The 3-inch sleeve-style hot air purge valve is designed for aero-derivative industrial gas turbines to control the flow of hot compressor bleed air used in critical purge operations. This valve is normally closed and solenoid-pilot actuated, available in two- or three-inch sizes with elbow sleeve design. It operates on 24 or 125 VDC power and is constructed with ANSI B16.5 Class 600 raised face flanges.

Key specifications include a physical size of approximately 7.5 inches wide and 25 inches high, weighing between 84 to 91 pounds. It can handle line pressures up to 500 psig and actuation pressures between 80 and 125 psig. The valve is rated to operate in fluid temperatures ranging from 32°F to 1100°F (bleed air), and can withstand ambient temperatures between –20°F and 240°F with heat soak up to 400°F for 1 to 2 hours when de-energized.

Performance characteristics include a flow capacity of about 1.2 pounds per second of compressor bleed air with a maximum pressure drop of 0.70 psi across normal operating conditions. Internal leakage is minimal, rated at 0.00025 pounds per minute. The valve features a rapid full stroke response time of 1 second for both opening and closing cycles. It includes a position indicating switch and supports continuous duty operation.

Functionally, this valve plays a crucial role in purging residual fuels, such as diesel, from the combustor fuel lines when switching fuels, preventing deposits that can impair turbine performance or cause damage. The valve is often installed in pairs for dual redundancy to enhance safety and operational reliability. With millions of field operating hours, this design reflects high durability and precise control essential for efficient and safe turbine operation.

The 3” Globe-Style Gas Metering Valve is designed to deliver accurate and consistent fuel control in industrial gas turbines, including both Dry Low Emissions (DLE) and Single Annular Combustor (SAC) engine types. This valve ensures that the correct amount of gas fuel is metered into the engine based on real-time operating conditions—essential for achieving stable combustion, optimal turbine performance, and reduced emissions.

With an accuracy of ±3% of flow point and a full-stroke response time of 175 milliseconds, it supports precise adjustments to the fuel-to-air ratio, even under fluctuating load conditions. This level of performance is critical for maintaining turbine efficiency, lowering NOx and CO emissions, and supporting regulatory compliance.

The globe-style design allows for smooth fuel flow control, making it ideal for high-capacity, high-pressure turbine applications, such as those found in the oil and gas industry. Built to withstand extreme temperatures and pressures, the valve is available with certifications such as ATEX Zone 1 and 2, PED, UL, and NEC Class 1, ensuring safe operation in hazardous environments.

This metering valve supports modern turbine control systems and is part of a generation of components that prioritize long-term reliability, reduced maintenance needs, and consistent field performance.

The LM2500XPRESS+G4 DLE UPT is a fast-deployable gas turbine system engineered for demanding oil and gas environments—onshore or offshore. It offers a balanced combination of power, efficiency, and installation speed, making it especially suited for upstream, midstream, and LNG operations where reliable electricity and mechanical drive are critical and timelines are tight.

At the core of this system is the LM2500+G4 gas generator, a proven design that delivers higher output and efficiency than earlier models, thanks to improvements in airflow, thermal capability, and cooling. It strikes a solid middle ground in the 20–40 MW class—powerful enough to support heavy oilfield infrastructure but lighter and more flexible than larger industrial turbines.

The Dry Low Emissions (DLE) combustion system helps meet environmental regulations without relying on water or steam injection—a major advantage for remote or offshore sites where water supply is limited or emissions compliance is strict.

The Upgraded Power Turbine (UPT) adds flexibility in terms of shaft speed and load-following, which makes this unit adaptable for various oil and gas power demands—from continuous baseload operation to backup and peaking support.

Its XPRESS configuration emphasizes rapid deployment. The turbine is delivered in a compact, modular format, pre-assembled into a small number of transportable units with simplified electrical and mechanical interconnections. This minimizes site work, shortens commissioning time to a matter of weeks, and reduces exposure to remote-site construction risks.

The LM2500+G4 DLE U PT is a versatile gas turbine designed for a wide range of applications, including onshore and offshore power generation, gas pipeline compression, and LNG compression. It features Dry Low Emissions (DLE) technology, which reduces nitrogen oxide (NOx) emissions to as low as 25 parts per million by volume (ppmv) at 15% oxygen, meeting stringent environmental standards.

In the oil and gas industry, production rates are closely linked to available horsepower. The LM2500+G4 DLE U PT offers higher power output, high reliability, and a lower initial cost per kilowatt, making it a cost-effective solution for energy-intensive operations.

This turbine has proven its capability to operate reliably in extreme ambient conditions, with running data demonstrating performance at temperatures as low as -50°F and start-up capability down to -40°F. This wide operational temperature range ensures dependable service in harsh environments.

Fuel flexibility is a key strength of the LM2500+G4 DLE U PT. It can seamlessly switch between various fuels—lean treated natural gas, rich offshore gas, propane, or diesel—without shutting down or losing efficiency. This flexibility supports energy security, allowing continuous operation even if the natural gas supply is interrupted. Additionally, the turbine can be adapted to burn alternative fuels like bioethanol and naphtha, further enhancing fuel options.

A notable advantage of aeroderivative gas turbines like the LM2500+G4 DLE U PT is their ability to operate on hydrogen blends, which produce no carbon emissions when combusted. Both new turbines and existing units can be converted for high hydrogen fuel use, supporting decarbonization goals.

Moreover, the LM2500+G4 DLE U PT is truly dual-fuel capable, able to switch from 100% natural gas to 100% propane without the need for pilot fuels. This contrasts with dual-fuel reciprocating engines, which typically require about 5% diesel during gas operation, increasing costs and emissions. The LM2500+G4 DLE U PT’s fuel flexibility, emission controls, and robust design make it a reliable and efficient choice for demanding mechanical drive and power generation needs in the oil and gas sector.

The LM2500+G4 is an advanced variant of the LM2500+ aeroderivative gas turbine, designed to provide increased output and thermal efficiency through a set of targeted design upgrades. It retains the core architecture of the LM2500+ but introduces changes to the flow path that increase overall engine performance.

The primary difference between the LM2500+G4 and the LM2500+ is the increased flow capacity in the high-pressure (HP) compressor, HP turbine, and low-pressure turbine. These modifications raise the overall pressure ratio from 23.6 to 24.2, resulting in higher thermal efficiency and greater mass flow. The design changes are relatively limited, focusing mainly on minor geometry adjustments to blades and vanes to accommodate the increased flow.

In the high-pressure turbine, the G4 version includes improved blade cooling and upgraded materials. These changes enable the turbine to handle higher temperatures, contributing to both improved performance and component durability. To maintain proper rotor thrust balance with the updated flow path, the effective area of the compressor discharge pressure seal was also adjusted.

In terms of operational performance, the LM2500+G4 offers measurable improvements over the LM2500+ across a variety of ambient conditions. For example, it delivers approximately 11% more power in cold conditions and 12% more in hot conditions (running data to -50 deg F and start data to –40 deg F). In combined-cycle mode, the G4 variant is expected to provide a power increase of 8.5% and a heat rate improvement of 0.75% compared to the LM2500+.

The LM2500+G4 supports two power turbine configurations:

• A six-stage, low-speed power turbine, typically used for power generation applications with a nominal speed of 3600 rpm.
• A two-stage High-Speed Power Turbine (HSPT), used for mechanical drive applications, designed for a nominal speed of 6100 rpm, with an operating range from 3050 to 6400 rpm.

Both configurations support operation over a cubic load curve, which allows the turbine to match power output with varying mechanical loads — a feature especially useful in pipeline compression and similar variable-load industrial applications.