CENTRIFUGAL COMPRESSOR
PRECISION ENGINEERING FOR OEM & MULTI-OEM COMPRESSORS
RMS delivers engineered upgrades, rerates, and modernization solutions for centrifugal compressors across OEM and multi-OEM platforms. From original equipment configurations to legacy machines operating under evolving process conditions, we apply disciplined engineering and advanced analytical expertise to optimize performance, reliability, and lifecycle value.
As operating demands shift and equipment ages, compressors require more than standard repair. We identify opportunities to enhance aerodynamic efficiency, improve rotordynamic stability, modernize critical systems, and strengthen overall machine integrity. Through advanced analysis, precision manufacturing, and controlled execution, we reduce operational risk and deliver measurable performance improvements in real-world service environments.
REDUCED TURNAROUND TIME
Condensed overhaul time through advance technology deployment
OPERATING EFFICIENCY
Improved through modern impeller and flow-path design
ENGINEERED UPGRADES
Analysis-driven design applied to performance and reliability
HORIZONTALLY SPLIT MULTISTAGE
Horizontally split multistage centrifugal compressors are widely used in process and pipeline applications where reliability and serviceability are essential. The split casing design allows efficient access to the rotor, impellers, seals, and bearings for inspection, maintenance, and overhaul.
BARREL-TYPE MULTISTAGE
Barrel-type multistage centrifugal compressors are designed for high-pressure services where containment strength and mechanical integrity are critical. The pressure-retaining barrel casing supports stable operation while allowing internal components to be serviced and restored during overhaul.
HIGH-PRESSURE SINGLE STAGE (DH)
High-pressure single-stage centrifugal compressors deliver efficient compression in applications requiring compact design and high compression ratios. The overhung impeller configuration provides dependable performance while allowing streamlined inspection, repair, and maintenance.
SINGLE STAGE (D SERIES)
Single-stage centrifugal compressors are commonly used in process applications where dependable compression and simple machine architecture are required. The overhung design allows reliable operation while supporting efficient maintenance, repair, and performance improvements.
SUPPORT ACROSS ALL CENTRIFUGAL COMPRESSOR PLATFORMS
RMS provides engineering, repair, and lifecycle support across a wide range of centrifugal compressor configurations. Our experience includes horizontally split multistage compressors, barrel-type compressors for high-pressure service, and both high-pressure and low-pressure single-stage units.
In addition to Conmec equipment, RMS supports compressors originally manufactured by AC Compressor, legacy Allis-Chalmers machines, and units produced under GE Oil & Gas. This broad platform experience allows us to deliver reliable repair, overhaul, and modernization solutions across multiple compressor designs and operating environments.
METROLOGY & VIRTUAL ASSEMBLY
MEASURE REALITY
PHASE 1
High-precision laser metrology captures critical features, clearances, and gas path geometry to establish a verified engineering baseline. This digital approach replaces manual measurement methods with accurate, repeatable dimensional data that reflects true operating conditions.
By eliminating guesswork and reducing human error, we accelerate validation and ensure every downstream modeling and execution decision begins with measurable reality.
MODEL ASSEMBLY
PHASE 2
Captured dimensional data is transformed into precise virtual assemblies that validate fit-up, confirm alignment, and eliminate interface conflicts before execution. By resolving issues digitally, we improve installation efficiency and reduce downtime in both shop and field environments.
In addition RMS develops digital turnaround packets and engineering documentation that support coordinated, controlled execution from planning through completion.
EXECUTE WITH CERTAINTY
PHASE 3
With assemblies digitally validated and components pre-coordinated, execution proceeds with confidence and precision in both shop and field environments. Installation is completed once, without reactive adjustments, unplanned modifications, or field-driven redesign.
This disciplined approach reduces rework, minimizes execution risk, and significantly shortens outage duration while improving long-term operational reliability.
ENGINEERING & ANALYSIS
Engineering and analysis are the foundation of every successful compressor modernization, rerate, or upgrade strategy. Before physical modifications are implemented, structural, aerodynamic, and rotordynamic evaluations are performed to understand how components respond to mechanical loads, flow behavior, pressure conditions, and dynamic forces across the operating envelope. This comprehensive approach ensures that performance, stability, and reliability are validated under real-world conditions—not assumed.
By integrating advanced modeling with field data and operating history, performance limitations are identified early and modernization strategies are developed with precision. Analytical validation reduces mechanical risk, supports informed decision-making, and provides a controlled path forward before execution begins.
