Straight Brush Seal
Our Straight Brush Seal is a streamlined version of traditional brush seals. The bristles are straight rather than tilted, maintaining a micro-gap seal with soft rotor contact. Its design matches the footprint of a traditional labyrinth seal, allowing direct installation without structural changes. Ideal for compact, older turbine units.
- Product Introduction
Technical Parameters
|
Parameter |
Value |
|
Product Name |
Straight Brush Seal |
|
Applicable Medium |
Saturated steam, superheated steam |
|
Operating Temperature |
-50°C – 650°C |
|
Operating Pressure |
≤ 12 MPa |
|
Brush Material |
Nickel-based superalloy, cobalt-based alloy |
|
Brush Wire Diameter |
0.05 – 0.12 mm |
|
Brush Density |
80 – 120 bristles/mm² |
|
Brush Height |
1.5 – 3.0 mm |
|
Radial Back-off Amount |
1.2 – 2.0 mm |
|
Leakage Rate |
60% – 90% lower than traditional labyrinth seal |
|
Service Life |
≥ 48,000 hours continuous operation |
Key Advantages
1. Simplified Design for Tight Spaces
Our Straight Brush Seal is a streamlined version of traditional brush seals. The bristles are straight rather than tilted, maintaining a micro-gap seal with soft rotor contact. Its design matches the footprint of a traditional labyrinth seal, allowing direct installation without structural changes. Ideal for compact, older turbine units.
2. Soft Bristles Protect the Rotor
Flexible bristles bend back when the rotor expands or passes critical speed, providing a radial back-off of 1.2 to 2.0 mm. This exceeds the safety gap of many rigid seals, ensuring both efficiency and rotor protection. High-temperature nickel-based superalloy bristles resist oxidation and maintain performance under extreme conditions.
3. High-Density Bristles for Minimal Leakage
Precision manufacturing with automated bristle arranging and rolling riveting ensures high bristle density, preventing detachment. With 80–120 bristles per square millimeter, leakage is reduced by 60%–90% compared to conventional labyrinth seals. Designed for -50°C to 650°C and up to 12 MPa, the Straight Brush Seal delivers long-lasting performance with a service life exceeding 48,000 hours.
FAQ
Works for both saturated and superheated steam. Over 200 successful installations in China. Custom dimensions available to fit specific units.
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