Gas Blow-Off Valve 24 VDC

Gas Blowoff Valve

Also known as:

Dump Valve, Compressor Bypass Valve

Gas Blow-Off Valve 24 VDC

Gas Blowoff Valve

Also known as:

Dump Valve, Compressor Bypass Valve

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2 Weeks

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Fast-acting valve for safely isolating natural gas or compressor air in gas turbines. Used in oil and gas to protect turbines from fuel supply issues.

Executive Summary

The 3” Gas Blow-Off Valve is a critical safety component used in oil and gas industry gas turbines. It controls the flow of natural gas or compressor air to the turbine, helping to protect the equipment from damage during abnormal conditions or emergencies. Built to withstand high pressures and temperatures, this valve ensures reliable and safe operation in demanding environments. Its fast response and durable design make it essential for preventing costly failures and maintaining continuous, efficient turbine performance.

Technical Specifications

Physical Size 7.5” wide, 25” high
Weight 94 pounds maximum
Flange Type 3.0” ANSI B16.5 CL 600 raised face flanges
Gas Operation 900 psig (natural gas), 400°F maximum
Fuel Operations 640 psig, 800°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
Position Indicating Switch Dual 24 VDC, 2-wire, SPDT

Features and Benefits

  • Fail-safe open (de-energized).
  • For use on both DLE and SAC turbine engines.
  • Open and close position indicating switch circuits.
  • No maintenance required under normal conditions.
  • Supplied with mounting kit.

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Detailed Description

The 3” Gas Fuel Isolation Valve is designed for use in industrial gas turbines within the oil and gas sector, serving as a vital safety and control device. It regulates the flow of natural gas or compressor discharge air to the turbine, enabling quick isolation of fuel supply during abnormal or emergency conditions to protect the turbine from damage.

This valve features a three-inch outlet flange and is solenoid-pilot actuated, operating on 24 or 95-140 VDC power. It is engineered to withstand high-pressure environments, with natural gas operation rated up to 900 psig and compressor air up to 640 psig. It also endures elevated temperatures, tolerating heat soak conditions up to 400°F for natural gas and up to 800°F for compressor air applications.

Constructed from stainless steel materials compliant with NACE standards, the valve resists corrosion in harsh operating conditions typical in oil and gas facilities. It meets strict safety certifications, including CE-ATEX Group IIA, Category 3, Zone 2, T3, making it suitable for use in potentially explosive atmospheres.

The valve operates with a rapid opening time of approximately 110 milliseconds and closes within 1 second, enabling prompt response to operational changes or emergency shutdown signals. Typically installed in pairs to provide dual-redundancy, these valves enhance system safety by ensuring backup isolation capability.

Overall, the 3” Gas Fuel Isolation Valve is essential for maintaining safe, efficient, and reliable turbine operation by controlling and isolating fuel or air flow, thereby preventing damage and reducing the risk of costly downtime in oil and gas power generation applications.

Engineering Data