Moisture Trap
Efficient Removal of Condensed Moisture from Biogas Lines with Engineered Moisture Traps
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Power-free moisture removal at low-pressure points in biogas lines
CRA’s Moisture Traps are engineered to separate and collect condensed moisture formed in biogas pipelines due to cooling and pressure changes. Installed directly in the gas line, the trap uses controlled flow reversal and impingement to coalesce moisture into droplets, which settle at the base for removal. Designed for low-pressure biogas service, the system operates without external power, ensuring reliable moisture removal and protection of downstream equipment.
Operation
Power-free, passive
Pressure Drop
Minimal
Mechanism
Flow reversal & impingement
Application
Biogas pipeline service
What is a Moisture Trap?
A moisture trap is a passive, in-line vessel that separates and collects condensed moisture from biogas pipelines, removing the water that forms as gas cools and pressure changes along the line, before it can reach compressors, meters, or downstream process equipment.
How it works
Gas entering the trap is forced through a flow reversal that causes entrained water droplets to impinge on internal surfaces and coalesce out of the stream.
Gas entering the trap body is forced through a flow reversal, redirecting the stream so entrained droplets impinge on internal surfaces.
Water droplets coalesce on the internal surfaces rather than continuing on with the gas.
Coalesced moisture falls under gravity to the base of the vessel, where it collects for removal.
Collected moisture drains periodically or automatically through an optional mechanical auto-drain.
Key Benefits
Efficiently removes condensed water from biogas streams to protect downstream equipment.
Optimized internal geometry ensures minimal pressure loss across the system.
Operates mechanically without electricity, ideal for remote and hazardous locations.
Simple construction with optional mechanical auto-drain minimizes maintenance needs.
Designed for low-pressure, corrosive biogas environments with material customization.
Projects That Push Boundaries
Protects downstream blowers, compressors, and gas analysers through continuous condensate removal.
The CRA Edge
Field-tested designs for reliable moisture removal in biogas systems.
Design, material selection, and integration managed internally.
Engineered specifically for low-pressure biogas service conditions.
Sizes, materials, and drain options tailored to site requirements.
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