Protection Function

Compressors cannot compress liquids and suffer severe damage from liquid carryover including valve failures, cylinder damage, rod breakage, and catastrophic mechanical failure. HP KO drums provide last-line protection removing liquids immediately upstream of compressor suction. High-efficiency separation with level shutdown prevents liquid breakthrough protecting expensive compression equipment.

Vessel Design

Vertical separator with vaned inlet distributor and wire mesh mist eliminator capturing liquid droplets. Gas outlet connects directly to compressor suction. Liquid sump with high-level shutdown trips compressor preventing liquid ingestion. ERGIL sizes drums for gas flow, operating pressure typically 300-1500 psig, and liquid handling capacity providing adequate protection.

Design Standards

Constructed per ASME Section VIII with materials suitable for gas composition including sour service. Relief valve protection sized for blocked outlet scenarios. Design accommodates thermal cycling and pressure variations. Full hydrostatic testing and NDT inspection validates integrity.

Applications

Centrifugal and reciprocating compressor suction protection in gas gathering, pipeline compression, gas plant inlet compression, refrigeration systems, and vapor recovery units. Essential safety equipment protecting compression assets across upstream production, midstream transmission, and gas processing operations.

Control and Safety

High and high-high level switches provide alarm and automatic compressor shutdown. Level transmitter enables continuous monitoring. Integration with compressor controls ensures safe operation. Fail-safe design prevents liquid carryover during control failures. Manual and automatic drain valves manage liquid removal to closed systems.

Material Selection

Carbon steel or stainless steel construction based on gas composition. Materials rated for operating pressures and temperatures. NACE compliance for H₂S service. Proper corrosion allowances and protective coatings. Internal components resist erosion from high-velocity gas flows.

Performance Features

High separation efficiency protects compressors from liquid damage. Compact design suits installation in congested compressor areas. Reliable level detection and shutdown systems. Minimal pressure drop preserves compression efficiency. Proven technology preventing costly compressor failures and unplanned shutdowns.

ERGIL HP safety knockout drums deliver critical liquid protection ensuring compressor reliability and preventing catastrophic equipment damage in high-pressure gas compression operations.