RehabbedSpecifications
ManufacturerGreenfield
ModelC3U209GP
Year2009
ConditionRehabbed
Capacity250 SCFM
Pressure Rating4,500 PSIG
Gas ServiceNatural Gas, CNG, RNG
LocationWaxahachie, TX, United States
Stock #GE4S-1069
Description
This 2009 Greenfield C3U209GP CNG/RNG compression skid has less than 1,500 operating hours and delivers 250 SCFM at 100 PSI inlet pressure with a 4,500 PSIG discharge. The unit is powered by a 125 HP electric motor and includes integrated controls, automatic inlet shutoff, and emergency shutdown. It will be fully refurbished, cleaned, and repainted with new belts, oil, and air filters prior to shipment, with refurbishment cost included in the sale price.
Compressor Specifications:
Manufacturer: Greenfield (Atlas Copco, Pratteln Schweiz)
Capacity: 250 SCFM at 100 PSI inlet (80–115 PSI range)
Discharge Pressure: 4,500 PSIG
Speed: 1,230 RPM
Motor Specifications:
125 HP electric drive motor
Voltage: 460V | Current: 156A | Speed: 1,800 RPM | Phase: 3 | Frequency: 60Hz
Integrated Skid Features:
Automatic inlet shutoff valve
ESD (Emergency Shutdown) is located on the compressor-mounted control panel
Manual inlet valve (approx. 93 ft from MCC)
Includes Greenfield programmable compression controls
Condition & Refurbishment:
This unit will be fully refurbished, cleaned, and repainted to its original condition prior to shipment. New belts, oil, and air filters will be installed, and the skid will be delivered ready for commissioning. The refurbishment cost is included in the sale price.
Optional Equipment:
• Gas Dryer – Pneumatic Products FA-40 single-tower dryer with pre/post-filters, tailored for flow requirements (+$10,000)
• Greenfield Dispenser – Two-sided, 3,600 PSIG with alarms (+$2,000)
Testing Support:
Full functionality testing is available through a local third-party provider, including electrical panel inspection, component upgrades, and operational verification. Additional cost ranges $10K–$25K depending on scope (includes shipping and crane services).
With a first major overhaul interval at 20,000 hours and a life expectancy exceeding 80,000 hours, this compressor is a strong choice for CNG/RNG project developers seeking long-term ROI, reliability, and quick deployment.
Documentation:
Complete equipment manuals, schematics, control panel drawings, and service records are available, showing a consistent history of timely maintenance and clean operation prior to decommissioning.
Questions buyers ask
What capacity and discharge pressure does it actually deliver?
This unit delivers 250 SCFM at 100 PSI inlet pressure with a discharge pressure of 4,500 PSIG. The inlet pressure range is 80–115 PSI, and capacity will vary with inlet conditions—CNG compressors typically follow a mass flow relationship, so capacity drops proportionally as inlet pressure decreases below the rated 100 PSI.
What drive, power and cooling does it require?
The compressor is driven by a 125 HP electric motor rated at 460V, 156A, 3-phase, 60Hz, operating at 1,800 RPM. The compressor itself runs at 1,230 RPM, indicating a belt drive arrangement. The listing does not specify cooling requirements, so confirm with the seller whether this is air-cooled or requires a glycol or water cooling circuit.
What are the running hours and what has been rebuilt?
The unit has less than 1,500 operating hours and will be fully refurbished prior to shipment, including cleaning, repainting, and installation of new belts, oil, and air filters. At this hour count the compressor is well within its first service interval—reciprocating CNG compressors typically reach first major overhaul at 15,000–20,000 hours—so core components should not require rebuild yet. Service records showing maintenance history are available.
What should I inspect on a used compressor before buying?
Focus on the high-pressure packing, valve condition, and cylinder bore wear, as these drive rebuild costs on reciprocating compressors. Request a borescope inspection of cylinders and verification that interstage pressures fall within design limits during a run test. Check the control panel for alarm history, verify crankcase oil analysis if available, and confirm belt condition and alignment even after refurbishment. The listing notes that full functionality testing through a third party is available.
General guidance for this type of equipment. Ask about this specific unit in your inquiry — the seller answers directly.
Inspection, shipping & payment
Inspection
Pre-purchase inspections are welcome during normal business hours by appointment arranged in advance. We can provide complimentary transportation from DFW Airport and back if you would like to send someone to see the equipment in person. We can also walk through the item over a video call for domestic or international buyers. We are on US Central Time.
Shipping and loading
The equipment is located at our yard south of Dallas, Texas. We can assist with shipping arrangements.
Loading is provided at no charge for equipment under 15,000 lb when scheduled in advance. Equipment over 15,000 lb requires a crane, which is arranged and paid for by the buyer.
Payment
Payment in full is required FOB our yard in South Dallas. A verifiable cashier's check is accepted for collection in person. For release to a third-party shipper we require a wire transfer cleared in our account before the equipment leaves the yard.
Terms set by Gas Equipment 4 Sale.
