As the Original Equipment Manufacturer (O.E.M.) of Gemini separable compressor parts, Cooper has all the parts you’ll ever need.
The best way to keep your Gemini compressor performing to its full potential is with O.E.M. 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 all the parts you need when you need them.
| Model | Number of Throws | Rated 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 |
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.
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.
