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Cooper's Advanced Technology


Product Innovations

Cooper, as the long time O.E.M. for many famous brands of engines and compressors, is known for its product innovation. We maintain a large and talented team of design engineers who are constantly invested in the development of new and advanced technologies, new products, and product upgrades. Our goal is to help our customers save money by constantly developing Cooper’s advanced technology that offer a distinct advantage over other gas compression products available in the market. 


A limiting factor in a reciprocating compressor is the degree of crank rotation required for proper pin load reversal to ensure adequate pin lubrication. The industry standard is 30 or more degrees. Improper pin reversal can lead to insufficient lubrication for the connecting rod bushing, which in turn, can lead to a bushing failure and catastrophic connecting rod and crankshaft damage.

Cooper’s crosshead for the H and M-series Gemini compressor frames is designed with roller bearings to eliminate the non-reversal requirement and provide better reliability. The roller bearing design is rated at zero degrees of rod reversal, has the ability to single-act and unload cylinders on either head-end or crank-end, and improves overall component life.


To provide higher operation flexibility to our customers, Cooper offers a variety of FlexFlow cylinders available for mounting on MH, WH, and WG frames. FlexFlow provides various types of cylinders such as lubricated, non-lubricated, air-cooled, water-cooled, or high-pressure. All cylinders are featured with liners that allow for changing inner cylinder bore diameter without a need for replacing the entire cylinder body. This can significantly increase machine operating range and solve the issue of pressure drop from the field wellhead.


  • Higher flexibility – Only liners (not full cylinders) need to be exchanged to upgrade a compressor to meet new site requirements.
  • Higher revenue – FlexFlow compressors achieve higher flow which results in additional revenue.
  • Reduced investment cost due to fewer equipment upgrades.
  • Saved personnel time – flexible cylinders eliminate complications typically associated with facility expansions.
  • Flexible cylinders are available in a non-lube option which reduces maintenance costs and eliminates gas contamination.
  • Field-confirmed solutions and component designs ensure long-lasting machine life.

Couple-free design with a common centerline

Couple-Free Designs

Couple-free technology is the only true balance-opposed machine and comes with many benefits:

  • Less vibration & noise due to in-line opposing compressor throws.
  • Increased crankshaft lifespan due to less crankshaft movement.
  • Lower maintenance costs.

The wide center connecting rod is equal in weight and strength to the total of the two narrow connecting rods. The crosshead pins have oil passages to provide pressure lubrication. They are also bored out to accommodate a selection of weights for final balancing of the assembly.


Less is better when it comes to replacement and maintenance of engine parts. A two-cycle engine does not require the following:

  • Cam, camshafts, and bearings
  • Valve stems and valve stem bushings
  • Valve covers and gaskets
  • Push rods
  • Tappets
  • Seats
  • Timing gears
  • Valve springs
  • Intake and exhaust valves
  • Rocker arms


Consider the advantages of using integral engine-compressors versus high-speed separable ones.

  • Common crankshaft – no coupling
  • Alignment not required
  • Lowest mechanical losses
  • Matched design
  • Smooth-running balance – opposed design
High Speed Separable
  • Coupling required
  • Critical alignment with close tolerances
  • Higher mechanical losses
  • Potential engine / compressor mismatch
  • Higher vibration