China LPG Compressor Factory - Oil-Free LPG Compressors from Leading Suppliers for Safe Gas Transfer and Pressurization
Liquefied Petroleum Gas (LPG) Piston Compressor Advantages
Large Flow & Cost-Effectiveness
The piston compressor can provide a wide flow range from hundreds to tens of thousands of cubic meters per hour, meeting the needs of large-scale LPG transfer, filling, and process boosting. Its technology is mature, and its procurement and maintenance costs are more economical compared to diaphragm compressors of the same flow rate, making it a preferred choice for large-scale projects.
Mature and Reliable Skid-Mounted Integration & Variable Condition Adaptability
Piston compressors are easily integrated into a fully skid-mounted package including the main unit, inter-stage coolers, gas-liquid separators, lubrication system, and control panel, saving installation space and time. Through cylinder clearance adjustment and multi-stage compression design, they can adapt to certain fluctuations in suction pressure and gas flow, ensuring stable discharge pressure.
Key Design Points for LPG Piston Compressors
Explosion-Proof & Oil-Free Lubrication
The drive motor and all electrical components exposed to hazardous areas must comply with the Ex d IIB T4 explosion-proof rating. For applications requiring high purity or prohibiting oil contamination, the cylinder should adopt an oil-free lubrication design, utilizing self-lubricating piston rings and packing made from PTFE or carbon composite materials. If oil-lubricated, the compatibility of the lubricating oil with LPG must be ensured, and an efficient oil separation and recovery system must be equipped.
Safety Interlocks & Leakage Control
A comprehensive safety interlock system must be configured, including alarms and automatic shutdown protection for key parameters such as low suction pressure, high discharge pressure, high discharge temperature, low lubricating oil pressure, and cooling water failure. The piston rod packing is critical for preventing external leakage. For LPG media, a nitrogen buffer packing system is typically recommended, introducing low-pressure nitrogen to form a barrier that prevents LPG from leaking outward along the piston rod. Any leaked gas can be routed to a vent system.
Material Compatibility & Structural Safety
Components in contact with LPG, such as cylinders, valves, and piping, should be made of materials resistant to petroleum hydrocarbons. The compressor foundation must be stable, and exposed rotating parts must be equipped with protective guards. In locations such as filling stations, the compressor skid may require crash bollards (guardrails). The system should be pre-configured with nitrogen purge connections for displacing air before startup and purging residual LPG after shutdown.
Certificates
Model Selection
| Piston stroke80mm, 95mm | Piston force10KN～25KN |
| Power7.5KW-55KW | Number of cylinder banks1/2 |
| Crankshaft speed740 rpm, 980 rpm | Number of compression stages1/2/3/4 |
| Drive modeElectric motor, diesel engine, natural gas engine | |
| Piston stroke92mm, 95mm, 105mm, 120mm | Piston force25KN, 45KN, 65KN |
| Number of compression stages1/2/3/4 | Number of cylinder banks2/3/4 |
| Crankshaft speed740 rpm, 980 rpm | Power15KW-220KW |
| Drive modeElectric motor, diesel engine, natural gas engine | |
| Piston stroke92mm~315mm | Piston force45KN~660KN |
| Number of compression stages1/2/3/4 | Number of cylinder banks4 |
| Crankshaft speed300rpm~980rpm | Power160KW-3000KW |
| Drive modeElectric motor, diesel engine, natural gas engine | |
| Piston stroke92mm~315mm | Piston force25KN~200KN |
| Number of compression stages1/2/3/4 | Number of cylinder banks2 |
| Crankshaft speed300rpm~980rpm | Power30KW-1000KW |
| Drive modeElectric motor, diesel engine, natural gas engine | |
| S/N | Model | Flow | Inlet Pressure | Outlet Pressure | Motor Power |
|---|---|---|---|---|---|
| (Nm³/h) | (MPag) | (MPag) | (kW) | ||
| 1 | ZW-0.4/10-16 | 24 | 1 | 1.6 | 5.5 |
| 2 | ZW-0.6/10-16 | 36 | 1 | 1.6 | 7.5 |
| 3 | ZW-0.8/10-16 | 48 | 1 | 1.6 | 11 |
| 4 | ZW-1.1/10-16 | 66 | 1 | 1.6 | 15 |
| 5 | ZW-1.6/10-16 | 96 | 1 | 1.6 | 22 |
| 6 | ZW-2/10-16 | 120 | 1 | 1.6 | 30 |
| 7 | ZW-2.5/10-16 | 150 | 1 | 1.6 | 37 |
| 8 | ZW-3/10-16 | 180 | 1 | 1.6 | 45 |
| 9 | ZW-4/10-16 | 240 | 1 | 1.6 | 55 |
| 10 | ZW-0.4/16-24 | 24 | 1.6 | 2.4 | 5.5 |
| 11 | ZW-0.6/16-24 | 36 | 1.6 | 2.4 | 7.5 |
| 12 | ZW-0.8/16-24 | 48 | 1.6 | 2.4 | 11 |
| 13 | ZW-1.1/16-24 | 66 | 1.6 | 2.4 | 15 |
| 14 | ZW-1.6/16-24 | 96 | 1.6 | 2.4 | 22 |
| 15 | ZW-2/16-24 | 120 | 1.6 | 2.4 | 30 |
| 16 | ZW-2.5/16-24 | 150 | 1.6 | 2.4 | 37 |
| 17 | ZW-3/16-24 | 180 | 1.6 | 2.4 | 45 |
| 18 | ZW-4/16-24 | 240 | 1.6 | 2.4 | 55 |
Case Study
Russia
United States
Spain
Kazakhstan
Frequently Asked Questions
What are the key advantages of LPG piston compressors over diaphragm compressors?
LPG piston compressors offer a much larger flow capacity range, making them highly cost-effective and suitable for large-scale operations. Their technology is exceptionally mature, resulting in lower initial procurement and long-term maintenance costs compared to diaphragm compressors with similar flow ratings.
Why is oil-free lubrication design critical for certain LPG applications?
An oil-free design prevents lubricating oil from contaminating the LPG, ensuring high media purity. It utilizes self-lubricating piston rings and packing components made of PTFE or carbon composite materials, which eliminates the risk of hydrocarbon degradation caused by oil-to-gas contact.
How does the nitrogen buffer packing system prevent external gas leaks?
The nitrogen buffer system introduces low-pressure nitrogen into the piston rod packing area to form a continuous barrier. This positive pressure barrier prevents volatile LPG from escaping outward along the rod. Any minor leakage is safely directed to a closed vent system.
Which drive modes are compatible with these LPG compressors?
These compressors are highly adaptable and can be configured with standard electric motors, explosion-proof electric motors, diesel engines, or natural gas engines depending on site utility availability and safety classifications.
Can these compressors handle variable condition requirements?
Yes. Through cylinder clearance adjustments and multi-stage compression configurations, LPG piston compressors can adapt to fluctuations in suction pressure and gas flow, maintaining a stable discharge pressure even under varying operating conditions.