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The DF-0.45/(8-10)-250 CNG Compressor is a high-performance, skid-mounted reciprocating piston compressor designed for compressed natural gas (CNG) compression in fueling stations and industrial applications. With a rated flow rate of 0.45 m³/min, inlet pressure of 0.9 MPa.G, and discharge pressure up to 25 MPa.G, this unit ensures efficient, reliable, and stable gas compression under demanding operational conditions.
Built for seamless integration into CNG filling stations, this compact compressor system integrates the main compression unit, explosion-proof motor, gas circuit, cooling system, control system, and safety and drainage systems. Its rugged design is ideal for continuous operations, frequent start-stop cycles, and extreme environments, including cold climates, arid regions, and water-scarce sites.
The compressor is engineered with a low surface pressure design on all load-bearing components, including big-end bearing shells, small-end bushings, and crosshead sliding surfaces. This reduces thermal expansion, wear, and surface temperature rise, significantly extending service life and ensuring long-term reliability.
For high-pressure operations, the linear accuracy of the piston assembly is critical. The DF-0.45/(8-10)-250 uses metal or engineering-plastic guide rings and a planar self-aligning structure, delivering smooth, precise motion. This results in minimal leakage, enhanced durability of wear components, and lower maintenance costs over the life of the unit.
Designed for maximum safety and efficiency, this compressor achieves exceptionally low external leakage rates—typically 0.02% to 0.03% of total output, meeting strict global safety and environmental standards. High-quality PTFE-filled sealing rings and tin-bronze throttling and scraper rings ensure tight sealing and operational integrity.
An optimized low-velocity gas flow system, specifically designed for CNG compression conditions, reduces pressure loss, enhances system stability, and extends component life, ensuring consistent, high-efficiency operation.
Combining natural cooling for the cylinders with a forced air-cooling system for the main unit, this compressor is perfect for 24/7 continuous operation. It is particularly suitable for high-frequency start-stop applications and challenging environments, such as low-temperature regions, arid climates, or sites with limited water availability.
The low-oil lubrication design precisely injects micro amounts of oil to maintain critical component protection while keeping compressed gas purity high—with oil content as low as 8 ppm (0.5 lb/MMSCF), compliant with global high-purity CNG standards. This reduces contamination risks, prolongs the lifespan of wear parts, and enhances overall operational reliability.
Application Area
The DF-0.45/(8-10)-250 CNG Compressor is the core component of modern CNG filling stations and industrial gas systems. Its versatility and robust design make it ideal for:
CNG fueling stations for commercial, industrial, and municipal fleets.
Gas distribution networks requiring stable high-pressure compression.
Remote or off-grid facilities in cold, dry, or water-limited regions.
Industrial operations that demand a reliable high-pressure gas supply for manufacturing or power generation.
With its optimized cooling system, advanced sealing technology, and high reliability, the DF-0.45/(8-10)-250 offers outstanding performance, longevity, and cost-efficiency, making it a trusted solution for CNG compression across diverse industries.
