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As a flagship solution from Bengbu United Compressor, the DWF-4.1/(18-25)-45 Natural Gas Compressor is engineered for efficient natural gas compression, transportation, and storage. It is designed to meet the rigorous demands of the energy sector, with a focus on reliability, efficiency, and adaptability to diverse natural gas compositions—making it ideal for pipeline networks, CNG stations, and oilfield operations.
Key technical parameters of the DWF-4.1/(18-25)-45 set it apart: a processing flow rate of 500 Nm³/h, inlet pressure range of 1.8-2.5 MPa.G, inlet temperature of ≤ 40 ℃, and exhaust pressure of 4.5 MPa.G. It is powered by a 110 kW main motor, delivering consistent power while optimizing energy consumption. The compressor’s dimensions—~5500 × 2200 × 2000 mm—and weight of ~7T balance portability (via skid-mounted design) with stability for long-term operations. It adopts a D-type (symmetrical balance) structure, water-cooled system, and oil-free lubrication, paired with 2-row, 3-stage compression to ensure efficient gas handling and minimal contamination. The unit is specifically designed for natural gas with CH₄ > 95%, H₂S ≤ 20 mg/m³, total sulfur ≤ 270 mg/m³ (calculated as sulfur), CO₂ ≤ 3%, no free water, dust content ≤ 5 mg/m³, and dust particle diameter ≤ 10 µm.
The DWF-4.1/(18-25)-45 features a 2-row, 3-stage reciprocating piston compression system, which enables gradual pressure buildup and maximizes efficiency. This design reduces energy loss and ensures stable output pressure—critical for natural gas pipelines, where pressure consistency prevents flow disruptions or equipment damage. The water-cooled system efficiently dissipates heat generated during compression, maintaining optimal operating temperatures even in 24/7 continuous-operation scenarios eliminating the need for frequent shutdowns.
Key components are built to withstand natural gas’s unique properties:
• Crankcase: Crafted from high-grade gray cast iron, it stores lubricating oil and includes interfaces for oil level observation, oil injection, and temperature measurement—simplifying maintenance and ensuring smooth operation.
• Cylinder & Cylinder Head: Made from gray cast iron or forged steel, these parts resist corrosion from natural gas components (e.g., H₂S) and withstand high pressure, ensuring long-term reliability.
• Double Middle Body Structure: Prevents lubricating oil from entering the cylinder, ensuring clean natural gas output and avoiding contamination that could damage downstream equipment (e.g., pipelines, storage tanks, or CNG vehicle engines).
The entire unit—including the main compressor, motor, and auxiliary equipment—is mounted on a skid, enabling easy transportation via land, sea, or air. This design simplifies on-site installation, as the skid provides a stable base and pre-aligned components, reducing setup time and labor costs. The compressor operates at low vibration and noise levels, enhancing operator safety and comfort. Critical maintenance points (e.g., oil drain ports, filter access) are easily accessible, with a manual ball valve for crankcase oil drainage to streamline routine upkeep.
To adapt to varied project needs, the DWF-4.1/(18-25)-45 offers flexible customization:
• Structural forms: Choose from D-type (standard), M-type, S-type, W-type, V-type, or Z-type to match site layout and space constraints.
• Cooling methods: Opt for water-cooled (standard), air-cooled, or mixed cooling systems based on local water availability and climate (e.g., air-cooled for arid regions).
• Installation types: Select fixed, mobile, skid-mounted (standard), or cabin-type setups for stationary facilities (e.g., CNG stations) or mobile projects (e.g., field gas recovery).
• Drive modes: The standard motor-driven system can be replaced with a diesel engine, ideal for remote oilfields or gas sites with limited grid access.
The compressor incorporates proprietary technologies backed by Chinese utility model patents, enhancing performance and durability:
• Piston rod thread protective sleeve (Patent No.: ZL 2017 2 1907021.7)
• Piston ring support device (Patent No.: ZL 2018 2 0294776.2)
• Range piston for symmetrical balanced compressors (Patent No.: ZL 2017 2 190177.0)
• Integrated long-short double compartment (Patent No.: ZL 2018 2 0294762.0)
The DWF-4.1/(18-25)-45 Natural Gas Compressor is a versatile solution for the energy and industrial sectors, with core applications including:
• Natural Gas Pipeline Operations: Boosts gas pressure for long-distance transportation, ensures consistent flow through pipelines, and supports underground gas storage facilities (critical for balancing supply and demand during peak usage).
