Gas Compression Skid
Smooth, Continuous, and Compact Gas Compression Skids for Industrial Applications
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Modular compression for stable, low-pulsation gas delivery
Our Gas Compression Skids are engineered systems designed to compress and stabilise low to medium pressure gas streams in continuous industrial operations. These systems deliver steady flow with minimal pulsation, making them well suited for vapour recovery, fuel gas, and process gas applications. Backed by CRA’s process and mechanical engineering expertise, the compression skids integrate the compressor, driver, piping, instrumentation, and controls into a single modular package. The design emphasises smooth operation, compact footprint, and reliable performance when handling variable gas compositions and fluctuating flow conditions.
Operation
Continuous duty
Pulsation
Low
Pressure Range
Low to medium
Mount
Single skid package
What is a Gas Compression Skid?
A gas compression skid is a modular, skid-mounted system that compresses and stabilises low to medium pressure gas streams for continuous industrial operations, integrating the compressor, driver, piping, instrumentation, and controls into a single package.
How it works
Gas moves through inlet conditioning, compression, and pulsation control in sequence before it leaves the skid at the required discharge pressure.
Gas enters the skid through inlet scrubbing and filtration, removing liquids and particulates before it reaches the compressor.
The conditioned gas passes through the compressor stage, where pressure is raised to the required discharge level.
Pulsation dampeners and piping layout minimise flow disturbances downstream of the compressor.
Key Benefits
Steady, low-pulsation compression protects downstream equipment and improves process stability.
Designed for uninterrupted service in applications with variable gas flow and composition.
Skid-mounted construction minimises space requirements and simplifies transport and installation.
Simple mechanical layouts support long service life with reduced routine maintenance.
Careful equipment selection and system integration support efficient and reliable operation.
Projects That Push Boundaries
Purpose-built for remote dairy site conditions with gas delivery to a distant utilisation point.
Rotary vane compressor units engineered for continuous digester gas recirculation at a municipal STP.
Complete gas conditioning train transforming raw digester gas into clean, usable fuel for a city utility.
Continuous recirculation with automated gas distribution and no mechanical mixers inside the digesters.
The CRA Edge
Decades of experience in gas handling, compression, and combustion systems.
Integrated process, mechanical, and controls engineering under one roof.
Designed to meet API, ASME, ISO, IEC, and project-specific standards.
Each compression skid is engineered to suit the actual process conditions of the site.
Applications
Frequently Asked Questions
What does a gas compression skid do?
A gas compression skid raises and stabilises the pressure of a low or medium pressure gas stream so that it can be used as fuel gas, recovered from a vapour recovery or flare gas recovery system, or fed into a downstream process instead of being vented or flared. The compressor, driver, piping, instrumentation and controls are mounted on one frame as a single package. CRA designs the skid for steady, low-pulsation flow and continuous duty, which protects downstream equipment and keeps the process stable when gas composition and flow vary.
Which applications use a gas compression skid?
Gas compression skids are used in vapour recovery units, flare gas recovery systems, fuel gas boosting, low pressure process gas handling, gas recycling and reuse systems, and emergency or upset gas management. These streams often carry a variable composition and a fluctuating flow, so the skid is engineered around low-pulsation, continuous-duty compression and a control scheme that follows the actual load. CRA applies the same engineering to biogas boosting, where it has always used roots (twin-lobe) blowers for low pressure duty.
How is a gas compression skid sized for a site?
A gas compression skid is sized from the inlet pressure, the required discharge pressure, the gas composition and the flow range the site actually sees, including turndown and upset cases. Composition swings, which are common in biogas and process gas streams, affect compressor selection, cooling duty and turndown, so CRA designs around the real operating envelope and does not work from a catalogue rating. The compressor, driver, piping and cooling are then matched to each other on the skid.
Which compressor types are used on CRA gas compression skids?
CRA selects the compressor type for the duty. Rotary vane compressors suit wet, dirty or sour low pressure gas such as vapour recovery and biogas. Liquid ring and screw compressors are used for flare gas recovery and higher sustained flows, and roots (twin-lobe) blowers are used for low pressure biogas boosting. Reciprocating compressors are applied where high discharge pressure is required. The driver, piping, cooling and controls are then packaged around the selected machine.
What standards do CRA gas compression skids follow?
CRA gas compression skids are engineered to API, ASME, ISO and IEC requirements as applicable, together with any project-specific specification covering the pressure boundary, piping, electrical and controls scope. The exact code set depends on the destination market and the compressor technology used. CRA is ISO 9001 certified through TÜV NORD, and process, mechanical and controls engineering are done in-house in Noida with CRA's own fabrication, so the agreed standard set is applied across the full skid.