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
 | |
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 |
Technical Parameter
| No. | Model | Medium | Flow rate (Nm3/h) | Exhaust pressure (MPa.G) | Motor power (kW) | Cooling method | Overall dimensions (mm) | Weights (kg) | |
| 1 | DW-1.6/(8～12)-120 | Hydrogen | 800 | 12 | 160 | Water-cooled | 5800×3000×2300 | 8500 | |
| 2 | DW-1.8/15-30 | Hydrogen | 1500 | 3.0 | 75 | Water-cooled | 3200×3000×1850 | 5800 | |
| 3 | DW-6.74(3.3)/0.7(5～12)-12 | Hydrogen | 600 | 1.2 | 90 | Water-cooled | 5000×3200×2100 | 8000 | |
| 4 | DW-17.9/(4～5)-6.5 | Hydrogen | 1270 | 0.65 | 132 | Water-cooled | 3500×3000×2300 | 8000 | |
| 5 | DW-1.8/15-30 | Hydrogen | 1500 | 3.0 | 75 | Water-cooled | 3200×3000×1850 | 5800 | |
| 6 | DW-9.55/0.03-16 | Hydrogen | 515 | 1.6 | 90 | Water-cooled | 3500×3200×2500 | 6500 | |
| 7 | DW-96.5/（ 15～23 ）-（ 21~ 29 ） | Hydrogen | 4500 | 2. 1～2.9 | 185 | Water-cooled | 5000×3000×2500 | 12000 | |
| 8 | DW-48/（ 15～23 ）-（ 21~29 ） | Hydrogen | 2642～4500 | 2. 1～2.9 | 55 | Water-cooled | 4000×2700×2300 | 6000 | |
| 9 | D-0.57/16-200 | Hydrogen | 500 | 20 | 75 | Water-cooled | 5800×3200×2350 | 9000 | |
| 10 | ZW-0. 18/15-22 | Hydrogen | 150 | 2.2 | 11 | Water-cooled | 2200×1600×1700 | 2000 | |
| 11 | ZW-0.82/(6～8)-20 | Hydrogen | 300 | 2.0 | 22 | Water-cooled | 2500×1500×1750 | 2000 | |
| 12 | W-3/0.1-150 | Hydrogen | 212 | 15 | 55 | Water-cooled | 6000×2700×2100 | 15000 | |
| 13 | MW-7.7/9.8-40 | Hydrogen | 4200 | 4.0 | 355 | Water-cooled | 7500×3600×2000 | 22000 | |
| 14 | MW-25.2/（1.5～1.7）-10 | Hydrogen | 3300 | 1.0 | 315 | Water-cooled | 8000×3000×2200 | 20000 | |
| 15 | PW-0.6/(10～15)-30 | Hydrogen | 0~560 | 3.0 | 30 | Mixed cooling | 2200×1800×1600 | 1800 | |
| 16 | PW-13.7/17-25 | Hydrogen | 820 | 2.5 | 30 | Mixed cooling | 4000×2700×2300 | 6000 | |
| 17 | D-0.26/（28～31）-150 | Hydrogen | 400 | 15 | 45 | Mixed cooling | 3800×3200×1950 | 4800 | |
| 18 | PW-13.7/17-25 | Hydrogen | 820 | 2.5 | 30 | Mixed cooling | 4000×2700×2300 | 6000 | |
| 19 | VW-14.3/7 | Hydrogen | 750 | 0.7 | 110 | Mixed cooling | 4800×2250×2100 | 8000 | |
| 20 | DW-7.6/（4～5.7）-6.5 | Hydrogen | 2000 | 0.65 | 55 | Mixed cooling | 3500×3000×2300 | 6000 | |
Project Case
 |  |  |
| Alibek oilfield in Southern Kazakhstan | Zaozhuang CNG compressor project of Chengdu Shenliang Technology Co., Ltd. | Beijing Hongke Qingneng Technology Co., Ltd. associated gas compressor for Shanxi Yan'an 60000 m3 project |
Q1: What applications is the DF-0.45/（8-10）-250 CNG Compressor suitable for?
The DF-0.45/（8-10）-250 CNG Compressor is specifically designed for compressed natural gas (CNG) applications. It is ideal for CNG fueling stations serving commercial, industrial, and municipal fleets, gas distribution networks requiring stable high-pressure compression, and industrial processes needing reliable CNG supply for power generation or manufacturing. Its low-oil lubrication design (oil-free in cylinders and packing) ensures high-purity natural gas output, making it suitable for environments with stringent gas quality requirements.
Q2: Can the Compressor be customized for specific operational needs?
Yes. The compressor can be tailored to customer requirements, including adjustments to treatment capacity, inlet and outlet pressure ranges, and ambient temperature adaptability. Customizations may also include cooling system optimizations for extreme climates, enhanced explosion-proof ratings for hazardous locations, and integration of auxiliary equipment such as high-efficiency filters, precision control panels, or pressure-stabilizing devices to meet unique operational conditions.
Q3: How often does the Compressor require maintenance?
Thanks to its robust construction and optimized low-oil lubrication system, the compressor offers extended maintenance intervals and reduced downtime. Routine inspections—such as monitoring lubricating oil pressure, cooling airflow, and instrument readings—are recommended monthly. Critical wear components, including piston rings, guide rings, and packing, typically require replacement every 8,000 operating hours, while major overhauls involving the crankshaft, connecting rods, and cylinders are generally needed after approximately 30,000 hours, depending on actual operating conditions.
