Built for Demanding Environments. Backed by Results.
Since 1902, Stewart & Stevenson has operated as a trusted industrial equipment manufacturer and power generation systems manufacturer headquartered in Houston, Texas. From our ISO 9001:2008 certified Houston facility, we engineer, manufacture, test, and refine mission-critical systems for customers worldwide. As one of the most experienced industrial equipment manufacturers in North America, we support diesel generator manufacturing, gas generator manufacturing, containerized power generation, efrac manufacturing, and fracking manufacturing, all under one roof. From Rail King® railcar movers to fifth-generation electric fracturing systems, every system reflects decades of field-driven engineering.
Your Power, Generations Ahead
Behind the Meter Power
Mobile Generators
Rapid Deployment Power for Dynamic Operations
Trailer-mounted power generation systems engineered for quick deployment, relocation, and plug-and-play operation.
Mobile Natural Gas Generators
High-efficiency natural gas generators on DOT-compliant trailers for mobile baseload power.
Specifications: 500-2,500+ kW | Up to 44.4% electrical efficiency | Natural gas, LNG, field gas | 8,000+ hours/year uptime
Features: Fast start-up | Plug-and-play deployment | Remote monitoring
Applications: Remote microgrids | Oilfield operations | Electric frac fleets | Temporary power | Emergency backup
Mobile Diesel Generators
Custom-engineered mobile diesel generators featuring high-performance engines on DOT-compliant trailers.
Specifications: 30 kW to 3,250+ kW | 100% block load acceptance | EPA Tier 4 Final certification
Applications: Drilling rigs | Fracking fleets | Remote industrial sites | Temporary power
Stationary Generators
Permanent Installation Power for Continuous Operations
Skid-mounted and containerized power generation systems for permanent installations requiring continuous baseload power.
Stationary Natural Gas Generators
Our stationary natural gas generator manufacturing supports high-efficiency natural gas generators on skids and in containerized power generation packages for permanent baseload installations.
Specifications: 500-2,500+ kW | Up to 44.4% electrical efficiency | Natural gas, LNG, field gas | 8,000+ hours/year uptime
Features: Continuous operation optimized | Integrated controls | Custom enclosures
Applications: Data centers | CHP plants | Remote microgrids | Industrial facilities | Distributed energy systems
Stationary Diesel Generators
We provide custom-engineered stationary diesel generators featuring high-performance engines for offshore and permanent installations.
Specifications: 30-3,250+ kW | 100% block load acceptance | EPA Tier 4 Final & IMO III certification | ABS, DNV, USCG marine certified
Applications: Offshore platforms | Marine vessels | Industrial facilities | Mission-critical backup power
Switchgear & Variable Frequency Drive Systems
Custom medium-voltage switchgear and VFD systems designed and manufactured in-house for safe power distribution in hazardous oilfield and industrial environments.
- Voltage Range: 220 V-15 kV standard (higher voltage/DC available for specialized applications)
- VFD Power Output: 10 W – 7+ MW for precision control in varied applications
- Energy Efficiency: 20-60% energy savings by matching motor speed to load demand
- Certifications: ATEX/IECEx compliant with NEMA 4X/7 enclosures
- Custom Engineering: Application-specific designs for unique operational requirements
Applications: Drilling rigs, offshore platforms, compressor stations, electric frac fleets, micro-grids
ReVolt® INTEGRATED eFRAC SYSTEM
The Future Is Electric. And It Starts Here.
eFrac Manufacturing — 5th Generation Electric Fracturing Equipment
Experience the industry’s highest power density—6,600 HP on a single trailer—with ReVolt®, the proven electric fracturing system that cuts emissions by 99% and halves your site footprint. Our efrac manufacturing program delivers fifth-generation electric fracturing systems designed for high-density power and reduced site impact.
