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gemini

Cooper is the OEM for Gemini high-speed separable compressors. We manufacture new compressors and provide full service and support for the installed base.
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 Parts

The best way to keep your Gemini compressor 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.

Gemini 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 compressor.

gemini 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 compressor 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

A Rich Legacy

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
Compressor Package RetrofitCooper offers complete reconfigured compressor package solutions for your legacy equipment.Repurposing

Gemini Compressors

ModelNumber of ThrowsRated Speed (rpm)Rated Power (bhp)Stroke (in)Rod Diam (in)Con Rod Length (in)Compression Rod Load (lbf)
A351        1     1800    200.0    3.500    1.375    8.380  14500.0
A352        2     1800    400.0    3.500    1.375    8.380  14500.0
A354        4     1800    800.0    3.500    1.375    8.380  14500.0
B352        2     1800    600.0    3.500    1.750   12.000  25000.0
B354        4     1800   1200.0    3.500    1.750   13.250  25000.0
B452        2     1500    700.0    4.500    2.000   12.000  30000.0
B454        4     1500   1400.0    4.500    2.000   13.250  30000.0
B502        2     1200    800.0    5.000    2.000   12.000  30000.0
B504        4     1200   1600.0    5.000    2.000   13.250  30000.0
BJD        2     1800    600.0    3.500    1.750   12.000  20000.0
BKD        2     1200    800.0    5.000    2.000   13.250  30000.0
BKDD        4     1200   1600.0    5.000    2.000   13.250  30000.0
BRD        2     1500    700.0    4.500    2.000   13.250  25000.0
D422        2     1600   1200.0    4.250    1.500   14.500  22000.0
D424        4     1600   2400.0    4.250    1.500   14.500  22000.0
D502        2     1500   1200.0    5.000    2.000   14.500  32500.0
D504        4     1500   2400.0    5.000    2.000   14.500  32500.0
D602        2     1200   1200.0    6.000    2.000   14.500  32500.0
D604        4     1200   2400.0    6.000    2.000   14.500  32500.0
DS502        2     1500   1200.0    5.000    2.000   14.500  35000.0
DS504        4     1500   2400.0    5.000    2.000   14.500  35000.0
DS602        2     1200   1200.0    6.000    2.000   14.500  35000.0
DS604        4     1200   2400.0    6.000    2.000   14.500  35000.0
E502        2     1500   2400.0    5.000    2.250   18.000  47500.0
E504        4     1500   4800.0    5.000    2.250   18.000  47500.0
E506        6     1500   7200.0    5.000    2.250   18.000  47500.0
E602        2     1200   2400.0    6.000    2.250   18.000  47500.0
E604        4     1200   4800.0    6.000    2.250   18.000  47500.0
E606        6     1200   7200.0    6.000    2.250   18.000  47500.0
E702        2     1000   2400.0    7.000    2.250   18.000  47500.0
E704        4     1000   4800.0    7.000    2.250   18.000  47500.0
E706        6     1000   7200.0    7.000    2.250   18.000  47500.0
ES502        2     1500   2400.0    5.000    2.250   18.000  50000.0
ES504        4     1500   4800.0    5.000    2.250   18.000  50000.0
ES506        6     1500   7200.0    5.000    2.250   18.000  50000.0
ES602        2     1200   2400.0    6.000    2.250   18.000  50000.0
ES604        4     1200   4800.0    6.000    2.250   18.000  50000.0
ES606        6     1200   7200.0    6.000    2.250   18.000  50000.0
