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The DWF-4.1/(18~25)-45 Natural Gas Compressor, tailored for natural gas compression scenarios, is a high-reliability reciprocating piston compressor. It is developed to stably boost the pressure of natural gas within a specific range, serving as critical equipment in industrial gas processing systems. It ensures the efficient transportation and utilization of natural gas, meeting the operational demands of medium-to-high pressure gas processing processes.
Key performance indicators demonstrate its adaptability to industrial operations: it achieves a nominal volumetric flow rate of 4.1m³/min, with an actual natural gas handling capacity ranging from 95,000 to 135,000 Nm³/h. It operates within an inlet pressure range of 1.8~2.5MPa(G) at normal temperature and delivers an exhaust pressure of 4.5MPa(G). Driven by a 200kW main motor with a rated speed of 740r/min, it features a compact integrated skid-mounted design with overall dimensions of approximately 6200×2900×2300mm and a total weight of around 14 tons. This design allows for convenient on-site installation and integration into existing gas processing systems, while its robust structure ensures stable operation even under continuous working conditions.
Engineered as a D-type (symmetrically balanced), forced air-cooled, oil-free lubrication reciprocating piston compressor, the DWF-4.1/(18~25)-45 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:
Stable Operation & High Safety: The forced air-cooling system (equipped with air-cooled coolers and axial fans) efficiently controls the exhaust temperature (≤125℃), 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 Siemens S7-1200 PLC and a 7-inch Weinview touch screen) enables real-time monitoring of operating parameters (such as inlet/outlet pressure, oil pressure, and exhaust temperature). It also provides automatic alarm and shutdown protection in case of faults (e.g., motor overload, low oil pressure, and high exhaust temperature), meeting the safety requirements of explosive environments (with the main motor having an explosion-proof grade of ExdIIBT4).
Easy Installation & Maintenance: The integrated skid-mounted base provides sufficient strength and rigidity, simplifying on-site installation (requiring only foundation construction and secondary grouting); the inclusion of a manual turning device and a complete set of random vulnerable parts (such as connecting rod bearings, piston rings, and valve plates) and dedicated tools facilitates daily maintenance and reduces equipment downtime.
Strong Environmental Adaptability: Designed to adapt to complex industrial site conditions (operating within an ambient temperature range of -20℃~+45℃), the compressor is equipped with oil circuit insulation and electric tracing measures, as well as an auxiliary oil heater (activated when the oil temperature is below 5℃). These features ensure stable operation under temperature fluctuations and low-temperature environments, guaranteeing 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 7.29.doc" that the compression 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 to ensure safe and efficient operation.
The first oil change should be conducted after the compressor has been in operation for 200 hours, along with cleaning of the coarse oil filter and crankcase.
For regular maintenance, the lubricating oil needs to be replaced twice a year (swapped once in winter and once in summer, using L-DAB150 mechanical lubricating oil when the ambient temperature is above 5℃ and L-DAB100 when below 5℃).
Routine inspections (including checking the condition of oil filters, inspecting the sealing performance of packing and piston rings, and testing the performance of safety valves and pressure/temperature transmitters) are generally recommended every 3,000-4,000 operating hours.
In addition, key vulnerable parts (such as piston rings, guide rings, packing, and 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 for these parts, further reducing overall maintenance frequency.
Compressor main body: Meets the requirements of API 618-2007 (Reciprocating Compressors for Petroleum, Chemical and Gas Industry Facilities), SH/T 3143-2012 (Petrochemical Reciprocating Compressor Engineering Technical Specification), and GB/T 3853-1998 (Acceptance Tests for Positive Displacement Compressors).
Pressure components: Pressure vessels such as inlet and outlet buffer separators comply with GB 150-2011 (Pressure Vessels) and TSGR0004-2009 (Safety Technical Supervision Regulations for Stationary Pressure Vessels), with non-destructive testing performed in accordance with JB/T 4730.1~6-2005 (Non-Destructive Testing of Pressure Equipment).
Explosion-proof parts: Explosion-proof motor (ExdIIBT4), explosion-proof PLC control cabinet, and explosion-proof junction box meet the requirements of GB 3836 series standards (GB 3836.1-2010 to GB 3836.4-2010, GB 3836.20-2010).
Pipes and flanges: Process gas pipelines and connecting flanges comply with HG/T 20592-2009 (Steel Pipe Flanges (PN Series)).
These compliance guarantees ensure the compressor's safe, stable, and standardized operation in industrial environments.
Transportation methods: The compressor is an integrated skid-mounted unit (with overall dimensions of approximately 6200×2900×2300mm and a total weight of around 14 tons). It is mainly transported by land (using heavy-duty trucks with appropriate load-bearing capacity). For long-distance or cross-regional transportation, sea or railway transportation can be selected after confirming the loading, unloading, and fixing conditions with the transportation party. The specific transportation method shall be determined through negotiation between the supplier and the buyer based on the actual project location, transportation routes, and on-site unloading conditions.
