China LPG Compressor Factory - Reliable Suppliers for Oil-Free LPG Transfer and Pressurization Solutions
Liquefied Petroleum Gas (LPG) Piston Compressor Advantages
01
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.
02
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
01
Explosion-Proof & Oil-Free Lubrication Design
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.
02
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.
03
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
Z Type
| 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 | |
V / W Type
| 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 | |
M Type
| 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 | |
D Type
| 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 | |
Model Designation Decoding:
ZVertical type
WOil-free / F: Air-cooled
0.4Actual volume flow (m³/min)
10Inlet pressure (barg)
16Outlet pressure (barg)
| 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 |
The equipment size and weight are for reference only, and the final design shall prevail.
Case Study
Frequently Asked Questions (FAQ)
What are the main advantages of LPG piston compressors?
LPG piston compressors offer a large flow range (from hundreds to tens of thousands of m³/h), high cost-effectiveness for procurement and maintenance, stable skid-mounted integration, and excellent adaptability to fluctuating pressure and flow conditions.
Why is an oil-free lubrication design used in LPG compressors?
Oil-free lubrication prevents process gas contamination. It utilizes self-lubricating piston rings and packing made of PTFE or carbon composite materials, ensuring high purity of the LPG and avoiding downstream contamination.
What explosion-proof standards do these compressors meet?
All electrical components and drive motors exposed to hazardous gas environments comply with the Ex d IIB T4 explosion-proof rating to prevent ignition and ensure plant safety.
How is gas leakage prevented along the piston rod?
A nitrogen buffer packing system is typically recommended. It introduces low-pressure nitrogen to form a positive pressure barrier, preventing LPG from leaking outward along the piston rod and routing any residual leak to a vent system.
What safety interlock protections are integrated into the compressor skid?
The integrated control panel features automatic alarms and shutdown protections for low suction pressure, high discharge pressure, high discharge temperature, low lubricating oil pressure, and cooling water failures.