Gas composition (mol%): Associated gas
Flow rate: 2400-12000Nm ³/d
Intake pressure: 0-0.5 barg
Inlet temperature: ≤ 45 ℃
Exhaust pressure: 10 barg
Main motor power: 75kW
Overall dimensions of the machine: approximately 3500 × 2800 × 1850mm
Whole machine weight: approximately 4.5T
| Quantity: | |
|---|---|
The DFW-6.57 0-0.5-10 Special Gas Compressor, manufactured by Bengbu United Compressor, is a high-performance equipment engineered specifically for efficient handling of associated gas in oil and gas fields. Designed to meet the rigorous demands of industrial gas processing, this compressor combines advanced technology with robust construction to ensure reliable operation across diverse applications.
With a processing capacity of 2400-12000Nm³/d, it operates at an intake pressure of 0-0.5 barg and an exhaust pressure of 10 barg, making it ideal for scenarios requiring stable gas compression. The unit is powered by a 75kW main motor and features compact overall dimensions of approximately 3500 × 2800 × 1850mm, with a total weight of around 4.5T, ensuring it can fit into various industrial layouts without excessive space requirements.
Whether used in LNG receiving stations, associated gas gathering systems, industrial fuel supply, or environmental governance projects, this special gas compressor delivers consistent performance, helping reduce emissions and enhance energy efficiency.
The DFW-6.57 0-0.5-10 Special Gas Compressor is built for high efficiency and long-term reliability. Its advanced design minimizes energy loss, ensuring optimal gas compression with minimal power consumption. The unit boasts a high degree of automation, reducing manual intervention and operational errors.
Equipped with precision-engineered components, it operates with low vibration and noise levels, creating a safer and more comfortable working environment. The oil-free lubrication system prevents medium contamination, making it suitable for handling sensitive gases like associated gas, where purity is critical.
This compressor adopts a D-type (symmetrical balance) structure, featuring 2-row, 3-stage compression for consistent pressure output. The crankcase, made from high-quality gray cast iron, serves as both a structural base and an oil storage unit, with integrated oil drain valves and observation ports for easy maintenance.
A dual intermediate body design ensures that oil from the crankcase cannot enter the cylinder, protecting the gas medium from contamination. Cylinders and cylinder heads are constructed from gray cast iron or forged steel, with axially arranged air valves for efficient gas flow. This rugged build ensures durability even in harsh industrial
conditions.
Recognizing that industrial needs vary, the DFW-6.57 0-0.5-10 Special Gas Compressor offers extensive customization. Clients can choose from various structural forms (M-type, S-type, W-type, V-type, Z-type) and cooling methods (water-cooled, air-cooled, mixed cooling) based on their environment.
Installation options include fixed, mobile, skid-mounted, or cabin-type setups, while drive modes range from motor to diesel engine. Packaging and transportation are also tailored to requirements, with options for sea, air, or land transport, and packaging in metal cabins, wooden boxes, or soundproof cabins.
Backed by 4 key patents—including a piston rod thread protective sleeve (ZL 2017 2 1907021.7) and a piston ring support device (ZL 2018 2 0294776.2)—this compressor ensures technical excellence. It has been successfully deployed in projects worldwide, such as the Alibek oilfield in Southern Kazakhstan, Lanzhou Petrochemical’s ethylene production facility, and Ningxia Zhongneng new materials engineering, demonstrating its adaptability to global industrial standards.
Application Area
Associated gas compressors are specifically designed for efficient utilization of associated gas in oil and gas fields.
LNG receiving station/storage tank: recover BOG to reduce tank pressure and avoid flare venting
Associated gas gathering and transportation system: providing power for pipeline pressurization and transportation, adapting to complex terrain conditions
Industrial fuel supply: providing stable gas source for generator sets/boilers, improving energy utilization efficiency
Environmental governance field: Reduce greenhouse gas emissions and help achieve carbon neutrality goals
Highlight Advantages
 |  |  |  |
| 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
The compressor adopts D-type (symmetrical balance type), water-cooled, oil-free lubrication, reciprocating piston type, 2-row 3-stage compression, and the entire unit is supplied in a modular manner.
