| Quantity: | |
|---|---|
The VW-6.6/(2~3)-7 Natural Gas Compressor, produced by Bengbu United Compressor Manufacturing Co., Ltd. (China), is a high-performance reciprocating piston compressor designed for natural gas pressurization in industrial refined reduction systems. It is developed to reliably and stably boost natural gas pressure, serving as a core equipment in industrial technological upgrading and relocation projects, and ensuring the smooth operation of industrial refined reduction processes.
Key performance indicators reflect its suitability for industrial operations: it achieves an exhaust flow rate of 1200Nm³/h (based on an inlet pressure of 0.25MPa.G, with flow rate changes caused by pressure fluctuations handled by the return system set by the buyer), operates within an inlet pressure range of 0.20~0.30MPa.G (gauge pressure) at normal temperature, and delivers an exhaust pressure of 0.7MPa.G (gauge pressure). Driven by a 75kW main motor, it features a compact overall design with dimensions of 3000×2200×2100mm and a total weight of approximately 4000kg, allowing for convenient integration into on-site refined reduction systems. Its robust structural design ensures stable operation even under intermittent working conditions with frequent start-ups and stops.
Engineered as a V-type, open water-cooled, oil-free lubrication reciprocating piston compressor, the VW-6.6/(2~3)-7 adopts a single-stage compression, two-cylinder configuration and is supplied as an integrated skid-mounted unit. Key components are selected for durability and stable performance:
Cylinders & Cylinder Heads: Both cylinders and cylinder heads are made of HT250 gray cast iron, with an oil-free lubrication design to prevent oil contamination of the natural gas medium and meet the purity requirements of industrial refined reduction processes.
Packing & Piston Components: The packing uses PTFE-filled materials, and the piston is equipped with wear-resistant piston rings and guide rings. These components effectively enhance the compressor's sealing performance and extend the service life of vulnerable parts.
Crankshaft & Connecting Rod: The crankshaft is forged from high-quality carbon steel, with crankpins subjected to induction hardening to improve wear resistance; the connecting rod is made of 40Cr forged steel, ensuring reliable power transmission during long-term operation.
Stable Operation & High Safety: The open water-cooling system efficiently controls the exhaust temperature (≤50℃), and the pressure lubrication system (for the crankshaft, connecting rod, and crosshead) ensures adequate lubrication of moving parts. An explosion-proof PLC control cabinet with a touch screen enables real-time monitoring of operating parameters, as well as automatic alarm and shutdown protection in case of faults, meeting the safety requirements of explosive environments.
Easy Installation & Maintenance: The integrated skid-mounted base provides sufficient strength and rigidity, simplifying on-site installation; the inclusion of a manual turning device and standardized spare parts (such as maintenance kits and oil filters) facilitates daily maintenance and reduces equipment downtime.
Strong Environmental Adaptability: Designed to adapt to complex industrial site conditions (including temperature fluctuations and specific seismic requirements), the compressor can operate stably under varying temperature and environmental conditions, ensuring the continuous supply of natural gas for industrial processes.
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 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 | 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 | |
| 11 | VF-2.2/（0.5～0.7）-60 | Natural gas | 180 | 6 | 45 | Air-cooled | 6000×2500×2400 | 8000 | |
| 12 | VWF-1.65/(25～35)-50 | Natural gas | 2500 | 5 | 90 | Air-cooled | 4500×2500×2100 | 5500 | |
| 13 | VWF-11/（0.5～2）-14 | Natural gas | 1000 | 1.4 | 160 | Air-cooled | 5200×2000×2200 | 6000 | |
| 14 | VWF-13.6/(0.05～0.2)-6 | Natural gas | 800 | 0.6 | 90 | Air-cooled | 5000×2200×2200 | 6000 | |
| 15 | VWF-8/（0.6～3）-12 | Natural gas | 1900 | 1.2 | 132 | Air-cooled | 5800×2300×2450 | 7800 | |
| 16 | VWF-9/0.05-14 | Natural gas | 500 | 1.4 | 90 | Air-cooled | 3800×2000×1600 | 3500 | |
| 17 | DFW-15.9/（0.4～1）-16 | Natural gas | 1330 | 1.6 | 250 | Mixed cooling | 5000×3400×2000 | 12000 | |
| 18 | VWFD-7.5/(0.5～1)-3 | Natural gas | 20000 | 0.3 | 45 | Mixed cooling | 4000×2300×2300 | 400 | |
