Oil Wiper Packing

Oil wiper packing plays a critical role in maintaining reciprocating compressor reliability by preventing crankcase oil from contaminating downstream components and processes.

Properly functioning wiper packing also reduces oil consumption and costs, while protecting the environment from leakage.

Oil Wiper Design

Oil wiper rings are usually located near the crosshead assembly. They function by scraping the oil film from the compressor rod as it moves back and forth between the frame and cylinder. To be effective, wipers must remove oil from the entire circumference of the piston rod and have a drain profile that meets the specific needs of the machine.

Cook Compression wiper rings are optimized for each application and constructed of materials, such as TruTech™ 3110 material, that provide the optimum balance of strength, flexibility and durability.

  • Simple design typically used in a two- or three-ring arrangement
  • Rings are radially cut with face drains
  • Mode from cost iron, bronze or non-metallic materials
  • More advanced design, typically used in a two- or three-ring arrangement
  • Rings are radially cut with face drains as well as drilled holes for improved oil management
  • Made from non-metallic materials
  • Provides both wiping and gas sealing capabilities
  • Typically used in a three-ring arrangement , with two radial-cut wiper rings and a butt tangent-cut seal ring
  • Made from non-metallic materials
  • Provides both wiping and gas sealing capabilities
  • Three rings in a single-groove assembly
  • Proprietary knife-edge geometry on first ring scrapes practically all oil film from rod
  • Side-loaded second ring seals first and third rings against adjacent cup surfaces for effective gas seal
  • Made from non-metallic materials

Material Selection

Cook Compression manufactures wiper rings in a broad range of metallic and non-metallic materials.

The proprietary TruTech™ 3110 material was developed especially for oil wiper service. This PTFE-based compound provides a sharp wiping edge that retains its effectiveness over extended use. TruTech 3110 imparts flexibility, allowing wiper rings to tightly conform to the rod surface and eliminate potential leak paths.

The properties of TruTech 3110 also make it exceptionally safe for contact with metal surfaces, avoiding wear to the compressor rod.

Oil Wiper Rings Information Sheet

Oil Wiper Rings