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gemini separable compressors

Cooper is the OEM for Gemini high-speed separable compressors. We manufacture new compressors and provide full service and support for the installed base.
Cooper Machinery Services is the O.E.M. of Gemini Compressors
IN DEPTH EXPERTISE, CAPABILITIES, AND PARTS INVENTORY

GEMINI OVERVIEW

Cooper offers the Gemini line of API 11P high-speed reciprocating compressors, providing our customers with economic, flexible, and reliable solutions to meet their gas compression needs. Our high-speed reciprocating products range from 60 hp (45 kW) to 7,200 hp (5,370 kW), with a variety of piston rod load capacities and frame stroke combinations. Operating 24 hours a day, seven days a week, over 15,000 of our compressors can be found around the globe, working in fuel-gas boosting, gas gathering, gas lift, compressed natural gas (CNG) fueling, and pipeline and storage/withdrawal applications.

Gemini Compressors Parts

The best way to keep your Gemini compressors performing to its full potential is with OEM Cooper parts designed specifically for the job. With decades of engineering, manufacturing, and in-field experience in material wear and customer demand patterns, our parts inventory system is designed to reflect and respond to the real needs of modern operating conditions. Whether you have a current Gemini model or one of our legacy brands, we’ll have the parts you need when you need them.

Contacts

Gemini Account Manager

Customer Support

Technical Support

GEMINI Compressors SERVICE & REPAIRS

Our field service technicians have the most comprehensive on-machine analysis capabilities in the industry. Our portable diagnostics systems are much less intrusive than on-board systems. In fact, they actually reduce the number of on-board sensors required. We can perform a full range of comparative and trend analyses and diagnostics at your site to improve the performance, mechanical condition, and reliability of your high-speed compressors. In-field monitoring by a Cooper specialist enables immediate action to increase the efficiency and operating performance of your Gemini high-speed reciprocating compressors. 

GEMINI compressors UPGRADES

As the OEM, Cooper provides technology and engineering services for Gemini separable compressors. With our advanced technologies, expertise, and project management experience, we offer Gemini compressors upgrades to improve efficiency, reliability, and maintenance costs.

To further strengthen our upgrade portfolio for Gemini separable compressors, Cooper acquired HOERBIGER’s Engines Services (HES) division in 2019. Cooper now offers even more upgrade technologies for all our engine and compressor lines, including Gemini.

EXCEPTIONAL QUALITY & ABSOLUTE DEPENDABILITY

Gemini’s legacy dates back to 1870 when August Witte opened Witte Iron Works in Kansas City, Kansas. For decades after, August and his son, Ed Witte, continued to grow their business producing gasoline engines, generators, and compressors. Eventually, the business was purchased by Chicago Pneumatic who designed a high-speed compressor that eventually evolved into the Gemini units we know today.

Gemini Logo

GEMINI Upgrades

CodeTitleDescriptionOutcomes
GMC20004Compressor VVCP upgradeControl capacity and efficiently adjust the compressor throughput and power.Efficiency
GMC20005Compressor Sour Gas VVCP upgradeMeet API and NACE standards with sour gas compliant cylinders.Reliability
Efficiency
GMC20006Flexflow CylindersCooper offers a variety of FlexFlow cylinders available for mounting on larger frames. All cylinders are featured with liners that allow for changing inner cylinder bore diameter without a need of replacing entire cylinder body.Efficiency
Lubrication SystemLubrication SystemProtect your investment with a leading lubrication system. Optimized design, maximized compressor valve life, reduced lube oil carryover, preventative equipment damage and downtime, and fail-safe protection for your critical machinery.Efficiency, Emission, Reliability, Maintenance
Retrofit vs. NewCompressor Package RetrofitCooper offers complete reconfigured compressor package solutions for your legacy equipment.Repurposing

Gemini Compressors

Frame SeriesM SeriesH SeriesA Series
Frame ModelM301M302H301H302H304A351A352A354
Number of throws12124124
Max power (hp)
(kW)
60
45
120
89
100
75
200
149
400
298
200
149
400
298
800
597
Stroke (in/mm)3 / 763 / 763.5 / 89
Max RPM1,8001,8001,800
Combined rod load (lbf/kN)
Tension6,000 / 2710,000 / 4414,500 / 64
Compression6,000 / 2710,000 / 4412,500 / 56
Total12,000 / 5320,000 / 8927,000 / 120
Main bearing diameter (in/mm)3 / 763 / 763.25 / 83
Piston rod diameter1.125 / 291.125 / 291.375 / 35
Crankshaft materialForged SteelForged SteelForged Steel
NEW HYDROGEN TEST ALERT

COOPER EXPANDS USE OF HYDROGEN FUEL IN AN INTEGRAL ENGINE, TOPPING 30% BY VOLUME

In March 2022, Cooper Machinery Services (Cooper) successfully tested a slow-speed integral engine running on a hydrogen (H2) fuel blend (95% natural gas and 5% hydrogen by volume). This month, Cooper greatly exceeded industry expectations by successfully testing the same engine with a fuel blend of 30% H2 by volume, achieving significant reductions in CO, CO2, THC, and methane emissions.

CleanBurn Plus™ two-stroke AJAX® 2802

Cooper Awarded Enterprise R-3 Engine-Generator Project by the United States Space Force

Houston, TX, September 12, 2022 –(PR.com)– Cooper Machinery Services (Cooper), LLC, a portfolio company of Arcline Investment Management, has been awarded a contract by the United States Space Force (U.S.S.F.) to overhaul two of the six backup Enterprise R3 engine-generator sets stationed inside the Cheyenne Mountain Space Force Station in Colorado.