Packaging requirements:
The whole skid-mounted unit (including compressor host, motor, control cabinet, buffer separators, and pipelines) shall be wrapped with moisture-proof films and covered with rain-proof tarpaulins to prevent moisture and rain erosion during transportation.
Shock-absorbing pads shall be placed between the skid-mounted base and the transport vehicle compartment to reduce vibration damage to components such as the compressor crankshaft and connecting rods during transportation.
Precision components (such as pressure transmitters, touch screens, and random spare parts like piston rings and valve plates) shall be packed separately in wooden boxes or metal boxes with foam cushioning inside to avoid collision and damage.
Clear labels shall be attached to the packaging (indicating product name, model, weight, center of gravity, "Handle with Care", "Moisture-Proof", and "No Inversion" signs) to guide the transportation and unloading personnel to operate correctly.
Installation and commissioning support: The supplier dispatches 1-2 mechanical technicians to the buyer's site to guide equipment installation (such as foundation secondary grouting, pipeline connection, and electrical wiring) and conduct on-site commissioning. Before commissioning, the technician will confirm that the on-site conditions (such as completed pipeline installation, qualified power connection, sufficient lubricating oil, and available gas source) meet the requirements.
Personnel training: After the completion of commissioning, the supplier's technicians will conduct on-site training for the buyer's operation and maintenance personnel, covering the compressor's working principle, daily operation procedures (start-up, shutdown, and parameter monitoring), routine maintenance methods (oil change, filter replacement), and common fault diagnosis and handling (such as alarm handling for low oil pressure and high exhaust temperature).
Spare parts supply: The supplier provides a complete set of random spare parts (including connecting rod big end bearings, piston rings, guide rings, and valve plates) with the equipment. During the service life of the equipment, the supplier promises to provide long-term supply of genuine spare parts with preferential prices.
Quality guarantee and fault handling: The quality guarantee period is 12 months after the equipment is debugged and qualified on-site or 18 months after the equipment arrives at the buyer's site, whichever comes first. During the guarantee period, if the equipment is damaged or fails to operate normally due to manufacturing or design defects, the supplier will provide free repair or replacement of parts. After receiving the buyer's on-site service request, the supplier will respond within 12 hours; for locations within 500 kilometers, technicians will arrive at the site within 24 hours, and within 48 hours for locations within 1,000 kilometers. In addition, the supplier promises to provide lifelong after-sales service for the equipment (including technical consultation and maintenance guidance beyond the guarantee period).
The DWF-4.1/(18~25)-45 Natural Gas Compressor, tailored for natural gas compression scenarios, is a high-reliability reciprocating piston compressor. It is developed to stably boost the pressure of natural gas within a specific range, serving as critical equipment in industrial gas processing systems. It ensures the efficient transportation and utilization of natural gas, meeting the operational demands of medium-to-high pressure gas processing processes.
Key performance indicators demonstrate its adaptability to industrial operations: it achieves a nominal volumetric flow rate of 4.1m³/min, with an actual natural gas handling capacity ranging from 95,000 to 135,000 Nm³/h. It operates within an inlet pressure range of 1.8~2.5MPa(G) at normal temperature and delivers an exhaust pressure of 4.5MPa(G). Driven by a 200kW main motor with a rated speed of 740r/min, it features a compact integrated skid-mounted design with overall dimensions of approximately 6200×2900×2300mm and a total weight of around 14 tons. This design allows for convenient on-site installation and integration into existing gas processing systems, while its robust structure ensures stable operation even under continuous working conditions.
Engineered as a D-type (symmetrically balanced), forced air-cooled, oil-free lubrication reciprocating piston compressor, the DWF-4.1/(18~25)-45 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:
Stable Operation & High Safety: The forced air-cooling system (equipped with air-cooled coolers and axial fans) efficiently controls the exhaust temperature (≤125℃), 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 Siemens S7-1200 PLC and a 7-inch Weinview touch screen) enables real-time monitoring of operating parameters (such as inlet/outlet pressure, oil pressure, and exhaust temperature). It also provides automatic alarm and shutdown protection in case of faults (e.g., motor overload, low oil pressure, and high exhaust temperature), meeting the safety requirements of explosive environments (with the main motor having an explosion-proof grade of ExdIIBT4).
Easy Installation & Maintenance: The integrated skid-mounted base provides sufficient strength and rigidity, simplifying on-site installation (requiring only foundation construction and secondary grouting); the inclusion of a manual turning device and a complete set of random vulnerable parts (such as connecting rod bearings, piston rings, and valve plates) and dedicated tools facilitates daily maintenance and reduces equipment downtime.
Strong Environmental Adaptability: Designed to adapt to complex industrial site conditions (operating within an ambient temperature range of -20℃~+45℃), the compressor is equipped with oil circuit insulation and electric tracing measures, as well as an auxiliary oil heater (activated when the oil temperature is below 5℃). These features ensure stable operation under temperature fluctuations and low-temperature environments, guaranteeing 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 7.29.doc" that the compression 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 to ensure safe and efficient operation.