The compressor crankcase is made of gray cast iron and has four holes of different diameters for installing crosshead slides, bearings, and bearing seats. The lower part of the crankcase can store lubricating oil for the compressor to lubricate; The upper surface of the crankcase has an interface for installing a fuel inlet (breathing port) cover plate; In addition, the crankcase also has spare interfaces such as oil drain port, oil gauge observation port, bearing seat oil injection port, and installation oil temperature measurement port. The oil drain port of the crankcase has been connected to the outside of the compartment and is equipped with a manual ball valve for oil discharge from the crankcase.
The middle body of the compressor is a double middle body structure, ensuring that the middle body space is greater than one stroke, preventing compressor oil from entering the cylinder from the crankcase, thus ensuring that compressor oil does not contaminate the medium. The material of the compressor cylinder is gray cast iron/forged steel, and it adopts an oil-free lubrication design, which does not require oil lubrication. The cylinder head material is gray cast iron/forged steel, and the air valves are arranged axially on the cylinder head.
 |  |
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:
 |  |  |
| Metal cabin | Wooden box | Soundproof cabin |
Project Case
 |  |  |
| Lanzhou petrochemical company 240000 tonsyear ethylene production capacity restoration - adding butadiene and 1-butene unloading facilities project | Alibek oilfield in Southern Kazakhstan | Procurement of Molecular Sieve Dehydration, Ethylene Glycol Regeneration and Injection Device, and Fuel Gas Skid in Akimom Gas Field |
Technical Parameter
| No. | Model | Medium | Flow rate (Nm3/h) | Exhaust pressure MPa（G) | Motor power (kW) | Cooling method | Overall dimensions (mm) | Weights (kg) | |
| 1 | DWF-12.4/（9～12）-14 | Carbon dioxide | 6400 | 1.4 | 185 | Air-cooled | 6000×2700×2200 | 10000 | |
| 2 | VWF-2.86/5-16 | Nitrogen | 895 | 1.6 | 55 | Air-cooled | 3200×2200×1750 | 3500 | |
| 3 | ZWF-0.96/5 | Hydrogen chloride | 55 | 0.5 | 11 | Air-cooled | 2000×1500×2000 | 1000 | |
| 4 | DFW-1. 13/0.3-34 | Flash Vapour | 75 | 0.03～3.4 | 18.5 | Air-cooled | 4500×3200×2150 | 5600 | |
| 5 | DFW-6.5/(0～0.5)-10 | Associated gas | 50～100 | 1 | 75 | Air-cooled | 3500×2800×1850 | 4500 | |
| 6 | DFW-4.2/(0.2～1.5)-12 | BOG | 260～540 | 1.2 | 55 | Air-cooled | 3500×3000×2000 | 5500 | |
| 7 | DW-2.45/(6～7)-100 | Carbon Monoxide | 900 | 10 | 160 | Mixed cooling | 6500×3200×1700 | 10000 | |
| 8 | DW-19.8/0.5-7.25 | Methylene chloride | 3.5 | 0.725 | 160 | Mixed cooling | 5200×3000×2350 | 8000 | |
| 9 | DW-8.6/(0～0.2)-8 | Chloromethane | 436 | 0.8 | 75 | Mixed cooling | 3200×2400×1600 | 4500 | |