The DF-0.45/(8-10)-250 CNG Compressor is a high-performance, skid-mounted reciprocating piston compressor designed for compressed natural gas (CNG) compression in fueling stations and industrial applications. With a rated flow rate of 0.45 m³/min, inlet pressure of 0.9 MPa.G, and discharge pressure up to 25 MPa.G, this unit ensures efficient, reliable, and stable gas compression under demanding operational conditions.
Built for seamless integration into CNG filling stations, this compact compressor system integrates the main compression unit, explosion-proof motor, gas circuit, cooling system, control system, and safety and drainage systems. Its rugged design is ideal for continuous operations, frequent start-stop cycles, and extreme environments, including cold climates, arid regions, and water-scarce sites.
The compressor is engineered with a low surface pressure design on all load-bearing components, including big-end bearing shells, small-end bushings, and crosshead sliding surfaces. This reduces thermal expansion, wear, and surface temperature rise, significantly extending service life and ensuring long-term reliability.
For high-pressure operations, the linear accuracy of the piston assembly is critical. The DF-0.45/(8-10)-250 uses metal or engineering-plastic guide rings and a planar self-aligning structure, delivering smooth, precise motion. This results in minimal leakage, enhanced durability of wear components, and lower maintenance costs over the life of the unit.
Designed for maximum safety and efficiency, this compressor achieves exceptionally low external leakage rates—typically 0.02% to 0.03% of total output, meeting strict global safety and environmental standards. High-quality PTFE-filled sealing rings and tin-bronze throttling and scraper rings ensure tight sealing and operational integrity.
An optimized low-velocity gas flow system, specifically designed for CNG compression conditions, reduces pressure loss, enhances system stability, and extends component life, ensuring consistent, high-efficiency operation.
Combining natural cooling for the cylinders with a forced air-cooling system for the main unit, this compressor is perfect for 24/7 continuous operation. It is particularly suitable for high-frequency start-stop applications and challenging environments, such as low-temperature regions, arid climates, or sites with limited water availability.
The low-oil lubrication design precisely injects micro amounts of oil to maintain critical component protection while keeping compressed gas purity high—with oil content as low as 8 ppm (0.5 lb/MMSCF), compliant with global high-purity CNG standards. This reduces contamination risks, prolongs the lifespan of wear parts, and enhances overall operational reliability.
Application Area
The DF-0.45/(8-10)-250 CNG Compressor is the core component of modern CNG filling stations and industrial gas systems. Its versatility and robust design make it ideal for:
CNG fueling stations for commercial, industrial, and municipal fleets.
Gas distribution networks requiring stable high-pressure compression.
Remote or off-grid facilities in cold, dry, or water-limited regions.
Industrial operations that demand a reliable high-pressure gas supply for manufacturing or power generation.
With its optimized cooling system, advanced sealing technology, and high reliability, the DF-0.45/(8-10)-250 offers outstanding performance, longevity, and cost-efficiency, making it a trusted solution for CNG compression across diverse industries.
