Used Gemini 125 HPSS CNG Gas Compressor – 4 Stage, 300 CFM, 125 HP, Complete System with Cascade, Dryer, Dispensers

Used- Gemini Gas Compressor, Model 125 HPSS, 4 Stage 300 CFM. CNG (Compressed Natural Gas) compressor system includes a four-stage, water-cooled, reciprocating compressor designed for efficient gas compression up to high pressures. U.S. Motors 125 HP, 1760 RPM, 460 Volt motor (S/N X783119) and includes an MK-AJ 24" recapture tank (S/N 9605). It is equipped with an EI C36-0527 cooler (S/N 93483) and a three-cylinder ASME cascade system, each cylinder measuring 20" x 11'6", rated for 5,000 psig and 5,711 cu. ft., with serial numbers 43338, 43339, and 43340. The unit utilizes a Marcum 11 Valve Electro-Pneumatic PMV/SMV priority/sequence panel for flow control. Compression is handled by a Quincy F340-80 air compressor rated at 7.5 HP, 460 Volt, with a discharge aftercooler (S/N 6019514). Drying is managed by a Wilkerson DE3 Twin Tower Heatless Dryer housed in a NEMA 4 enclosure (S/N 4339311). Fuel dispensing is facilitated by two DVCO 2020D dispensers with Hansen nozzles, serial numbers 930034 and 930037.and includes an air-cooled aftercooler, inter-stage separators, and safety relief valves on all stages. The compressor is skid-mounted with an integrated control panel for monitoring and automation, and it is designed for continuous-duty operation. Suitable for vehicle fueling stations or industrial applications, the unit ensures reliable performance with built-in protection systems.

ManufacturerGemini
ModelHPSS-125
CategoryCompressors
SubcategoryRecipricating Gas High Pressure

Used equipment facts about this machine

Manufacturer Information

Manufacturer Details

Compressor Manufacturer: Gemini
Model: 125 HPSS
Motor: U.S. Motors – 125 HP, 1760 RPM, 460 Volt (S/N X783119)
Compressor Type: 4-stage, water-cooled, reciprocating
Cooling: EI C36-0527 Cooler (S/N 93483)
Cascade Cylinders: 3-cylinder ASME rated @ 5,000 psig, 5,711 cu. ft. each
- Serial Numbers: 43338, 43339, 43340
Recapture Tank: MK-AJ 24", S/N 9605
Valve Panel: Marcum 11 Valve Electro-Pneumatic PMV/SMV Priority/Sequence Control
Dryer: Wilkerson DE3 Twin Tower Heatless Dryer in NEMA 4 Enclosure (S/N 4339311)
Air Compressor: Quincy F340-80, 7.5 HP, 460 Volt (S/N 6019514)
Dispensers: (2) DVCO 2020D with Hansen nozzles (S/N 930034, 930037)
Mounting: Skid-mounted with integrated control panel
Design: Continuous-duty operation with air-cooled aftercooler, inter-stage separators, and safety relief valves on all stages

Product Details

Flow Rate: 300 CFM
Stages: 4-stage compression
Pressure Rating: Up to 5,000 psig
Motor Rating: 125 HP – Heavy-duty performance
System Components Included:
- High-pressure compressor
- Cascade storage system
- Aftercooler
- Electro-pneumatic valve panel
- Heatless regenerative dryer
- Dispensing system with nozzles
- Monitoring and automation panel
Ideal Use: CNG vehicle fueling stations, industrial high-pressure gas applications

What This Product Might Be Good For

Compressed Natural Gas (CNG) vehicle fueling stations
Public or fleet CNG refueling infrastructure
Industrial gas applications needing high-pressure CNG delivery
Backup or auxiliary gas supply for factories
Remote or off-grid operations requiring independent CNG compression
R&D or test facilities using high-pressure gas storage and delivery
Renewable energy storage systems using biogas-to-CNG conversion
Commercial fuel stations needing scalable CNG systems
Facilities with gas recovery or recapture requirements
Great for municipal or transportation authorities expanding green fuel options

Product Details

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