The first oil change should be conducted after the compressor has been in operation for 200 hours, along with cleaning of the coarse oil filter and crankcase.
For regular maintenance, the lubricating oil needs to be replaced twice a year (swapped once in winter and once in summer, using L-DAB150 mechanical lubricating oil when the ambient temperature is above 5℃ and L-DAB100 when below 5℃).
Routine inspections (including checking the condition of oil filters, inspecting the sealing performance of packing and piston rings, and testing the performance of safety valves and pressure/temperature transmitters) are generally recommended every 3,000-4,000 operating hours.
In addition, key vulnerable parts (such as piston rings, guide rings, packing, and 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 for these parts, further reducing overall maintenance frequency.
Compressor main body: Meets the requirements of API 618-2007 (Reciprocating Compressors for Petroleum, Chemical and Gas Industry Facilities), SH/T 3143-2012 (Petrochemical Reciprocating Compressor Engineering Technical Specification), and GB/T 3853-1998 (Acceptance Tests for Positive Displacement Compressors).
Pressure components: Pressure vessels such as inlet and outlet buffer separators comply with GB 150-2011 (Pressure Vessels) and TSGR0004-2009 (Safety Technical Supervision Regulations for Stationary Pressure Vessels), with non-destructive testing performed in accordance with JB/T 4730.1~6-2005 (Non-Destructive Testing of Pressure Equipment).
Explosion-proof parts: Explosion-proof motor (ExdIIBT4), explosion-proof PLC control cabinet, and explosion-proof junction box meet the requirements of GB 3836 series standards (GB 3836.1-2010 to GB 3836.4-2010, GB 3836.20-2010).
Pipes and flanges: Process gas pipelines and connecting flanges comply with HG/T 20592-2009 (Steel Pipe Flanges (PN Series)).
These compliance guarantees ensure the compressor's safe, stable, and standardized operation in industrial environments.
Transportation methods: The compressor is an integrated skid-mounted unit (with overall dimensions of approximately 6200×2900×2300mm and a total weight of around 14 tons). It is mainly transported by land (using heavy-duty trucks with appropriate load-bearing capacity). For long-distance or cross-regional transportation, sea or railway transportation can be selected after confirming the loading, unloading, and fixing conditions with the transportation party. The specific transportation method shall be determined through negotiation between the supplier and the buyer based on the actual project location, transportation routes, and on-site unloading conditions.
Packaging requirements:
The whole skid-mounted unit (including compressor host, motor, control cabinet, buffer separators, and pipelines) shall be wrapped with moisture-proof films and covered with rain-proof tarpaulins to prevent moisture and rain erosion during transportation.
Shock-absorbing pads shall be placed between the skid-mounted base and the transport vehicle compartment to reduce vibration damage to components such as the compressor crankshaft and connecting rods during transportation.
Precision components (such as pressure transmitters, touch screens, and random spare parts like piston rings and valve plates) shall be packed separately in wooden boxes or metal boxes with foam cushioning inside to avoid collision and damage.
Clear labels shall be attached to the packaging (indicating product name, model, weight, center of gravity, "Handle with Care", "Moisture-Proof", and "No Inversion" signs) to guide the transportation and unloading personnel to operate correctly.
Installation and commissioning support: The supplier dispatches 1-2 mechanical technicians to the buyer's site to guide equipment installation (such as foundation secondary grouting, pipeline connection, and electrical wiring) and conduct on-site commissioning. Before commissioning, the technician will confirm that the on-site conditions (such as completed pipeline installation, qualified power connection, sufficient lubricating oil, and available gas source) meet the requirements.
Personnel training: After the completion of commissioning, the supplier's technicians will conduct on-site training for the buyer's operation and maintenance personnel, covering the compressor's working principle, daily operation procedures (start-up, shutdown, and parameter monitoring), routine maintenance methods (oil change, filter replacement), and common fault diagnosis and handling (such as alarm handling for low oil pressure and high exhaust temperature).
Spare parts supply: The supplier provides a complete set of random spare parts (including connecting rod big end bearings, piston rings, guide rings, and valve plates) with the equipment. During the service life of the equipment, the supplier promises to provide long-term supply of genuine spare parts with preferential prices.
Quality guarantee and fault handling: The quality guarantee period is 12 months after the equipment is debugged and qualified on-site or 18 months after the equipment arrives at the buyer's site, whichever comes first. During the guarantee period, if the equipment is damaged or fails to operate normally due to manufacturing or design defects, the supplier will provide free repair or replacement of parts. After receiving the buyer's on-site service request, the supplier will respond within 12 hours; for locations within 500 kilometers, technicians will arrive at the site within 24 hours, and within 48 hours for locations within 1,000 kilometers. In addition, the supplier promises to provide lifelong after-sales service for the equipment (including technical consultation and maintenance guidance beyond the guarantee period).