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
| |
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 |
Technical Parameter
| No. | Model | Medium | Flow rate (Nm3/h) | Exhaust pressure (MPa.G) | Motor power (kW) | Cooling method | Overall dimensions (mm) | Weights (kg) | |
| 1 | DW-1.6/(8～12)-120 | Hydrogen | 800 | 12 | 160 | Water-cooled | 5800×3000×2300 | 8500 | |
| 2 | DW-1.8/15-30 | Hydrogen | 1500 | 3.0 | 75 | Water-cooled | 3200×3000×1850 | 5800 | |
| 3 | DW-6.74(3.3)/0.7(5～12)-12 | Hydrogen | 600 | 1.2 | 90 | Water-cooled | 5000×3200×2100 | 8000 | |
| 4 | DW-17.9/(4～5)-6.5 | Hydrogen | 1270 | 0.65 | 132 | Water-cooled | 3500×3000×2300 | 8000 | |
| 5 | DW-1.8/15-30 | Hydrogen | 1500 | 3.0 | 75 | Water-cooled | 3200×3000×1850 | 5800 | |
| 6 | DW-9.55/0.03-16 | Hydrogen | 515 | 1.6 | 90 | Water-cooled | 3500×3200×2500 | 6500 | |
| 7 | DW-96.5/（ 15～23 ）-（ 21~29 ） | Hydrogen | 4500 | 2. 1～2.9 | 185 | Water-cooled | 5000×3000×2500 | 12000 | |
| 8 | DW-48/（ 15～23 ）-（ 21~29 ） | Hydrogen | 2642～4500 | 2. 1～2.9 | 55 | Water-cooled | 4000×2700×2300 | 6000 | |
| 9 | D-0.57/16-200 | Hydrogen | 500 | 20 | 75 | Water-cooled | 5800×3200×2350 | 9000 | |
| 10 | ZW-0. 18/15-22 | Hydrogen | 150 | 2.2 | 11 | Water-cooled | 2200×1600×1700 | 2000 | |
| 11 | ZW-0.82/(6～8)-20 | Hydrogen | 300 | 2.0 | 22 | Water-cooled | 2500×1500×1750 | 2000 | |
| 12 | W-3/0.1-150 | Hydrogen | 212 | 15 | 55 | Water-cooled | 6000×2700×2100 | 15000 | |
| 13 | MW-7.7/9.8-40 | Hydrogen | 4200 | 4.0 | 355 | Water-cooled | 7500×3600×2000 | 22000 | |
| 14 | MW-25.2/（1.5～1.7）-10 | Hydrogen | 3300 | 1.0 | 315 | Water-cooled | 8000×3000×2200 | 20000 | |
| 15 | PW-0.6/(10～15)-30 | Hydrogen | 0~560 | 3.0 | 30 | Mixed cooling | 2200×1800×1600 | 1800 | |
| 16 | PW-13.7/17-25 | Hydrogen | 820 | 2.5 | 30 | Mixed cooling | 4000×2700×2300 | 6000 | |
| 17 | D-0.26/（28～31）-150 | Hydrogen | 400 | 15 | 45 | Mixed cooling | 3800×3200×1950 | 4800 | |
| 18 | PW-13.7/17-25 | Hydrogen | 820 | 2.5 | 30 | Mixed cooling | 4000×2700×2300 | 6000 | |
| 19 | VW-14.3/7 | Hydrogen | 750 | 0.7 | 110 | Mixed cooling | 4800×2250×2100 | 8000 | |
| 20 | DW-7.6/（4～5.7）-6.5 | Hydrogen | 2000 | 0.65 | 55 | Mixed cooling | 3500×3000×2300 | 6000 | |
Project Case
| | |
| Alibek oilfield in Southern Kazakhstan | Zaozhuang CNG compressor project of Chengdu Shenliang Technology Co., Ltd. | Beijing Hongke Qingneng Technology Co., Ltd. associated gas compressor for Shanxi Yan'an 60000 m3 project |
Q1: What applications is the DF-0.45/（8-10）-250 CNG Compressor suitable for?
The DF-0.45/（8-10）-250 CNG Compressor is specifically designed for compressed natural gas (CNG) applications. It is ideal for CNG fueling stations serving commercial, industrial, and municipal fleets, gas distribution networks requiring stable high-pressure compression, and industrial processes needing reliable CNG supply for power generation or manufacturing. Its low-oil lubrication design (oil-free in cylinders and packing) ensures high-purity natural gas output, making it suitable for environments with stringent gas quality requirements.
Q2: Can the Compressor be customized for specific operational needs?
Yes. The compressor can be tailored to customer requirements, including adjustments to treatment capacity, inlet and outlet pressure ranges, and ambient temperature adaptability. Customizations may also include cooling system optimizations for extreme climates, enhanced explosion-proof ratings for hazardous locations, and integration of auxiliary equipment such as high-efficiency filters, precision control panels, or pressure-stabilizing devices to meet unique operational conditions.
Q3: How often does the Compressor require maintenance?
Thanks to its robust construction and optimized low-oil lubrication system, the compressor offers extended maintenance intervals and reduced downtime. Routine inspections—such as monitoring lubricating oil pressure, cooling airflow, and instrument readings—are recommended monthly. Critical wear components, including piston rings, guide rings, and packing, typically require replacement every 8,000 operating hours, while major overhauls involving the crankshaft, connecting rods, and cylinders are generally needed after approximately 30,000 hours, depending on actual operating conditions.