ES702        2     1000   2400.0    7.000    2.250   18.000  50000.0
ES704        4     1000   4800.0    7.000    2.250   18.000  50000.0
ES706        6     1000   7200.0    7.000    2.250   18.000  50000.0
F502        2     1500   2400.0    5.000    2.500   18.000  60000.0
F504        4     1500   4800.0    5.000    2.500   18.000  60000.0
F506        6     1500   7200.0    5.000    2.500   18.000  60000.0
F602        2     1200   2400.0    6.000    2.500   18.000  60000.0
F604        4     1200   4800.0    6.000    2.500   18.000  60000.0
F606        6     1200   7200.0    6.000    2.500   18.000  60000.0
F702        2     1000   2400.0    7.000    2.500   18.000  60000.0
F704        4     1000   4800.0    7.000    2.500   18.000  60000.0
F706        6     1000   7200.0    7.000    2.500   18.000  60000.0
FE332A-2        2     1400    250.0    3.500    1.375    8.375  10000.0
FE332A-4        4     1400    500.0    3.500    1.375    8.375  10000.0
FE332B-2        2     1400    250.0    3.500    1.375    8.375  10000.0
FE332C-2        2     1600    300.0    3.500    1.375    8.375  12000.0
FE332D-2        2     1800    400.0    3.500    1.375    8.375  14500.0
FE332D-4        4     1800    800.0    3.500    1.375    8.375  14500.0
FE450A-2        2     1400    550.0    4.250    1.500   14.500  18000.0
FE450A-4        4     1400   1100.0    4.250    1.500   14.500  18000.0
FE450B-2        2     1500   1200.0    4.250    1.500   14.500  18000.0
FE450B-4        4     1500   2400.0    4.250    1.500   14.500  18000.0
FE450C-2        2     1600   1200.0    4.250    1.500   14.500  22000.0
FE450C-4        4     1600   2400.0    4.250    1.500   14.500  22000.0
FE550A-2        2     1200    550.0    5.000    2.000   14.500  25000.0
FE550A-4        4     1200   1100.0    5.000    2.000   14.500  25000.0
FE550B-2        2     1200    550.0    5.000    2.000   14.500  25000.0
FE550B-4        4     1200   1100.0    5.000    2.000   14.500  25000.0
FE550C-2        2     1500   1200.0    5.000    2.000   14.500  30000.0
FE550C-4        4     1500   2400.0    5.000    2.000   14.500  30000.0
FE550D-2        2     1500   1200.0    5.000    2.000   14.500  32500.0
FE550D-4        4     1500   2400.0    5.000    2.000   14.500  32500.0
FE565A-2        2     1200   1200.0    5.000    2.250   18.000  40000.0
FE565A-4        4     1200   2400.0    5.000    2.250   18.000  40000.0
FE565A-6        6     1200   7200.0    5.000    2.250   18.000  40000.0
FE565B-2        2     1200   1200.0    5.000    2.250   18.000  40000.0
FE565B-4        4     1200   2400.0    5.000    2.250   18.000  40000.0
FE565B-6        6     1200   7200.0    5.000    2.250   18.000  40000.0
FE565C-2        2     1500   2400.0    5.000    2.250   18.000  47500.0
FE565C-4        4     1500   4800.0    5.000    2.250   18.000  47500.0
FE565C-6        6     1500   7200.0    5.000    2.250   18.000  47500.0
FE565DH-2        2     1500   2400.0    5.000    2.500   18.000  60000.0
FE565DH-4        4     1500   4800.0    5.000    2.500   18.000  60000.0
FE565DH-6        6     1500   7200.0    5.000    2.500   18.000  60000.0
FE650A-2        2     1000    550.0    6.000    2.000   14.500  25000.0
FE650A-4        4     1000   1100.0    6.000    2.000   14.500  25000.0
FE650B-2        2     1000    550.0    6.000    2.000   14.500  25000.0
FE650B-4        4     1000   1100.0    6.000    2.000   14.500  25000.0
FE650C-2        2     1200   1200.0    6.000    2.000   14.500  30000.0