STRUCTURAL ANALYSIS
Detailed structural analysis evaluates how critical compressor components respond to mechanical loads, pressure differentials, and thermal conditions. Advanced modeling techniques assess stress distribution, deformation, and fatigue behavior to validate structural integrity under expected operating environments.
This analysis identifies potential failure points, supports modernization upgrades, and ensures long-term reliability before execution begins.
AERODYNAMIC ANALYSIS
Detailed aerodynamic analysis evaluates gas flow behavior throughout the compressor, including impeller performance and stage interaction. Modeling pressure ratios, flow characteristics, and operating conditions reveals opportunities to improve efficiency, increase capacity, and optimize performance for current process demands.
This analysis supports rerates and performance enhancements while maintaining stable operation across the expected operating range.
ROTOR DYNAMICS
Comprehensive rotordynamic analysis evaluates shaft stability, critical speeds, and vibration behavior across the compressor’s operating range. Modeling rotor-bearing interaction, system stiffness, damping characteristics, and seal effects determines machine response under real load and speed conditions.
This analysis identifies instability risks, validates safe passage through critical speeds, and optimizes system configurations to ensure reliable operation.
REPAIR & OVERHAULS
Repair and overhaul services restore mechanical integrity while identifying opportunities to strengthen long-term performance and reliability. From complete compressor teardowns and inspections to precision component repair and controlled reassembly, each project is executed with disciplined process control and documented quality standards.
Comprehensive inspection protocols, dimensional validation, material assessment, and detailed condition reporting ensure that every rotor, casing, seal, and bearing system is returned to service with verified reliability and operational confidence.
CORE CAPABILITIES
• Complete compressor overhauls
• Rotor disassembly and reassembly
• Shaft and journal repair
• Impeller repair and refurbishment
• Casing restoration and machining
• Seal and bearing refurbishment
• Dimensional inspection and documentation
• Controlled shop and field execution
UPGRADES & MODERNIZATION
Upgrades and modernization solutions are designed to improve performance, efficiency, and long-term reliability across evolving operating conditions. As process demands shift and equipment ages, RMS evaluates aerodynamic performance, mechanical stability, and system limitations to identify opportunities for measurable improvement.
From performance rerates and efficiency enhancements to seal system upgrades, materials improvements, and control system modernization, each solution is engineered to increase capacity, reduce energy consumption, and extend asset life while maintaining safe, stable operation.
CORE MODERNIZATION CAPABILITIES
• Performance rerates (flow, pressure, speed adjustments)
• Aerodynamic redesign and efficiency improvements
• Gas condition and application changes
• Seal system upgrades (dry gas, advanced sealing solutions)
• Bearing system modernization
• Materials and component improvements
• Control and instrumentation upgrades
• Driver conversions and system optimization
SPARE PARTS & COMPONENT MANUFACTURING
Engineered spare parts and precision-manufactured components are produced to restore, enhance, and sustain centrifugal compressor performance across OEM and multi-OEM platforms. From complete rotor assemblies to individual critical components, each part is manufactured or refurbished to verified dimensional, material, and performance standards.
Through advanced inspection, reverse engineering, and controlled manufacturing processes, components are delivered with documented quality and validated fit to ensure reliable integration, extended service life, and consistent operational performance.
Component Capabilities
• Complete rotor assemblies
• Impellers and diffusers
• Shafts and shaft components
• Diaphragms and stationary elements
• Labyrinth and dry gas seal components
• Bearings and support hardware
• Instrumentation and mechanical hardware
FIELD SERVICE & TURNAROUND SUPPORT
Field service and turnaround support ensure controlled execution from disassembly through startup. Experienced technical teams provide on-site inspection, supervised disassembly and reassembly, dimensional validation, and coordinated installation support to minimize downtime and maintain mechanical integrity.
Through disciplined outage planning, detailed documentation, and close coordination with plant personnel, projects are executed safely, efficiently, and in alignment with performance objectives and schedule requirements.
Field & Turnaround Capabilities
• On-site inspection and condition assessment
• Disassembly and reassembly supervision
• Dimensional validation and alignment verification
• Outage planning and execution coordination
• Startup and commissioning support
• Controlled quality documentation
ENGINEERED FOR EVERY STAGE OF THE COMPRESSOR LIFECYCLE
From legacy equipment no longer supported by the OEM to modernization and performance enhancement initiatives, we provide engineering, repair, manufacturing, and field support across OEM and multi-OEM platforms.
Whether restoring mechanical integrity, sourcing obsolete components, planning a rerate, or executing a turnaround, our team delivers disciplined solutions grounded in technical expertise and real-world operating experience.