Packing Case

How Packing Cases Work in Reciprocating Compressors

A packing case is a critical component of any reciprocating compressor. Located where the piston rod exits the crankcase and enters the compression cylinder, it keeps pressurized gas contained within the system and prevents oil from entering the gas stream. It also protects the cylinders from environmental contaminants and debris.

Packing cases are engineered to operate efficiently by preventing gas leaks and contaminants, so reciprocating compressors can run reliably and effectively.

Components

• Packing Rings: Seal around the piston rod to prevent gas leakage.
• Wiper Rings: Clean oil from the piston rod to protect gas purity. Wiper cases are key to protecting cylinders from contaminants, so they can operate efficiently and meet environmental requirements.
• Vented Chambers: Capture or redirect minimal leakage for safe disposal or monitoring.
• Lubrication System: Optional depending on gas type and system requirements.

By keeping a secure seal under high dynamic pressure, the corrosion resistant packing cases impact system performance, protect cylinders from environmental contaminants and extend compressor life.

New Product, Smarter Engineering

Kingsly’s new Packing Case Compressor has been engineered with field insights and the latest in sealing science. Designed for today’s critical gas compression, this heavy duty system has features that deliver measurable performance gains and compliance.

The new design also protects against environmental contaminants, so you meet environmental regulations and maintain optimal performance.

New Design Highlights

• Advanced ring geometry for thermal and pressure cycling
• Corrosion resistant, high durability materials for longer wear life
• Modular design for easy maintenance and retrofitting* Built-in vent and containment options for emissions monitoring
• Precision tolerances and precision manufacturing for consistent sealing across high speed operation

This product demonstrates Kingsly’s commitment to being ahead of the curve while helping customers reduce unplanned downtime and environmental risk.

Also, the heat conductivity of our compressor packing cases and wiper cases ensures efficient operation, minimizes wear and environmental contamination.

Features of Kingsly Compression Packing Cases

Every component in Kingsly’s packing case assembly is selected and machined with the right case material for long term reliability and field ready serviceability.

Reliable packing cases are key to maximizing compressor performance, minimizing downtime and stable operation.

Lubricated and Non-Lubricated

Our solutions are configurable for dry gas, wet gas or oil free service environments.

Cooling is critical to efficient operation as it manages heat through increased cooling flow rates and prevents scale buildup that can impede coolant flow and overall efficiency.

API 618 Compliance

Designed to meet or exceed API 618 compressor standards for severe duty and process critical applications, considering various service conditions such as pressure and type of gas involved.

Coolant flow is critical to maintain heat transfer and prevent scale buildup which can affect packing case life and performance.

Modular Stack Configuration

Allows for custom ring arrangements and in-field replacement or service, reducing maintenance windows. Precision ground sealing surfaces ensure consistent sealing, contributing to overall product functionality and life.

Annular cups contain recesses for packing rings to ensure sealing and emissions compliance in various pressure conditions.

Material Selection

Rings are made from high performance polymers, cast iron and metallic alloys to withstand corrosive and abrasive gas environments.

Bronze alloy steel is used in compressor packing cases to reduce wear and corrosion.

Tandem and Vented

Double packing with intermediate vent provides added control in systems where zero leakage or leak monitoring is required, reduces fugitive emissions.

Cooled packings enhance compressor system performance and reliability by dissipating heat generated during operation. This means less replacements and longer life, ultimately reduces unplanned downtime and operational costs.

These features give operators the performance they need — whether new build or retrofit.

Industries We Serve

Kingsly Compression’s packing case compressors are for industries where gas containment, equipment uptime and regulatory compliance is critical to prevent emissions.

• Oil and Gas — production, transmission and refining systems
• Hydrogen — clean compression for fueling and process applications
• Carbon Capture — precise sealing for CO₂ injection and transport
• Petrochemical — high cycle continuous duty operations
• Industrial Gases — specialty gas packaging and delivery systems