FE650C-4        4     1200   2400.0    6.000    2.000   14.500  30000.0
FE650D-2        2     1200   1200.0    6.000    2.000   14.500  32500.0
FE650D-4        4     1200   2400.0    6.000    2.000   14.500  32500.0
FE665A-2        2     1000   1200.0    6.000    2.250   18.000  40000.0
FE665A-4        4     1000   2400.0    6.000    2.250   18.000  40000.0
FE665A-6        6     1000   7200.0    6.000    2.250   18.000  40000.0
FE665B-2        2     1000   2400.0    6.000    2.250   18.000  40000.0
FE665B-4        4     1000   4800.0    6.000    2.250   18.000  40000.0
FE665B-6        6     1000   7200.0    6.000    2.250   18.000  40000.0
FE665C-2        2     1200   2400.0    6.000    2.250   18.000  47500.0
FE665C-4        4     1200   4800.0    6.000    2.250   18.000  47500.0
FE665C-6        6     1200   7200.0    6.000    2.250   18.000  47500.0
FE665DH-2        2     1200   2400.0    6.000    2.500   18.000  60000.0
FE665DH-4        4     1200   4800.0    6.000    2.500   18.000  60000.0
FE665DH-6        6     1200   7200.0    6.000    2.500   18.000  60000.0
FE765B-2        2     1000   2400.0    7.000    2.250   18.000  40000.0
FE765B-4        4     1000   4800.0    7.000    2.250   18.000  40000.0
FE765B-6        6     1000   7200.0    7.000    2.250   18.000  40000.0
FE765C-2        2     1000   2400.0    7.000    2.250   18.000  47500.0
FE765C-4        4     1000   4800.0    7.000    2.250   18.000  47500.0
FE765C-6        6     1000   7200.0    7.000    2.250   18.000  47500.0
FE765DH-2        2     1000   2400.0    7.000    2.500   18.000  60000.0
FE765DH-4        4     1000   4800.0    7.000    2.500   18.000  60000.0
FE765DH-6        6     1000   7200.0    7.000    2.500   18.000  60000.0
FS502        2     1500   2400.0    5.000    2.500   18.000  60000.0
FS504        4     1500   4800.0    5.000    2.500   18.000  60000.0
FS506        6     1500   7200.0    5.000    2.500   18.000  60000.0
FS602        2     1200   2400.0    6.000    2.500   18.000  60000.0
FS604        4     1200   4800.0    6.000    2.500   18.000  60000.0
FS606        6     1200   7200.0    6.000    2.500   18.000  60000.0
FS702        2     1000   2400.0    7.000    2.500   18.000  60000.0
FS704        4     1000   4800.0    7.000    2.500   18.000  60000.0
FS706        6     1000   7200.0    7.000    2.500   18.000  60000.0
H301        1     1800    100.0    3.000    1.125    8.500  10000.0
H302        2     1800    200.0    3.000    1.125    8.500  10000.0
H304        4     1800    400.0    3.000    1.125    8.500  10000.0
HPD        2     1800    200.0    3.000    1.125    8.500  10000.0
HPDB        1     1800    100.0    3.000    1.125    8.500  10000.0
HPDD        4     1800    400.0    3.000    1.125    8.500  10000.0
HPDS        2     1800    200.0    3.000    1.125    8.500  10000.0
HPSS        2     1800    200.0    3.000    1.125    8.500  10000.0
M301        1     1800     60.0    3.000    1.125    8.000   6000.0
M302        2     1800    120.0    3.000    1.125    8.000   6000.0
MOC        2     1800    120.0    3.000    0.000    8.000   6000.0
MPC        2     1800    120.0    3.000    0.000    8.000   6000.0
MPD        2     1800    120.0    3.000    1.125    8.000   6000.0
MPDB        1     1800     60.0    3.000    1.125    8.000   6000.0
MPDS        2     1800    120.0    3.000    1.125    8.000   6000.0
MPSB        1     1800     60.0    3.000    1.125    8.000   6000.0
MPSS        2     1800    120.0    3.000    1.125    8.000   6000.0
DOCUMENTATION

GEMINI SPEC CArd