3” Gas Fuel Isolation Valve
Gas Blowoff Valve
Also known as:
Dump Valve, Compressor Bypass Valve
3” Gas Fuel Isolation Valve
Gas Blowoff Valve
Also known as:
Dump Valve, Compressor Bypass ValveBuy
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3” Gas Fuel Isolation Valve is a reliable, fail-safe solenoid valve for quick fuel shutoff in aero-derivative turbines. It supports higher voltage for flexible power options.Sign in
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Executive Summary
The 3” Gas Fuel Isolation Valve is a sleeve-style, solenoid-pilot actuated valve used on aero-derivative gas turbines to rapidly shut off fuel flow during emergencies. It plays a critical role in protecting the turbine by isolating fuel when abnormal conditions are detected.
A solenoid-pilot actuated valve uses an electrical signal (solenoid) to trigger a pilot system, which then controls the main valve. This allows for fast, reliable operation using minimal electrical power—even under high-pressure conditions.
Designed for high-temperature and corrosive environments, the valve is built from durable stainless steel and responds within milliseconds. It is fail-safe, highly dependable, and essential for safe, efficient turbine performance.
Technical Specifications
| Physical Size | 7.5” wide, 25” high |
| Weight | 94 pounds maximum |
| Flange Type | 2.0” ANSI B16.5 CL 600 raised face inlet flange |
| Gas Operation | 720 psig (natural gas), 300°F maximum |
| Fuel Operations | 452 psig, 1100°F compressor discharge air |
| Actuation Pressure | 80 to 125 psig |
| Ambient Temperature | -20 to 240°F |
| Heat Soak | 400°F maximum ambient, 1 to 2 hours |
| Internal Leakage | Complies with MSS-SP-61 |
| Solenoid | Continuous duty, 95-140 VDC, 0.43 ampere maximum |
Features and Benefits
- Fail-safe open (de-energized).
- Supplied with mounting kit.
- For use on both DLE and SAC turbine engines.
- Open and close position indicating switch circuits.
- No maintenance required under normal conditions.
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Detailed Description
The 3” Gas Fuel Isolation Valve is a solenoid-pilot actuated sleeve-style valve designed specifically for aero-derivative gas turbines. It features a three-inch outlet flange and operates on dual voltage ranges of 24 or 95-140 VDC, providing flexibility for various power systems without compromising performance.
Constructed entirely from stainless steel, the valve complies with NACE standards for corrosion resistance, ensuring durability in harsh environments. It is engineered to withstand heat soak temperatures up to 300°F, making it suitable for high-temperature applications commonly found in turbine fuel systems.
Certified to CE-ATEX standards for Zone 2, Group IIA, Category 3, T3 temperature class, the valve is qualified for use in hazardous and explosive atmospheres, enhancing operational safety.
This valve acts as a critical safety device by isolating the fuel supply during emergency shutdowns or fuel system failures, preventing potential damage to the turbine. Typically deployed in pairs, it offers dual-redundancy to maintain safety even if one valve fails.
The valve is widely used in industrial gas turbine fuel systems where rapid and reliable fuel isolation is critical. Its design supports fast shutoff to prevent damage caused by fuel control failures or stuck throttle conditions. The valve’s durability and compliance with industry standards make it a dependable choice for maintaining operational safety in challenging environments.
Engineering Data