• CNG Stations: Compresses natural gas to the required pressure (typically 20-25 MPa) for storage and refueling natural gas vehicles (NGVs), with adjustable settings to match station-specific flow needs.
• Oil & Gas Field Operations: Assists in associated gas recovery (capturing gas released during oil extraction) and drainage gas production, reducing waste and maximizing resource utilization for oilfield operators.
• Industrial Process Support: Supplies compressed natural gas for diverse industrial tasks, such as stirring in pharmaceutical and brewing industries, pressurized gas transport in chemical sectors, bottle blow molding in food production, and part dust removal in machinery manufacturing.
 | 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 |
| |
| No. | Model | Medium | Flow rate (Nm3/h) | Exhaust pressure MPa （G) | Motor power (kW) | Cooling method | Overall dimensions (mm) | Weights (kg) |
| 1 | VF（D）-0.32/(30-200)-250 | Natural gas | 1500 | 25 | 75 | Air-cooled | 5538*2350*2438 | 9.5 |
| 2 | VF(D)-0.26/(30-200)-250 | Natural gas | 1000 | 25 | 55 | 5538*2350*2438 | 9.5 | |
| 3 | ZFD-0. 1/(30-200)-250 | Natural gas | 500 | 25 | 37 | 6500*2350*2450 | 5.5 | |
| 4 | DFD-3[0.28]/(2-4)[25-200]-250 | Natural gas | 1300 | 25 | 75 | 4050*3450*2100 | 12.5 | |
| 5 | MF-4/(7-11)-250 | Natural gas | 1900-2880 | ~ | 355 | Air-cooled or water-cooled | 6250*3200*3400 | 18 |
| 6 | DF-2/(10-15)-250 | Natural gas | 1320-1920 | ~ | 250 | 6000*3200*3400 | 16 | |
| 7 | MF-3.2/(8-16)-250 | Natural gas | 1700-3260 | ~ | 355 | 6250*3200*3400 | 18 | |
| 8 | MF-2.5/(14-25)-250 | Natural gas | 2250-3900 | ~ | 355 | 6450*3200*3400 | 20 | |
| 9 | DF-1.55/(15-25)-250 | Natural gas | 1500-2400 | ~ | 280 | 600*3200*3400 | 16 | |
| 10 | DF-1.45/(20-35)-250 | Natural gas | 1800-3100 | ~ | 280 | 6050*3200*3400 | 16 | |
| 11 | MF-2/(20-30)-250 | Natural gas | 2500-3700 | ~ | 355 | 6250*3200*3400 | 20 | |
| 12 | MF-1.8/(25-40)-250 | Natural gas | 2800-4400 | ~ | 355 | 6250*3200*3400 | 18 | |
| 13 | MF-1.35/(30-45)-250 | Natural gas | 2500-3700 | ~ | 315 | 6000*3200*3400 | 18 | |
| 14 | DF-1.3/(8-16)-250 | Natural gas | 700-1320 | ~ | 160 | 6000*3200*3400 | 18 | |
| 15 | MF-1.5/(40-60)-250 | Natural gas | 3700-5500 | ~ | 355 | 6250*3200*3400 | 16 | |
| 16 | MF-1.3/(50-85)-250 | Natural gas | 3900-6700 | ~ | 355 | 6250*3200*3400 | 18 | |
| 17 | W-5.6/0.5-250 | Natural gas | 500 | 25 | 160 | Water-cooled | 5000*2300*2200 | 12 |
| 18 | DF-4.7/(1.5-2)-250 | Natural gas | 700-840 | 25 | 185 | Air-cooled | 6000*3200*3400 | 16 |
| 19 | W-3.6/(1.5-3)-250 | Natural gas | 540-860 | 25 | 160 | Water-cooled | 6200*2200*2200 | 12 |
| 20 | DF-3.85/(2-4)-250 | Natural gas | 690-1150 | 25 | 185 | Air-cooled or water-cooled | 6000*3200*3400 | 16 |
| 21 | MF-5/(2-4)-250 | Natural gas | 900-1500 | 25 | 280 | 6250*3200*3400 | 18 | |
| 22 | MF-7.2/(3-4)-250 | Natural gas | 1700-2160 | 25 | 355 | 6800*3200*3400 | 20 | |
| 23 | DF-2.86/(2-6)-250 | Natural gas | 510~ 1200 | 25 | 185 | 6000*3200*3400 | 16 | |
| 24 | MF-4/(5-8)-250 | Natural gas | 1400-2150 | 25 | 315 | 6250*3200*3400 | 18 | |
| 25 | DF-1.95/(6-12)-250 | Natural gas | 820-1520 | 25 | 220 | 6000*3200*3400 | 16 | |
| 26 | DF-1.6/(8-16)-250 | Natural gas | 860-1630 | 25 | 220 | 6000*3200*3400 | 16 | |
| 27 | DF-0.58/(15-25)-250 | Natural gas | 550-900 | 25 | 90 | Air-cooled | 6000*3200*3400 | 16 |
It is primarily used for boosting and transporting natural gas in pipeline networks. It also serves pharmaceutical and brewing industries (stirring), chemical sectors (pressurized gas transport), food production (bottle blow molding), and machinery manufacturing (part dust removal).
