2.5″ Butterfly Bleed Air Valve
Butterfly Bleed Air Valve
Also known as:
Bleed Air Valve
2.5″ Butterfly Bleed Air Valve
Butterfly Bleed Air Valve
Also known as:
Bleed Air ValveBuy
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The 2.5″ Butterfly Bleed Air Valve controls compressor air to manage pressure and temperature in smaller or tight-space turbines.Sign in
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Executive Summary
The 2.5″ Butterfly Bleed Air Valve on the LM2500 gas turbine controls the flow of compressed air, known as bleed air, from the compressor. This helps reduce pressure and temperature within the turbine, which is essential for safe and efficient operation.
The valve uses a butterfly-shaped disc that opens and closes quickly, allowing precise control of airflow. Its robust bearing design supports frequent cycles, improving reliability over time.
Designed to fit smaller or space-limited LM2500 turbine setups, this valve can be installed without changes to existing hydraulic or electrical systems. By managing bleed air effectively, it helps protect turbine components from damage and supports consistent turbine performance.
Technical Specifications
| Flange Connections | AS1895/12-250 |
| Function | Compressor bleed regulation |
| Inlet Pressure | 0 to 850 psia max |
| Bleed Air Temperature | 1200°F max |
| Weight | 43 lbs maximum |
| Ambient Temperature | -65°F to 350°F |
| Operating Speed | 320 msec full stroke operation |
| Internal Leakage | 6.0 ppm max at 850 psia |
| Servo Valve | -100 to +60 mA operating current |
| Electrical Connector | M83723 type |
Features and Benefits
- Effective flow area – 2.5 square inches max.
- Butterfly disk permanently joined to the shaft.
- Less than 320 millisecond full stroke response time.
- Bearings designed for dither cycle service.
- Robust bearings shaft design.
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Detailed Description
The 2.5″ Butterfly Bleed Air Valve is a critical component in the LM2500 gas turbine, responsible for regulating the flow of bleed air—compressed air extracted from the turbine’s compressor stage. This valve helps control internal pressures and temperatures, which is essential to maintain safe and efficient turbine operation.
The valve has an effective flow area of 2.5 square inches, allowing it to manage airflow precisely in smaller turbine setups or space-restricted environments. Its butterfly-shaped disc is permanently attached to the shaft, which ensures consistent movement and reliable control of air flow with minimal play or slippage.
One important feature is its fast response time—less than 320 milliseconds to complete a full open or close stroke. This quick action enables the turbine control system to rapidly adjust pressure levels, preventing overheating and reducing mechanical stress on turbine components.
The valve’s bearing shaft is robustly designed to handle frequent small movements, known as dither cycles, without premature wear. The bearings themselves are specifically engineered to support these high-cycle conditions, improving the valve’s durability and lifespan.
By efficiently managing bleed air, this valve helps protect the turbine from excessive pressure build-up and thermal stress, which can otherwise lead to damage or reduced efficiency. Its design also allows installation without requiring changes to the turbine’s hydraulic or electrical systems, making it suitable for retrofits or upgrades on existing LM2500 turbines.
In summary, the 2.5″ Butterfly Bleed Air Valve plays a vital role in controlling compressor bleed air in LM2500 turbines, balancing safety, performance, and durability within compact or smaller turbine applications.
Engineering Data
