. Interlocking Strips Stop Circumferential Bypass

Our Circumferential Seal eliminates outer-edge leakage in preheaters. Unlike traditional segmented seals that leave gaps, these strips interlock along the preheater's circumference. Each strip overlaps its neighbor by 8–15 mm, forming a secure, gap-free seal while still allowing thermal expansion.

2. No More Air Sneaking Through Gaps

The interlocking design blocks air from bypassing through segment gaps, reducing circumferential leakage by 50%–75%. With no exposed bolts and a close running fit, the seal avoids rigid impacts, providing smooth operation and long-lasting reliability.

3. Custom Fit for Any Diameter

We manufacture Circumferential Seals for preheater diameters from 6 to 18 meters. Heat-resistant alloy plates ensure strength and durability. On-site measurement and installation guidance are provided. The seal directly replaces old strips, simplifying retrofits and minimizing downtime.