| 10 | DW-2.4/2.5-11 H | elium Recovery Ga | 450 | 1.1 | 37 | Mixed cooling | 3000×2500×1800 | 3000 | |
| 11 | DW-14/(0～0.2)-25 | Raw material gas | 800 | 2.5 | 160 | Water-cooled | 4800×3200×1915 | 10000 | |
| 12 | VW-8/18 | Vinylidene fluoride | 418 | 1.8 | 75 | Water-cooled | 3700×2000×1700 | 4500 | |
| 13 | VWD-3.2/(0～0.2)-40 | Biogas | 230 | 4.0 | 45 | Water-cooled | 6000×2500×2650 | 8000 | |
| 14 | VW-9/6 | Ethyl chloride | 470 | 0.6 | 55 | Water-cooled | 2800×1720×1700 | 3500 | |
| 15 | DW-2.4/(18～25)-50 | Raw material gas | 2900 | 5.0 | 160 | Water-cooled | 4300×3000×1540 | 4500 | |
| 16 | VW-5.6/（0～6）-6 | Isobutylene | 1650 | 0.6 | 45 | Water-cooled | 2900×1900×1600 | 3500 | |
| 17 | VW-3.8/3.5 | Mixed gases | 200 | 0.35 | 18.5 | Water-cooled | 2200×1945×1600 | 2000 | |
| 18 | ZW-1.7/3.5 | Vinyl chloride | 100 | 0.35 | 15 | Water-cooled | 2700×1600×2068 | 2000 | |
| 19 | VW-0.85/(0～14)-40 | Refrigerant | 300 | 4.0 | 55 | Water-cooled | 4500×2300×1780 | 5500 | |
| 20 | DW-3.78/(8～13)-(16～24) | Ammonia | 2700 | 1.6～2.4 | 75 | Water-cooled | 3200×2000×1700 | 3500 | |
| 21 | DW-5/7 | Chloromethane | 355 | 0.7 | 37 | Water-cooled | 3500×2600×1700 | 4000 | |
| 22 | DW-9.2/3 | on-condensable gas | 653 | 0.3 | 45 | Water-cooled | 3500×3200×1680 | 6800 | |
| 23 | DW- 16/(2.8～3.2)-7.6 | Carbon rich gas | 3000～3400 | 0.76 | 132 | Water-cooled | 4500×3400×2750 | 12000 | |
| 24 | DWD-2.9/20-50 | Wellhead gas | 3334 | 2.0～5.0 | 185 | Water-cooled | 6000×3500×3000 | 14000 | |
| 25 | DW-4/0.5-4 | -pentadiene, nitroge | 300 | 0.4 | 30 | Water-cooled | 3000×2800×1700 | 3500 | |
| 26 | DW-8.7/0.02-15 | Tail gas | 500 | 1.5 | 90 | Water-cooled | 4500×3000×1800 | 10000 | |
| 27 | DW-8.8/0.2-6 | Desorption gas | 450 | 0.6 | 75 | Water-cooled | 4000×3000×2150 | 8000 | |
| 28 | DW-1.3/0.2-18 | Metafluoroethylene | 80 | 1.8 | 18.5 | Water-cooled | 3500×2500×1570 | 3500 | |
| 29 | DW-12.5/(0. 1～0. 15)-18 | uoromonochloroeth | 887 | 1.8 | 132 | Water-cooled | 5500×3200×2500 | 14000 | |
| 30 | DW-2.9/5 | Gas | 206 | 0.5 | 22 | Water-cooled | 3200×2800×1800 | 3000 | |
Project Case
 |  |  |
| Beijing Hongke Qingneng Technology Co., Ltd. associated gas compressor for Shanxi Yan'an 60000 m3 project | Lanzhou petrochemical company 240000 tonsyear ethylene production capacity restoration - adding butadiene and 1-butene unloading facilities project | Ningxia Zhongneng new materials engineering |
It is primarily designed for associated gas but can be customized to handle other special gases based on client requirements for purity, flow rate, and pressure.
The compressor operates efficiently with an inlet temperature of ≤45℃, ensuring stability even in high-temperature industrial settings.
Packaging options include metal cabins, wooden boxes, or soundproof cabins, with transportation via sea, air, or land—tailored to the client’s location and logistics needs.