| 19 | MFWD-6.0/(25～45)-45 | Natural gas | 20000～36000 | 4.5 | 250 | Mixed cooling | 6500×3000×3200 | 17000 | |
| 20 | DW-2.8/(16～25)-50 | Natural gas | 2500 | 5.0 | 160 | Water-cooled | 4300×3000×1600 | 7000 | |
| 21 | DW-3/15-52 | Natural gas | 2550 | 5.2 | 185 | Water-cooled | 3800×3400×2300 | 9000 | |
| 22 | DW-4.9/(1.5～2.5)-22 | Natural gas | 700 | 2.2 | 110 | Water-cooled | 3800×2700×1800 | 6000 | |
| 23 | DW-6.9/（7～15）-20 | Natural gas | 4000 | 2.0 | 160 | Water-cooled | 3600×2300×1600 | 4500 | |
| 24 | DW-1.92/2.5-22 | Natural gas | 320 | 2.2 | 45 | Water-cooled | 3200×3000×1700 | 3000 | |
| 25 | DW-7.6/1.5-25 | Natural gas | 1000 | 2.5 | 160 | Water-cooled | 5200×3200×2200 | 10000 | |
| 26 | DWD-8/4-10 | Natural gas | 2100 | 1.0 | 110 | Water-cooled | 5800×3300×2300 | 8800 | |
| 27 | MW-19.2/(1～17)-(17～25) | Natural gas | 2000 | 1.7～2.5 | 400 | Water-cooled | 7200×3600×2100 | 21000 | |
| 28 | VW-8.4/(2～4)-20 | Natural gas | 1500 | 2 | 185 | Water-cooled | 5500×2200×2700 | 6000 | |
| 29 | VW-9. 1/(0.05～0. 1)-5型 | Natural gas | 500 | 0.5 | 55 | Water-cooled | 3500×2200×1800 | 5000 | |
| 30 | ZW-1.6/（35～52）-(39～56) | Natural gas | 4000 | 3.9～5.6 | 37 | Water-cooled | 3200×1700×1800 | 2500 | |
It is specifically designed for natural gas (as clearly specified in the technical agreement that the medium of the compressor is natural gas). It is not suitable for compressing other gases such as hydrogen, oxygen or special industrial gases. If there is a demand for compressing other gases, it is recommended to consult the supplier for customized gas compressor solutions.
Due to its reasonable structural design and high-quality component selection (such as wear-resistant piston rings, guide rings and PTFE-filled packing), routine maintenance (including checking the condition of filters, inspecting seals, and testing the performance of safety valves) is generally required every 3,000-4,000 operating hours. In addition, the key vulnerable parts (such as piston rings, valve plates) have a service life of no less than 6,000 hours, and the oil-free lubrication design for cylinders and packing avoids frequent lubricant replacement, further reducing maintenance frequency.
Yes, the compressor complies with a series of national and industrial technical standards. For example, it meets the requirements of API 618 (Reciprocating Compressors for Petroleum, Chemical and Gas Industry Facilities), GB/T 3853 (Acceptance Tests for Positive Displacement Compressors), and GB 150 (Pressure Vessels) for pressure components such as buffer tanks. At the same time, its explosion-proof parts (such as explosion-proof motor, explosion-proof PLC control cabinet) meet the requirements of GB 3836 series standards, ensuring safe and compliant operation in explosive environments.
Transportation methods: The compressor can be transported by land (truck), and if there is a need for long-distance or cross-regional transportation, sea or railway transportation can also be selected. The specific transportation method can be determined through negotiation between the supplier and the buyer according to the actual project location and transportation conditions.
Packaging requirements: The packaging of the compressor shall comply with GB/T 13384 (General Technical Conditions for Packaging of Mechanical and Electrical Products) and relevant railway, highway transportation regulations. The whole machine (including the skid-mounted base, control cabinet and buffer tank) is packaged with moisture-proof, rain-proof and anti-vibration measures (such as using moisture-proof films, shock-absorbing pads). For key components (such as spare parts, precision instruments), they are packed in wooden boxes or metal boxes separately to avoid damage during transportation.
The supplier provides comprehensive after-sales technical support, including on-site guidance for equipment installation and commissioning, training for the buyer's operation and maintenance personnel (covering equipment operation, daily maintenance, fault diagnosis and handling), and supply of spare parts. During the quality guarantee period (12 months after the completion of equipment performance acceptance or 18 months after the arrival acceptance, whichever comes first), if the equipment is damaged due to the supplier's manufacturing quality, the supplier will provide free repair or replacement of parts, and send technical personnel to the buyer's site for handling within 48 hours after receiving the notice.