Gas composition (mol%): natural gas with CH₄ > 95%, H₂S ≤ 20 mg/m³, total sulfur (calculated as sulfur) ≤ 270 mg/m³, CO₂ ≤ 3%, no free water, dust content ≤ 5 mg/m³, and dust particle diameter ≤ 10 µm.
Flow rate: 500Nm ³/h
Inlet pressure: 1.8-2.5MPa. G;
Inlet temperature: ≤ 40 °C
Exhaust pressure: 4.5MPa. G;
Main motor power: 110kW
Overall dimensions of the machine: ~5500 × 2200 × 2000 mm
Whole machine weight: ~7T
Yes. We offer tailored solutions based on flow rate, purity, pressure, usage environment, and other customer requirements—from design to production. Options include structural forms, cooling methods, and installation types.
Yes, it holds multiple Chinese patents for key components, ensuring compliance with industry standards and reliable performance.
As a flagship solution from Bengbu United Compressor, the DWF-4.1/(18-25)-45 Natural Gas Compressor is engineered for efficient natural gas compression, transportation, and storage. It is designed to meet the rigorous demands of the energy sector, with a focus on reliability, efficiency, and adaptability to diverse natural gas compositions—making it ideal for pipeline networks, CNG stations, and oilfield operations.
Key technical parameters of the DWF-4.1/(18-25)-45 set it apart: a processing flow rate of 500 Nm³/h, inlet pressure range of 1.8-2.5 MPa.G, inlet temperature of ≤ 40 ℃, and exhaust pressure of 4.5 MPa.G. It is powered by a 110 kW main motor, delivering consistent power while optimizing energy consumption. The compressor’s dimensions—~5500 × 2200 × 2000 mm—and weight of ~7T balance portability (via skid-mounted design) with stability for long-term operations. It adopts a D-type (symmetrical balance) structure, water-cooled system, and oil-free lubrication, paired with 2-row, 3-stage compression to ensure efficient gas handling and minimal contamination. The unit is specifically designed for natural gas with CH₄ > 95%, H₂S ≤ 20 mg/m³, total sulfur ≤ 270 mg/m³ (calculated as sulfur), CO₂ ≤ 3%, no free water, dust content ≤ 5 mg/m³, and dust particle diameter ≤ 10 µm.
The DWF-4.1/(18-25)-45 features a 2-row, 3-stage reciprocating piston compression system, which enables gradual pressure buildup and maximizes efficiency. This design reduces energy loss and ensures stable output pressure—critical for natural gas pipelines, where pressure consistency prevents flow disruptions or equipment damage. The water-cooled system efficiently dissipates heat generated during compression, maintaining optimal operating temperatures even in 24/7 continuous-operation scenarios eliminating the need for frequent shutdowns.
Key components are built to withstand natural gas’s unique properties:
• Crankcase: Crafted from high-grade gray cast iron, it stores lubricating oil and includes interfaces for oil level observation, oil injection, and temperature measurement—simplifying maintenance and ensuring smooth operation.