Yes, Bengbu United Compressor provides comprehensive after-sales service, including installation guidance, maintenance training, and technical support to ensure optimal performance throughout the compressor’s lifespan.
The DFW-6.57 0-0.5-10 Special Gas Compressor, manufactured by Bengbu United Compressor, is a high-performance equipment engineered specifically for efficient handling of associated gas in oil and gas fields. Designed to meet the rigorous demands of industrial gas processing, this compressor combines advanced technology with robust construction to ensure reliable operation across diverse applications.
With a processing capacity of 2400-12000Nm³/d, it operates at an intake pressure of 0-0.5 barg and an exhaust pressure of 10 barg, making it ideal for scenarios requiring stable gas compression. The unit is powered by a 75kW main motor and features compact overall dimensions of approximately 3500 × 2800 × 1850mm, with a total weight of around 4.5T, ensuring it can fit into various industrial layouts without excessive space requirements.
Whether used in LNG receiving stations, associated gas gathering systems, industrial fuel supply, or environmental governance projects, this special gas compressor delivers consistent performance, helping reduce emissions and enhance energy efficiency.
The DFW-6.57 0-0.5-10 Special Gas Compressor is built for high efficiency and long-term reliability. Its advanced design minimizes energy loss, ensuring optimal gas compression with minimal power consumption. The unit boasts a high degree of automation, reducing manual intervention and operational errors.
Equipped with precision-engineered components, it operates with low vibration and noise levels, creating a safer and more comfortable working environment. The oil-free lubrication system prevents medium contamination, making it suitable for handling sensitive gases like associated gas, where purity is critical.
This compressor adopts a D-type (symmetrical balance) structure, featuring 2-row, 3-stage compression for consistent pressure output. The crankcase, made from high-quality gray cast iron, serves as both a structural base and an oil storage unit, with integrated oil drain valves and observation ports for easy maintenance.
A dual intermediate body design ensures that oil from the crankcase cannot enter the cylinder, protecting the gas medium from contamination. Cylinders and cylinder heads are constructed from gray cast iron or forged steel, with axially arranged air valves for efficient gas flow. This rugged build ensures durability even in harsh industrial
conditions.
Recognizing that industrial needs vary, the DFW-6.57 0-0.5-10 Special Gas Compressor offers extensive customization. Clients can choose from various structural forms (M-type, S-type, W-type, V-type, Z-type) and cooling methods (water-cooled, air-cooled, mixed cooling) based on their environment.
Installation options include fixed, mobile, skid-mounted, or cabin-type setups, while drive modes range from motor to diesel engine. Packaging and transportation are also tailored to requirements, with options for sea, air, or land transport, and packaging in metal cabins, wooden boxes, or soundproof cabins.
Backed by 4 key patents—including a piston rod thread protective sleeve (ZL 2017 2 1907021.7) and a piston ring support device (ZL 2018 2 0294776.2)—this compressor ensures technical excellence. It has been successfully deployed in projects worldwide, such as the Alibek oilfield in Southern Kazakhstan, Lanzhou Petrochemical’s ethylene production facility, and Ningxia Zhongneng new materials engineering, demonstrating its adaptability to global industrial standards.
Application Area
Associated gas compressors are specifically designed for efficient utilization of associated gas in oil and gas fields.
LNG receiving station/storage tank: recover BOG to reduce tank pressure and avoid flare venting
Associated gas gathering and transportation system: providing power for pipeline pressurization and transportation, adapting to complex terrain conditions
Industrial fuel supply: providing stable gas source for generator sets/boilers, improving energy utilization efficiency
Environmental governance field: Reduce greenhouse gas emissions and help achieve carbon neutrality goals
Highlight Advantages
| | | |
| 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
The compressor adopts D-type (symmetrical balance type), water-cooled, oil-free lubrication, reciprocating piston type, 2-row 3-stage compression, and the entire unit is supplied in a modular manner.
