2001 Greenfield / Sulzer CNG Compressor – 196 SCFM | 4,500 PSI | Siemens 125 HP Electric Motor
UsedSpecifications
Description
2001 Greenfield / Sulzer CNG Compressor – 196 SCFM | 4,500 PSI | Siemens 125 HP Electric Motor
This is a 2001 Greenfield / Sulzer C4U 117 oil-lubricated reciprocating CNG compressor rated for 196.4 SCFM at 4500 PSIG discharge pressure. The unit is driven by a 125 HP Siemens TEFC electric motor and designed for continuous-duty operation in compressed natural gas applications. It includes water-cooled cylinders, integrated multi-bank storage configuration, and a fully wired control panel with local start/stop, pressure control, and temperature monitoring.
Performance Specifications
Rated Capacity 196.4 SCFM
Discharge Pressure 4500 PSIG
Suction Pressure 30 PSIG
Flow Rate 180 m³/h (approx. 106 CFM intake)
Speed 1250 RPM
MAWP 5300 PSI @ 450°F
Design Code ASME Section VIII Division 1
Temperature Range –20°F to +450°F
Mechanical Configuration
Compressor Type: Oil-lubricated reciprocating multi-stage high-pressure gas compressor
Duty Rating: Continuous service 40°C ambient
Cylinders and Cooling Water-cooled cylinders and interstage coolers
Compressor Block Heavy-duty cast-steel crankcase
Drive System Direct-coupled Siemens TEFC induction motor (EPACT Efficiency)
Base Frame Integrated welded skid with vibration isolators
Electrical Details (Siemens Motor)
Type RGZ75D
Horsepower 125 HP
Voltage 460V
Current Draw 145A
Speed 1785 RPM
Service Factor 1.15
Weight 1,620 lbs
NEMA Design B
Duty Continuous
Bearing Numbers Drive End 90RU083MO / Opposite End 90DG03JP3
System Components & Features
- Control Panel Fully wired and integrated control with local start/stop pressure control and temperature monitoring
- Storage Integration Configured with multi-bank gas storage system, including Low Bank (P7,) Middle Bank (P8), High Bank (P9), and Main Line / Blowdown Tank
- Compliance NFPA 52 / CNG Station Standard Classified for Electrical Shock and Fire Safety
- Connection Ports External electrical and process connections per DWG B000-20384-1 and 5000-2960-1
Applications
The Sulzer Burckhardt C4U Natural Gas Compressor Station is engineered for CNG vehicle refueling gas distribution stations, and industrial natural gas recovery systems. Its rugged construction high operating pressure and Siemens EPACT drive motor make it ideal for continuous duty operation in both commercial and utility-scale installations.
Key Features
- High-pressure CNG compression for fast and efficient gas delivery
- Heavy-duty Siemens electric motor ensures reliable performance
- Capable of continuous operation in a wide temperature range
- Compact, industrial-grade design for durability and long service life
- Suitable for integration into fueling skids or standalone compressor packages
Perfect for CNG vehicle fueling stations, natural gas distribution, gas recovery systems, and industrial facilities requiring dependable high-pressure natural gas compression.
Inspection, shipping & payment
Terms set by Gas Equipment 4 Sale.
Price on Request
Have one like this? Sell it on Metal Mountain →
Seller
Gas Equipment 4 Sale
Waxahachie, TX, United States
Business and location confirmed by Metal Mountain.
Questions buyers ask
What capacity and discharge pressure does it actually deliver?
This unit is rated for 196.4 SCFM at 4500 PSIG discharge pressure with 30 PSIG suction. The intake flow rate is approximately 106 CFM (180 m³/h), and MAWP is 5300 PSI at 450°F. The listing does not specify whether these are factory nameplate ratings or field-verified performance figures, so ask the seller for recent flow and pressure test data.
What drive, power and cooling does it require?
The unit is driven by a 125 HP Siemens TEFC motor rated 460V, 145A, 1785 RPM with 1.15 service factor. It requires water cooling for the cylinders and interstage coolers; the listing does not specify required cooling water flow rate, temperature, or quality—request these from the seller along with any heat exchanger specifications. The motor is EPACT efficiency rated for continuous duty at 40°C ambient.
What are the running hours and what has been rebuilt?
The listing does not provide operating hours, maintenance records, or rebuild history. For a 2001 unit, request total run hours, compression cylinder rebuild dates, valve replacement history, piston ring condition, crankshaft bearing inspections, and any motor or control system upgrades. On reciprocating CNG compressors, valves and rings typically need attention every 4,000–8,000 hours depending on gas quality and operating pressure.
What should I inspect on a used compressor before buying?
Prioritize cylinder bore and piston ring wear, valve seat condition, crankcase oil contamination, and bearing clearances—these directly affect compression efficiency and MAWP capability. Inspect interstage cooler tubes for fouling or corrosion, verify motor insulation resistance and bearing condition, and check the control panel for proper pressure shutdown and temperature alarm function. On high-pressure CNG units, request recent hydrostatic test records for the storage banks and verify all ASME stamps are legible, as requalification for 4500 PSIG service is equipment-intensive.
General guidance for this type of equipment. Ask about this specific unit in your inquiry — the seller answers directly.