• Cylinder & Cylinder Head: Made from gray cast iron or forged steel, these parts resist corrosion from natural gas components (e.g., H₂S) and withstand high pressure, ensuring long-term reliability.
• Double Middle Body Structure: Prevents lubricating oil from entering the cylinder, ensuring clean natural gas output and avoiding contamination that could damage downstream equipment (e.g., pipelines, storage tanks, or CNG vehicle engines).
The entire unit—including the main compressor, motor, and auxiliary equipment—is mounted on a skid, enabling easy transportation via land, sea, or air. This design simplifies on-site installation, as the skid provides a stable base and pre-aligned components, reducing setup time and labor costs. The compressor operates at low vibration and noise levels, enhancing operator safety and comfort. Critical maintenance points (e.g., oil drain ports, filter access) are easily accessible, with a manual ball valve for crankcase oil drainage to streamline routine upkeep.
To adapt to varied project needs, the DWF-4.1/(18-25)-45 offers flexible customization:
• Structural forms: Choose from D-type (standard), M-type, S-type, W-type, V-type, or Z-type to match site layout and space constraints.
• Cooling methods: Opt for water-cooled (standard), air-cooled, or mixed cooling systems based on local water availability and climate (e.g., air-cooled for arid regions).
• Installation types: Select fixed, mobile, skid-mounted (standard), or cabin-type setups for stationary facilities (e.g., CNG stations) or mobile projects (e.g., field gas recovery).
• Drive modes: The standard motor-driven system can be replaced with a diesel engine, ideal for remote oilfields or gas sites with limited grid access.
The compressor incorporates proprietary technologies backed by Chinese utility model patents, enhancing performance and durability:
• Piston rod thread protective sleeve (Patent No.: ZL 2017 2 1907021.7)
• Piston ring support device (Patent No.: ZL 2018 2 0294776.2)
• Range piston for symmetrical balanced compressors (Patent No.: ZL 2017 2 190177.0)
• Integrated long-short double compartment (Patent No.: ZL 2018 2 0294762.0)
The DWF-4.1/(18-25)-45 Natural Gas Compressor is a versatile solution for the energy and industrial sectors, with core applications including:
• Natural Gas Pipeline Operations: Boosts gas pressure for long-distance transportation, ensures consistent flow through pipelines, and supports underground gas storage facilities (critical for balancing supply and demand during peak usage).
• CNG Stations: Compresses natural gas to the required pressure (typically 20-25 MPa) for storage and refueling natural gas vehicles (NGVs), with adjustable settings to match station-specific flow needs.
• Oil & Gas Field Operations: Assists in associated gas recovery (capturing gas released during oil extraction) and drainage gas production, reducing waste and maximizing resource utilization for oilfield operators.
• Industrial Process Support: Supplies compressed natural gas for diverse industrial tasks, such as stirring in pharmaceutical and brewing industries, pressurized gas transport in chemical sectors, bottle blow molding in food production, and part dust removal in machinery manufacturing.
| 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 |
| |
| No. | Model | Medium | Flow rate (Nm3/h) | Exhaust pressure MPa （G) | Motor power (kW) | Cooling method | Overall dimensions (mm) | Weights (kg) |