The compressor crankcase is made of gray cast iron and has four holes of different diameters for installing crosshead slides, bearings, and bearing seats. The lower part of the crankcase can store lubricating oil for the compressor to lubricate; The upper surface of the crankcase has an interface for installing a fuel inlet (breathing port) cover plate; In addition, the crankcase also has spare interfaces such as oil drain port, oil gauge observation port, bearing seat oil injection port, and installation oil temperature measurement port. The oil drain port of the crankcase has been connected to the outside of the compartment and is equipped with a manual ball valve for oil discharge from the crankcase.
The middle body of the compressor is a double middle body structure, ensuring that the middle body space is greater than one stroke, preventing compressor oil from entering the cylinder from the crankcase, thus ensuring that compressor oil does not contaminate the medium. The material of the compressor cylinder is gray cast iron/forged steel, and it adopts an oil-free lubrication design, which does not require oil lubrication. The cylinder head material is gray cast iron/forged steel, and the air valves are arranged axially on the cylinder head.
| |
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:
| | |
| Metal cabin | Wooden box | Soundproof cabin |
Project Case
| | |
| Lanzhou petrochemical company 240000 tonsyear ethylene production capacity restoration - adding butadiene and 1-butene unloading facilities project | Alibek oilfield in Southern Kazakhstan | Procurement of Molecular Sieve Dehydration, Ethylene Glycol Regeneration and Injection Device, and Fuel Gas Skid in Akimom Gas Field |
Technical Parameter
| No. | Model | Medium | Flow rate (Nm3/h) | Exhaust pressure MPa（G) | Motor power (kW) | Cooling method | Overall dimensions (mm) | Weights (kg) | |
| 1 | DWF-12.4/（9～12）-14 | Carbon dioxide | 6400 | 1.4 | 185 | Air-cooled | 6000×2700×2200 | 10000 | |
| 2 | VWF-2.86/5-16 | Nitrogen | 895 | 1.6 | 55 | Air-cooled | 3200×2200×1750 | 3500 | |
| 3 | ZWF-0.96/5 | Hydrogen chloride | 55 | 0.5 | 11 | Air-cooled | 2000×1500×2000 | 1000 | |
| 4 | DFW-1. 13/0.3-34 | Flash Vapour | 75 | 0.03～3.4 | 18.5 | Air-cooled | 4500×3200×2150 | 5600 | |
| 5 | DFW-6.5/(0～0.5)-10 | Associated gas | 50～100 | 1 | 75 | Air-cooled | 3500×2800×1850 | 4500 | |
| 6 | DFW-4.2/(0.2～1.5)-12 | BOG | 260～540 | 1.2 | 55 | Air-cooled | 3500×3000×2000 | 5500 | |
| 7 | DW-2.45/(6～7)-100 | Carbon Monoxide | 900 | 10 | 160 | Mixed cooling | 6500×3200×1700 | 10000 | |
| 8 | DW-19.8/0.5-7.25 | Methylene chloride | 3.5 | 0.725 | 160 | Mixed cooling | 5200×3000×2350 | 8000 | |
| 9 | DW-8.6/(0～0.2)-8 | Chloromethane | 436 | 0.8 | 75 | Mixed cooling | 3200×2400×1600 | 4500 | |
| 10 | DW-2.4/2.5-11 H | elium Recovery Ga | 450 | 1.1 | 37 | Mixed cooling | 3000×2500×1800 | 3000 | |