The VW-6.6/(2~3)-7 Natural Gas Compressor, produced by Bengbu United Compressor Manufacturing Co., Ltd. (China), is a high-performance reciprocating piston compressor designed for natural gas pressurization in industrial refined reduction systems. It is developed to reliably and stably boost natural gas pressure, serving as a core equipment in industrial technological upgrading and relocation projects, and ensuring the smooth operation of industrial refined reduction processes.
Key performance indicators reflect its suitability for industrial operations: it achieves an exhaust flow rate of 1200Nm³/h (based on an inlet pressure of 0.25MPa.G, with flow rate changes caused by pressure fluctuations handled by the return system set by the buyer), operates within an inlet pressure range of 0.20~0.30MPa.G (gauge pressure) at normal temperature, and delivers an exhaust pressure of 0.7MPa.G (gauge pressure). Driven by a 75kW main motor, it features a compact overall design with dimensions of 3000×2200×2100mm and a total weight of approximately 4000kg, allowing for convenient integration into on-site refined reduction systems. Its robust structural design ensures stable operation even under intermittent working conditions with frequent start-ups and stops.
Engineered as a V-type, open water-cooled, oil-free lubrication reciprocating piston compressor, the VW-6.6/(2~3)-7 adopts a single-stage compression, two-cylinder configuration and is supplied as an integrated skid-mounted unit. Key components are selected for durability and stable performance:
Cylinders & Cylinder Heads: Both cylinders and cylinder heads are made of HT250 gray cast iron, with an oil-free lubrication design to prevent oil contamination of the natural gas medium and meet the purity requirements of industrial refined reduction processes.
Packing & Piston Components: The packing uses PTFE-filled materials, and the piston is equipped with wear-resistant piston rings and guide rings. These components effectively enhance the compressor's sealing performance and extend the service life of vulnerable parts.
Crankshaft & Connecting Rod: The crankshaft is forged from high-quality carbon steel, with crankpins subjected to induction hardening to improve wear resistance; the connecting rod is made of 40Cr forged steel, ensuring reliable power transmission during long-term operation.
Stable Operation & High Safety: The open water-cooling system efficiently controls the exhaust temperature (≤50℃), and the pressure lubrication system (for the crankshaft, connecting rod, and crosshead) ensures adequate lubrication of moving parts. An explosion-proof PLC control cabinet with a touch screen enables real-time monitoring of operating parameters, as well as automatic alarm and shutdown protection in case of faults, meeting the safety requirements of explosive environments.
Easy Installation & Maintenance: The integrated skid-mounted base provides sufficient strength and rigidity, simplifying on-site installation; the inclusion of a manual turning device and standardized spare parts (such as maintenance kits and oil filters) facilitates daily maintenance and reduces equipment downtime.
Strong Environmental Adaptability: Designed to adapt to complex industrial site conditions (including temperature fluctuations and specific seismic requirements), the compressor can operate stably under varying temperature and environmental conditions, ensuring the continuous supply of natural gas for industrial processes.
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 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 | 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 | |
| 11 | VF-2.2/（0.5～0.7）-60 | Natural gas | 180 | 6 | 45 | Air-cooled | 6000×2500×2400 | 8000 | |
| 12 | VWF-1.65/(25～35)-50 | Natural gas | 2500 | 5 | 90 | Air-cooled | 4500×2500×2100 | 5500 | |
| 13 | VWF-11/（0.5～2）-14 | Natural gas | 1000 | 1.4 | 160 | Air-cooled | 5200×2000×2200 | 6000 | |
| 14 | VWF-13.6/(0.05～0.2)-6 | Natural gas | 800 | 0.6 | 90 | Air-cooled | 5000×2200×2200 | 6000 | |
| 15 | VWF-8/（0.6～3）-12 | Natural gas | 1900 | 1.2 | 132 | Air-cooled | 5800×2300×2450 | 7800 | |
| 16 | VWF-9/0.05-14 | Natural gas | 500 | 1.4 | 90 | Air-cooled | 3800×2000×1600 | 3500 | |
| 17 | DFW-15.9/（0.4～1）-16 | Natural gas | 1330 | 1.6 | 250 | Mixed cooling | 5000×3400×2000 | 12000 | |
| 18 | VWFD-7.5/(0.5～1)-3 | Natural gas | 20000 | 0.3 | 45 | Mixed cooling | 4000×2300×2300 | 400 | |
