Description
High Pressure Natural Gas Piston Compressor
The DWF-4.1/(18~25)-45 reciprocating piston compressor is a medium-high pressure model for natural gas boosting in industrial gas processing and transportation, capable of stable pressurization during long-term continuous operation.
It features a nominal volumetric flow of 4.1m³/min with an actual gas handling capacity of 95,000–135,000 Nm³/h. Under normal temperature conditions, it operates with an inlet pressure range of 1.8~2.5MPa(G) and delivers a rated discharge pressure of 4.5MPa(G), driven by a 200kW motor rated at 740r/min.
The fully integrated skid-mounted unit measures 6200×2900×2300mm and weighs 14 tons, enabling easy on-site pipeline connection and consistent long-term operation.
Balanced Reciprocating Structure for High Pressure Operation
The DWF-4.1/(18~25)-45 uses a D-type symmetrical balanced structure.
Different from conventional reciprocating arrangements, the balanced design helps reduce the influence of reciprocating forces during operation.
The main structural features include:
- D-type symmetrical cylinder arrangement
- Single-stage two-cylinder configuration
- Reciprocating piston compression
- Oil-free compression chamber
- Forced air cooling system
This configuration provides a compact layout while maintaining stable mechanical operation.
Oil-Free Compression for Natural Gas Handling
For natural gas applications, controlling gas quality is important.
The DWF-4.1/(18~25)-45 adopts an oil-free lubrication design, separating lubrication components from the compression chamber.
The design helps to:
- Reduce oil contamination risk
- Maintain cleaner compressed natural gas
- Protect downstream gas equipment
The PTFE-filled packing components support sealing performance during long-term operation.
Performance Advantages
- Stable Operation & High Safety: Matched forced air cooling restricts exhaust temperature below 125℃. Complete pressure lubrication safeguards all moving assemblies. Equipped with ExdIIBT4 explosion-proof motor, Siemens S7-1200 PLC and Weinview touch screen, it realizes real-time parameter monitoring and automatic fault alarm & shutdown, satisfying safety standards for natural gas hazardous working areas.
- Easy Installation & Maintenance: High-rigidity integrated skid base cuts on-site construction work. Built-in manual turning device, matched wearing spares and dedicated maintenance tools effectively shorten equipment downtime.
- Strong Environmental Adaptability:Adaptable to ambient temperature of -20℃~+45℃. Equipped with oil circuit heat preservation, electric tracing and low-temperature oil heater to sustain stable natural gas supply under severe temperature fluctuations.
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
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
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FAQ
1. What type of natural gas applications is the DWF-4.1/(18~25)-45 suitable for?
The DWF-4.1/(18~25)-45 is designed for natural gas pressure boosting applications, including pipeline systems, oil and gas field gas utilization, and industrial energy projects requiring increased gas pressure.
2. Why does the DWF-4.1/(18~25)-45 use a D-type symmetrical balanced structure?
The D-type balanced structure helps reduce vibration caused by reciprocating movement and improves mechanical stability during continuous high-pressure natural gas compression.
3. What are the benefits of the oil-free compression design?
The oil-free design reduces the possibility of lubricating oil entering the compression chamber, helping maintain cleaner natural gas and making the compressor suitable for gas systems with higher cleanliness requirements.
4. What are the main operating parameters of this natural gas compressor?
The DWF-4.1/(18~25)-45 provides a flow rate of 4.1m³/min, operates with an inlet pressure of 1.8~2.5MPa.G, and delivers compressed natural gas at 4.5MPa.G discharge pressure.