| 11 | DW-14/(0～0.2)-25 | Raw material gas | 800 | 2.5 | 160 | Water-cooled | 4800×3200×1915 | 10000 | |
| 12 | VW-8/18 | Vinylidene fluoride | 418 | 1.8 | 75 | Water-cooled | 3700×2000×1700 | 4500 | |
| 13 | VWD-3.2/(0～0.2)-40 | Biogas | 230 | 4.0 | 45 | Water-cooled | 6000×2500×2650 | 8000 | |
| 14 | VW-9/6 | Ethyl chloride | 470 | 0.6 | 55 | Water-cooled | 2800×1720×1700 | 3500 | |
| 15 | DW-2.4/(18～25)-50 | Raw material gas | 2900 | 5.0 | 160 | Water-cooled | 4300×3000×1540 | 4500 | |
| 16 | VW-5.6/（0～6）-6 | Isobutylene | 1650 | 0.6 | 45 | Water-cooled | 2900×1900×1600 | 3500 | |
| 17 | VW-3.8/3.5 | Mixed gases | 200 | 0.35 | 18.5 | Water-cooled | 2200×1945×1600 | 2000 | |
| 18 | ZW-1.7/3.5 | Vinyl chloride | 100 | 0.35 | 15 | Water-cooled | 2700×1600×2068 | 2000 | |
| 19 | VW-0.85/(0～14)-40 | Refrigerant | 300 | 4.0 | 55 | Water-cooled | 4500×2300×1780 | 5500 | |
| 20 | DW-3.78/(8～13)-(16～24) | Ammonia | 2700 | 1.6～2.4 | 75 | Water-cooled | 3200×2000×1700 | 3500 | |
| 21 | DW-5/7 | Chloromethane | 355 | 0.7 | 37 | Water-cooled | 3500×2600×1700 | 4000 | |
| 22 | DW-9.2/3 | on-condensable gas | 653 | 0.3 | 45 | Water-cooled | 3500×3200×1680 | 6800 | |
| 23 | DW- 16/(2.8～3.2)-7.6 | Carbon rich gas | 3000～3400 | 0.76 | 132 | Water-cooled | 4500×3400×2750 | 12000 | |
| 24 | DWD-2.9/20-50 | Wellhead gas | 3334 | 2.0～5.0 | 185 | Water-cooled | 6000×3500×3000 | 14000 | |
| 25 | DW-4/0.5-4 | -pentadiene, nitroge | 300 | 0.4 | 30 | Water-cooled | 3000×2800×1700 | 3500 | |
| 26 | DW-8.7/0.02-15 | Tail gas | 500 | 1.5 | 90 | Water-cooled | 4500×3000×1800 | 10000 | |
| 27 | DW-8.8/0.2-6 | Desorption gas | 450 | 0.6 | 75 | Water-cooled | 4000×3000×2150 | 8000 | |
| 28 | DW-1.3/0.2-18 | Metafluoroethylene | 80 | 1.8 | 18.5 | Water-cooled | 3500×2500×1570 | 3500 | |
| 29 | DW-12.5/(0. 1～0. 15)-18 | uoromonochloroeth | 887 | 1.8 | 132 | Water-cooled | 5500×3200×2500 | 14000 | |
| 30 | DW-2.9/5 | Gas | 206 | 0.5 | 22 | Water-cooled | 3200×2800×1800 | 3000 | |
Project Case
| | |
| Beijing Hongke Qingneng Technology Co., Ltd. associated gas compressor for Shanxi Yan'an 60000 m3 project | Lanzhou petrochemical company 240000 tonsyear ethylene production capacity restoration - adding butadiene and 1-butene unloading facilities project | Ningxia Zhongneng new materials engineering |
It is primarily designed for associated gas but can be customized to handle other special gases based on client requirements for purity, flow rate, and pressure.
The compressor operates efficiently with an inlet temperature of ≤45℃, ensuring stability even in high-temperature industrial settings.
Packaging options include metal cabins, wooden boxes, or soundproof cabins, with transportation via sea, air, or land—tailored to the client’s location and logistics needs.
Yes, Bengbu United Compressor provides comprehensive after-sales service, including installation guidance, maintenance training, and technical support to ensure optimal performance throughout the compressor’s lifespan.