| 1 | VF（D）-0.32/(30-200)-250 | Natural gas | 1500 | 25 | 75 | Air-cooled | 5538*2350*2438 | 9.5 |
| 2 | VF(D)-0.26/(30-200)-250 | Natural gas | 1000 | 25 | 55 | 5538*2350*2438 | 9.5 | |
| 3 | ZFD-0. 1/(30-200)-250 | Natural gas | 500 | 25 | 37 | 6500*2350*2450 | 5.5 | |
| 4 | DFD-3[0.28]/(2-4)[25-200]-250 | Natural gas | 1300 | 25 | 75 | 4050*3450*2100 | 12.5 | |
| 5 | MF-4/(7-11)-250 | Natural gas | 1900-2880 | ~ | 355 | Air-cooled or water-cooled | 6250*3200*3400 | 18 |
| 6 | DF-2/(10-15)-250 | Natural gas | 1320-1920 | ~ | 250 | 6000*3200*3400 | 16 | |
| 7 | MF-3.2/(8-16)-250 | Natural gas | 1700-3260 | ~ | 355 | 6250*3200*3400 | 18 | |
| 8 | MF-2.5/(14-25)-250 | Natural gas | 2250-3900 | ~ | 355 | 6450*3200*3400 | 20 | |
| 9 | DF-1.55/(15-25)-250 | Natural gas | 1500-2400 | ~ | 280 | 600*3200*3400 | 16 | |
| 10 | DF-1.45/(20-35)-250 | Natural gas | 1800-3100 | ~ | 280 | 6050*3200*3400 | 16 | |
| 11 | MF-2/(20-30)-250 | Natural gas | 2500-3700 | ~ | 355 | 6250*3200*3400 | 20 | |
| 12 | MF-1.8/(25-40)-250 | Natural gas | 2800-4400 | ~ | 355 | 6250*3200*3400 | 18 | |
| 13 | MF-1.35/(30-45)-250 | Natural gas | 2500-3700 | ~ | 315 | 6000*3200*3400 | 18 | |
| 14 | DF-1.3/(8-16)-250 | Natural gas | 700-1320 | ~ | 160 | 6000*3200*3400 | 18 | |
| 15 | MF-1.5/(40-60)-250 | Natural gas | 3700-5500 | ~ | 355 | 6250*3200*3400 | 16 | |
| 16 | MF-1.3/(50-85)-250 | Natural gas | 3900-6700 | ~ | 355 | 6250*3200*3400 | 18 | |
| 17 | W-5.6/0.5-250 | Natural gas | 500 | 25 | 160 | Water-cooled | 5000*2300*2200 | 12 |
| 18 | DF-4.7/(1.5-2)-250 | Natural gas | 700-840 | 25 | 185 | Air-cooled | 6000*3200*3400 | 16 |
| 19 | W-3.6/(1.5-3)-250 | Natural gas | 540-860 | 25 | 160 | Water-cooled | 6200*2200*2200 | 12 |
| 20 | DF-3.85/(2-4)-250 | Natural gas | 690-1150 | 25 | 185 | Air-cooled or water-cooled | 6000*3200*3400 | 16 |
| 21 | MF-5/(2-4)-250 | Natural gas | 900-1500 | 25 | 280 | 6250*3200*3400 | 18 | |
| 22 | MF-7.2/(3-4)-250 | Natural gas | 1700-2160 | 25 | 355 | 6800*3200*3400 | 20 | |
| 23 | DF-2.86/(2-6)-250 | Natural gas | 510~ 1200 | 25 | 185 | 6000*3200*3400 | 16 | |
| 24 | MF-4/(5-8)-250 | Natural gas | 1400-2150 | 25 | 315 | 6250*3200*3400 | 18 | |
| 25 | DF-1.95/(6-12)-250 | Natural gas | 820-1520 | 25 | 220 | 6000*3200*3400 | 16 | |
| 26 | DF-1.6/(8-16)-250 | Natural gas | 860-1630 | 25 | 220 | 6000*3200*3400 | 16 | |
| 27 | DF-0.58/(15-25)-250 | Natural gas | 550-900 | 25 | 90 | Air-cooled | 6000*3200*3400 | 16 |
It is primarily used for boosting and transporting natural gas in pipeline networks. It also serves pharmaceutical and brewing industries (stirring), chemical sectors (pressurized gas transport), food production (bottle blow molding), and machinery manufacturing (part dust removal).
Gas composition (mol%): natural gas with CH₄ > 95%, H₂S ≤ 20 mg/m³, total sulfur (calculated as sulfur) ≤ 270 mg/m³, CO₂ ≤ 3%, no free water, dust content ≤ 5 mg/m³, and dust particle diameter ≤ 10 µm.
Flow rate: 500Nm ³/h
Inlet pressure: 1.8-2.5MPa. G;
Inlet temperature: ≤ 40 °C
Exhaust pressure: 4.5MPa. G;
Main motor power: 110kW
Overall dimensions of the machine: ~5500 × 2200 × 2000 mm
Whole machine weight: ~7T
Yes. We offer tailored solutions based on flow rate, purity, pressure, usage environment, and other customer requirements—from design to production. Options include structural forms, cooling methods, and installation types.
Yes, it holds multiple Chinese patents for key components, ensuring compliance with industry standards and reliable performance.
