4″ Butterfly Bleed Air Valve
Butterfly Bleed Air Valve
Also known as:
Bleed Air Valve
4″ Butterfly Bleed Air Valve
Butterfly Bleed Air Valve
Also known as:
Bleed Air ValveBuy
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The 4″ Butterfly Bleed Air Valve controls compressor airflow, balancing size and performance for efficient, safe turbine operation in medium-duty settings.Sign in
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Executive Summary
The 4″ butterfly bleed air valve is a compact, high-performance solution for managing bleed air in aero-derivative gas turbines. Using a rotating disc design, it precisely regulates airflow from the turbine’s compressor to control pressure and temperature during operation.
Engineered for reliability, this valve features upgraded components to extend the life of the bearings and disc, addressing common failure points in earlier designs. It is a true plug-and-play replacement—requiring no changes to existing hydraulic or electrical systems—making it ideal for quick integration into LM-series turbine fleets.
Designed for industrial gas turbine applications, the 4″ butterfly bleed air valve helps maintain efficient turbine operation, protects system components, and reduces maintenance downtime.
Technical Specifications
| Function | Compressor bleed regulation |
| Type | Normally Open Hydraulically Actuated Modulating Valve |
| Flange Connection | AS1895 |
| Inlet Pressure | 0 to 550 psia max |
| Bleed Air Temperature | 1200°F max |
| Weight | 46 lbs |
| LVDT | 7.07 ± 0.14 Vrms at 3kHz excitation, -0.435 to 0.435 V/V output |
| Operating Speed | 320 msec full stroke operation |
| Internal Leakage | 6.0 ppm max at 450 psia |
| Servo Valve | -100 to +60 mA operating current |
Features and Benefits
- Robust bearing shaft design
- Fail-safe open
- Less than 320 milliseconds full stroke response time
- Increased thermal isolation of electric components
- Bearings designed for high cycle service
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Detailed Description
The 4″ butterfly bleed air valve plays a crucial role in controlling the flow of compressed air, called bleed air, from the compressor section of a gas turbine. This airflow regulation helps maintain safe and efficient turbine operation by managing pressure and protecting internal components.
This valve is built with a strong bearing shaft and specially designed bearings that handle frequent cycles, ensuring a longer service life and less maintenance. It includes a fail-safe feature that automatically opens the valve if a problem occurs, protecting the turbine from damage. With a quick response time—fully opening or closing in less than 320 milliseconds—it reacts fast to changing engine conditions. The valve’s electric components are also better insulated from heat, improving reliability even in harsh environments.
What makes the 4″ valve stand out is its ideal size and performance. It offers greater airflow than smaller valves, yet remains compact and easier to fit than larger ones, making it perfect for medium-duty applications where space and precise control are important.
Importantly, this valve is designed as a direct, plug-and-play replacement for existing models. It requires no changes to the hydraulic or electrical systems, allowing for quick upgrades without downtime. This seamless fit and reliable operation help ensure your gas turbine runs smoothly and efficiently, reducing costs and increasing uptime.
Engineering Data