ReVolt® Delivers:
- Unmatched Power: 6,600 HP dual-pump performance (also available: 5,000 and 3,300 HP single-pump)
- Efficiency & Reliability: Designed for continuous 24-hr pump time, as well as 100% load
- Cost & Noise Savings: Eliminates diesel fuel and maintenance, reduces crew size by 40%, and operates at a quiet ~85 dB
- Integrated Design: Pumps, blenders, chemical systems, and advanced AccuFrac® controls—all on a single trailer, with zero hydraulic systems
ReVolt® is a fully integrated e-frac solution, combining electric-powered pumps, precision blending, automated chemical systems, centralized power distribution, and advanced fleet controls—delivering unmatched performance, reliability, and simplicity to every fracturing operation.
Conventional Hydraulic Fracturing Equipment
Trailer-Mounted Pumps, Blenders & Control Houses, Manufactured In Houston
Our fracking manufacturing capabilities include fully integrated, trailer-mounted hydraulic fracturing systems built for high-pressure pumping environments. Every system is built to withstand extreme conditions and engineered for rapid deployment.
Frac Pumps
High-pressure triplex and quintuplex pumps (2,250-3,000 HP) with intelligent pump control and real-time monitoring. Trailer-mounted configurations engineered for rapid deployment and extreme durability.
- Tailored for specific applications
- Integrated cooling and filtration systems
- Real-time performance monitoring
- Field-serviceable design
Blenders & Hydration Units
Advanced mixing units with concentric chambers and automated density controls for consistent slurry delivery at high discharge rates.
- Precision automated density control
- High-capacity discharge rates
- Integrated chemical injection systems
- Trailer-mounted for mobility
Data Vans & Control Cabins
Featuring AccuFrac® software for centralized monitoring, real-time data acquisition and logging, and remote fleet management.
- Climate-controlled operator environment
- Multi-screen monitoring and control
- Real-time data acquisition and logging
- Remote fleet management capabilities
- Integrated communication systems
Rail King® Railcar Movers
America’s Most Reliable Railcar Mover, Designed, Built & Refined Over Decades
For over 40 years, Stewart & Stevenson has manufactured Rail King® railcar movers at our Houston facility. Eliminate locomotive rental costs and reduce railcar spotting delays with Rail King®, the trusted name in industrial railcar moving. Every Rail King® unit is designed for durability, safety, and long-term performance, using American-made components that deliver unmatched reliability.
Current Mobile Railcar Movers
| Model | Weight | Tractive Effort (double coupled) | Engine |
|---|---|---|---|
| RK467 G7 | 90,500 lbs | 62,800 lbs | Volvo 7.7L Tier 4F-320 bhp |
| RK347 G7 | 53,800 lbs | 62,800 lbs | Cummins QSB 6.7L Tier 4F |
| RK330 G6 | 50,000 lbs | 50,000 lbs | Cummins QSB Tier 4 Final Engine-195 bhp |
| RK327 G7 | 46,850 lbs | 48,460 lbs | Cummins QSB 6.7L Tier 4F-173 bhp |
| RK307 G7 | 43,400 lbs | 47,320 lbs | Cummins QSB 6.7L Tier 4F-173 bhp |
| RK297 G7 | 40,500 lbs | 46,300 lbs | Cummins QSB 6.7L Tier 4F-173 bhp |
| RK290-WC G6 | 44,000 lbs | 47,320 lbs | Cummins QSB Tier 4F engine-173 bhp |
Generational Innovation
Each Rail King® generation incorporates real-world feedback and engineering improvements developed over decades of field experience, reinforcing our role as a long-standing industrial equipment manufacturer serving manufacturing, warehousing, energy, and rail operations.
- Premium Engine Choice: Factory-installed Volvo Penta and Cummins Tier 4 Final engines
- Maximum Tractive Power: Up to 90,500 lbs of tractive effort from heavy-duty fabricated steel frames
- Superior Safety & Design: Patented 3-point floating suspension and full-width dual-direction cabs
- 360-Degree Visibility: Operator safety engineered into every design iteration
- Applications: Warehousing, chemical plants, refineries, manufacturing facilities, grain operations, short line railroads
Why Stewart & Stevenson Manufacturing?
120+ Years of Manufacturing
Excellence
Trusted since 1902
Custom-
Engineered
Solutions
Built to your specifications
Proven
Reliability
Operating in extreme environments worldwide
Complete
Integration
From design through commissioning
Aftermarket
Support
Parts, service, training, and remanufacturing
