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The DFW-3.7/(8~12)-52 D-type air-cooled oil-free reciprocating compressor from Bengbu United Compressor adopts modular 2-row 3-stage compression for natural gas treatment.
It handles 50000-70000 Nm³/d gas, with 0.8~1.2MPa.G inlet, 5.2MPa.G discharge and a 200kW motor, fit for oil fields, shale gas and coalbed methane.
Approx. 6000×3400×2300 mm, around 15T skid-mounted unit, easy to transport and install for gas boosting and associated gas recovery.
This D-type air-cooled oil-free natural gas compressor delivers high-efficiency, stable 24/7 operation. The oil-free system guarantees pure gas output without medium contamination, ideal for pipeline and field gas treatment. Automatic operation reduces manual errors and energy consumption.
Built with fewer wearing parts, the unit features low vibration and low noise. Its gray cast iron crankcase comes with complete service ports for oil draining and temperature monitoring, enabling easy daily maintenance and lowering operating costs.
All core and auxiliary parts are pre-integrated on one skid. It requires no complicated assembly, supporting fast installation and commissioning. Flexible for deployment in oilfields, remote sites and pipeline stations.
Equipped with multiple professional patents including piston rod protection, piston ring support and double-compartment structure. Exclusive patented structures greatly improve operational stability and extend the compressor’s service life.
Application Area
Oil & gas field compressors handle wellhead pressurization, gas gathering and associated gas recovery, fit for conventional gas, shale gas and coalbed methane.
As core pipeline equipment, this D-type unit supplies multi-stage pressurization to offset pipeline pressure loss for long-distance natural gas transport.
Highlight Advantages
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| Has high efficiency, strong reliability, and high degree of automation; | Less vulnerable parts, low vibration, low noise, and easy operation and maintenance | The main and auxiliary equipment of the compressor are all installed on the sled, running smoothly and reliably. The overall sled installation is convenient for the transportation and installation of the compressor | The entire machine components are carefully designed |
Patent Certificates
 | A piston rod thread protective sleeve ZL 2017 2 1907021.7 | | A piston ring support device ZL 2018 2 0294776.2 | |
| A range piston ZL 2017 2 190177.0 for symmetrical balanced compressors | | Integrated long short double compartment ZL 2018 2 0294762.0 |
Whole Machine Description
This D-type symmetrical balanced reciprocating compressor is air-cooled, oil-free, 2-row 3-stage compression with modular delivery.
Gray cast iron crankcase reserves multiple ports for oil filling, draining, level observation and temperature detection, fitted with an external manual drain ball valve.
Double middle body blocks lubricant from polluting gas medium. Cast iron/forged steel cylinder and cylinder head adopt oil-free design with axially arranged air valves.
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The compressor in this picture is a non-standard product. The product provides independent solutions tailored to customers' specific usage requirements (flow rate/purity/pressure, usage environment, main purpose, and customer specific requirements), from design to product customization.
Structural form: D-type/M-type/S-type/W-type/V-type/Z-type
Cooling method: water cooling/air cooling/mixed cooling
Installation form: fixed/mobile/pry mounted/cabin type
Drive mode: motor drive/diesel engine start
Transportation: sea/air/land
Packaging:
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| Metal cabin | Wooden box | Soundproof cabin |
Technical Parameter
| No. | Model | Medium | Flow rate (Nm3/h) | Exhaust pressure MPa | Motor power (kW) | Cooling method | Overall dimensions (mm) | Weights (kg) | |
| 1 | VW-3.5/1-18 | Natural gas | 420 | 1.8 | 55 | Closed water coole | d 4000×1800×2200 | 5000 | |
| 2 | DF-0.4/（2～6）-250 | Natural gas | 160 | 25 | 30 | Air-cooled | 2800×1800×1500 | 3500 | |
| 3 | DFD-1.36/(30～50)-250 | Natural gas | 4167 | 25 | 315 | Air-cooled | 8500×3700×4100 | 22000 | |
| 4 | DFW-3.7/(8～12)-52 | Natural gas | 2083 | 5.2 | 200 | Air-cooled | 6000×3400×2300 | 15000 | |
| 5 | DFW-5.3/3-15 | Natural gas | 1100 | 1.5 | 90 | Air-cooled | 6500×3000×2500 | 6000 | |
| 6 | DFWD-5.7/(0. 1～0.5)-40 | Natural gas | 75～365 | 4 | 90 | Air-cooled | 7000×3400×2500 | 100000 | |
| 7 | DFWD-5/(1.5～3.6)-14.2 | Natural gas | 700 | 1.42 | 90 | Air-cooled | 5000×3200×2200 | 6500 | |
| 8 | DW-9/3-35 | Natural gas | 2000 | 3.5 | 250 | Air-cooled | 4800×4000×2000 | 13000 | |
| 9 | MFWD-7/(10～30)-35 | Natural gas | 6250 | 3.5 | 315 | Air-cooled | 6300×3200×3200 | 16000 | |
| 10 | VF-1.4/(5～7)-250 | Natural gas | 500 | 25 | 110 | Air-cooled | 5000×2400×2100 | 6800 | |
Project Case
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| Ukraine Project | Alibek oilfield in Southern Kazakhstan | Ningxia Zhongneng new materials engineering |
This D-type natural gas compressor serves oil & gas fields and long-distance pipelines for wellhead pressurization, associated gas recovery, shale gas and coalbed methane exploitation.
Yes. Customizable flow, pressure, gas purity, with optional structures, cooling, installation and drive modes for various field conditions.
Gray cast iron crankcase; cast iron/forged steel cylinder & cylinder head. Double middle body stops oil contamination to keep gas pure.
Yes. Global field cases: Kazakhstan Alibek oilfield, Ukraine gas project, Ningxia Zhongneng new materials project in China.
We offer installation guidance, maintenance training and spare parts. Reach us via WhatsApp (+8618955218331), phone (+86-13955206799) or email (bblhcompressor@gmail.com).
