Cooper-Bessemer Compressor Cylinder Assembly & Related Spares
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Offered as one surplus package consisting of a Cooper-Bessemer C-1201 compressor cylinder assembly and related FM-2 / C-1201 replacement components. The package comprises 12 inventory line items and 30 total units, including the primary cylinder assembly.
Listing Summary
Offered as one surplus package consisting of a Cooper-Bessemer C-1201 compressor cylinder assembly and related FM-2 / C-1201 replacement components. The package comprises 12 inventory line items and 30 total units, including the primary cylinder assembly.
The photographed cylinder is a large, palletized Cooper-Bessemer assembly marked CEBN-105-4, Item 1, Drawing C-1201. It is accompanied by major reciprocating-compressor spares including a piston-and-rod assembly, rods, crosshead components, rider rings, packing components, and unloader parts.
The Cooper-Bessemer FM-2 is a well-known integral engine-compressor widely used in natural gas gathering, transmission, and processing across North America. The CEBN-105-4 designation identifies the specific cylinder position on the FM-2 compressor frame. Spare cylinders for FM-2 frames are difficult to source and command strong prices in the aftermarket. This unit is a genuine OEM Cooper-Bessemer casting with full nameplate traceability.
Please see attached spreadsheet for full list of parts available
Key Specifications
| Specification | Detail |
| Manufacturer | Cooper-Bessemer Company (Division of Cooper Industries, Inc.) |
| Compressor Model | Cooper-Bessemer FM-2 |
| Frame / Cylinder Designation | CEBN-105-4, Item 1 (Drawing C-1201) |
| Serial Number | 38484 |
| Bore x Stroke | 13¼" (13.25") x 10½" (10.5") |
| Max Working Pressure (MAWP) | 700 PSIG |
| Max Working Temperature | 247°F |
| Hydrostatic Test Pressure | 1,050 PSIG |
| Suction Pressure | ~8.8 PSIG gauge |
| Discharge Pressure | ~25 PSIG gauge |
| Max Relief Valve Setting | 700 PSI |
| Capacity | 3 MMCFD at 14.7 psi and 60°F |
| Normal Clearance — Overall | 10.7% |
| Normal Clearance — Head End | 17.0% |
| Customer Order No. | 444703-4-303 |
Package Components at a Glance
| Component group | Quantity | Package description |
| Primary cylinder assembly | 1 | C-1201 / CEBN-105-4 cylinder assembly. |
| Piston-and-rod assembly | 1 | Piston-and-rod assembly described as a 13¼ in. diameter × 17 in. long piston with a 2¼ in. diameter × 55 in. long rod, two rider bands, and associated studs and nuts. |
| Rod and connecting-rod components | 2 | One rod and one connecting rod identified as FM-2 / C-1201-related parts. |
| Crosshead components | 3 | Two shoe crossheads and one crosshead pin. |
| Rider rings | 16 | Six oversize rider rings and ten rider rings. |
| Packing components | 5 | Packing cases and 2¼ in. pressure-packing components, including 7-cup-design packing cases. |
| Unloader components | 2 | One cage unloader valve and one spider unloader. |
| Total package | 30 | 12 inventory line items, sold together as one package. |
Typical Applications
The Cooper-Bessemer FM-2 integral engine-compressor is used extensively in:
•Natural gas gathering and transmission (pipeline compression)
•Gas processing plants (inlet compression, residue gas compression)
•Underground gas storage (injection and withdrawal compression)
•Petrochemical plants (process gas compression)
A spare cylinder assembly for a Cooper-Bessemer FM-2 / CEBN-105-4 frame is a critical maintenance item for any facility running this compressor. The FM-2 has an exceptionally long service life and many units remain in active service across North American gas fields, making spare cylinders highly sought after.