| 19 | MFWD-6.0/(25～45)-45 | Natural gas | 20000～36000 | 4.5 | 250 | Mixed cooling | 6500×3000×3200 | 17000 | |
| 20 | DW-2.8/(16～25)-50 | Natural gas | 2500 | 5.0 | 160 | Water-cooled | 4300×3000×1600 | 7000 | |
| 21 | DW-3/15-52 | Natural gas | 2550 | 5.2 | 185 | Water-cooled | 3800×3400×2300 | 9000 | |
| 22 | DW-4.9/(1.5～2.5)-22 | Natural gas | 700 | 2.2 | 110 | Water-cooled | 3800×2700×1800 | 6000 | |
| 23 | DW-6.9/（7～15）-20 | Natural gas | 4000 | 2.0 | 160 | Water-cooled | 3600×2300×1600 | 4500 | |
| 24 | DW-1.92/2.5-22 | Natural gas | 320 | 2.2 | 45 | Water-cooled | 3200×3000×1700 | 3000 | |
| 25 | DW-7.6/1.5-25 | Natural gas | 1000 | 2.5 | 160 | Water-cooled | 5200×3200×2200 | 10000 | |
| 26 | DWD-8/4-10 | Natural gas | 2100 | 1.0 | 110 | Water-cooled | 5800×3300×2300 | 8800 | |
| 27 | MW-19.2/(1～17)-(17～25) | Natural gas | 2000 | 1.7～2.5 | 400 | Water-cooled | 7200×3600×2100 | 21000 | |
| 28 | VW-8.4/(2～4)-20 | Natural gas | 1500 | 2 | 185 | Water-cooled | 5500×2200×2700 | 6000 | |
| 29 | VW-9. 1/(0.05～0. 1)-5型 | Natural gas | 500 | 0.5 | 55 | Water-cooled | 3500×2200×1800 | 5000 | |
| 30 | ZW-1.6/（35～52）-(39～56) | Natural gas | 4000 | 3.9～5.6 | 37 | Water-cooled | 3200×1700×1800 | 2500 | |
It is specifically designed for natural gas (as clearly specified in the technical agreement that the medium of the compressor is natural gas). It is not suitable for compressing other gases such as hydrogen, oxygen or special industrial gases. If there is a demand for compressing other gases, it is recommended to consult the supplier for customized gas compressor solutions.
Due to its reasonable structural design and high-quality component selection (such as wear-resistant piston rings, guide rings and PTFE-filled packing), routine maintenance (including checking the condition of filters, inspecting seals, and testing the performance of safety valves) is generally required every 3,000-4,000 operating hours. In addition, the key vulnerable parts (such as piston rings, valve plates) have a service life of no less than 6,000 hours, and the oil-free lubrication design for cylinders and packing avoids frequent lubricant replacement, further reducing maintenance frequency.
Yes, the compressor complies with a series of national and industrial technical standards. For example, it meets the requirements of API 618 (Reciprocating Compressors for Petroleum, Chemical and Gas Industry Facilities), GB/T 3853 (Acceptance Tests for Positive Displacement Compressors), and GB 150 (Pressure Vessels) for pressure components such as buffer tanks. At the same time, its explosion-proof parts (such as explosion-proof motor, explosion-proof PLC control cabinet) meet the requirements of GB 3836 series standards, ensuring safe and compliant operation in explosive environments.
Transportation methods: The compressor can be transported by land (truck), and if there is a need for long-distance or cross-regional transportation, sea or railway transportation can also be selected. The specific transportation method can be determined through negotiation between the supplier and the buyer according to the actual project location and transportation conditions.
Packaging requirements: The packaging of the compressor shall comply with GB/T 13384 (General Technical Conditions for Packaging of Mechanical and Electrical Products) and relevant railway, highway transportation regulations. The whole machine (including the skid-mounted base, control cabinet and buffer tank) is packaged with moisture-proof, rain-proof and anti-vibration measures (such as using moisture-proof films, shock-absorbing pads). For key components (such as spare parts, precision instruments), they are packed in wooden boxes or metal boxes separately to avoid damage during transportation.
The supplier provides comprehensive after-sales technical support, including on-site guidance for equipment installation and commissioning, training for the buyer's operation and maintenance personnel (covering equipment operation, daily maintenance, fault diagnosis and handling), and supply of spare parts. During the quality guarantee period (12 months after the completion of equipment performance acceptance or 18 months after the arrival acceptance, whichever comes first), if the equipment is damaged due to the supplier's manufacturing quality, the supplier will provide free repair or replacement of parts, and send technical personnel to the buyer's site for handling within 48 hours after receiving the notice.
