Reciprocating Micro-oil/ oil-free Piston Compressor
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Our company specialize in making various kinds of compressors, such as:Diaphragm compressor,Piston compressor, Air compressors,Nitrogen generator,Oxygen generator ,Gas cylinder,etc. All products can be customized according to your parameters and other requirements.
This series of oil-free compressor is one of the first products produced by our factory in China. The product has the characteristics of low speed, high component strength, stable operation, long service life and convenient maintenance. This series compressor is in the form of unit. It integrates compressor, gas-liquid separator, filter, two position four-way valve, safety valve, check valve, explosion-proof motor and chassis. The utility model has the advantages of small volume, light weight, low noise, good sealing performance, easy installation, simple operation, etc.
Main components
1. Motion system: crankshaft, piston connecting rod assembly, coupling, etc.
2. Air distribution system: valve plate, valve spring, etc.
3. Sealing system: piston ring, oil seal, gasket, packing, etc.
4. Body system: crankcase, cylinder block, cylinder liner, cover plate, etc.
5. Lubrication system: lubricating oil pump, oil filter, pressure regulating valve, etc.;
6. Safety and energy regulation systems: safety valves, energy regulation devices, etc.
Working principle of piston compressor
When the crankshaft of the piston compressor rotates, the piston will reciprocate through the transmission of the connecting rod, and the working volume formed by the inner wall of the cylinder, the cylinder head and the top surface of the piston will periodically change. When the piston of a piston compressor starts to move from the cylinder head, the working volume in the cylinder gradually increases. At this time, the gas flows along the intake pipe and pushes the intake valve to enter the cylinder until the working volume reaches the maximum. , The intake valve is closed; when the piston of the piston compressor moves in the reverse direction, the working volume in the cylinder is reduced, and the gas pressure is increased. When the pressure in the cylinder reaches and is slightly higher than the exhaust pressure, the exhaust valve opens and the gas is discharged from the cylinder , Until the piston moves to the limit position, the exhaust valve is closed. When the piston of the piston compressor moves in the reverse direction again, the above process repeats. In short, the crankshaft of a piston compressor rotates once, the piston reciprocates once, and the process of air intake, compression, and exhaust is realized in the cylinder, which completes a work cycle.
Advantages of piston compressor
1. The applicable pressure range of the piston compressor is wide, and the required pressure can be reached regardless of the flow rate;
2. The piston compressor has high thermal efficiency and low unit power consumption;
3. Strong adaptability, that is, a wide exhaust range, and is not affected by the pressure level, and can adapt to a wider pressure range and cooling capacity requirements;
4. Piston compressors have low requirements for materials, and use common steel materials, which is easier to process and lower in cost;
5. The piston compressor is relatively mature in technology, and has accumulated rich experience in production and use;
6. The device system of the piston compressor is relatively simple.
Note: In the unloading process, the compressor pressurizes the gas from the storage tank and then presses it into the tank car through the gas-phase pipeline, and presses the liquid from the tank car to the storage tank through the gas-phase differential pressure to complete the unloading process. When the gas phase is pressurized, the temperature of the gas phase will rise. At this time, forced cooling is not necessary, because if the gas phase is compressed and then cooled, it is easy to liquefy, and it is difficult to establish the pressure difference of the gas phase, which is not conducive to the replacement of the gas phase and the liquid phase. In short, it will cause the prolongation of the unloading process. If it is necessary to recover the residual gas, the cooler can be selected to forcibly cool the gas phase during the recovery operation, so as to recover the residual gas as soon as possible.The loading process is opposite to the unloading process.
Company Profile
About Us
Xuzhou Huayan Gas Equipment Co., Ltd. is a premier global provider of gas compression solutions. With accumulated expertise in design and manufacturing spanning decades, our company possesses comprehensive production capabilities encompassing professional forging, casting, heat treatment, welding, precision machining, assembly testing, and quality verification processes. Supported by a dedicated technical team of 120 professionals and a sprawling 90,000 m² manufacturing facility, we maintain advanced technical testing equipment and rigorous quality control methods to ensure superior product performance.
Capable of custom-designing, manufacturing, and installing equipment according to specific customer parameters, we currently achieve an annual production capacity of 500 gas compressor units. Our technical excellence enables the development of compressors with discharge pressures up to 100MPa, meeting the most demanding industrial requirements.
With a global footprint extending to over 50 countries across five continents, including key markets such as Indonesia, Egypt, Vietnam, South Korea, Thailand, Finland, Australia, Czech Republic, Ukraine, and Russia, we deliver complete turnkey solutions for clients worldwide. Our commitment to operational excellence ensures every customer receives high-performance equipment paired with professional technical support and responsive service.
Product Description
Piston compressors deliver robust, high-pressure performance for low-to-medium flow applications. Built with hardened components (crankcase, cylinders, piston rods) and modular designs, they ensure durability, easy maintenance, and adaptability to variable loads. Key advantages include multi-stage pressure capabilities, oil-free options for contamination-sensitive processes, and compatibility with diverse gases such as nitrogen, CO2, natural gas, hydrogen, and biogas.
Ideal for oil & gas, chemical processing, renewable energy, and industrial systems, these compressors excel in environments requiring reliable gas compression, intermittent operation, or extreme pressure stability. Their mechanical simplicity and scalability suit both fixed and mobile setups.
Key Components of a Compressor
1.Compressor Main Unit
The main unit types of compressors include: diaphragm type, piston type, screw type, and liquid-driven type. The main unit comprises the following components: crankcase, crankshaft, connecting rod, piston, cylinder block, cylinder head, and sealing elements.
2.Piping and Cooling System
Common cooling methods for compressors include water cooling or air cooling. Some piston compressors utilize a hybrid approach with gas air-cooling and partial water cooling for the cylinder head. Cooling systems can be custom-designed and manufactured according to customer requirements.
3.Power Drive
Compressors are predominantly driven by electric motors (over 90% of applications). In scenarios without electrical power, diesel engines or natural gas engines may be employed. Our company offers custom-engineered engine-driven solutions based on customer specifications and machine models.
4.Electrical Control System
The electrical control system is divided into high-voltage and low-voltage sections:
High-voltage section: Refers to power supply systems with voltages of 220V/380V or higher, primarily used for driving high-power equipment such as motors.
Low-voltage section: Includes controllers, instrumentation, and other low-voltage devices, typically operating at safe voltages of 24V or 36V.
5.Oil Pressure System
The lubrication system is critical for stable compressor operation. It not only lubricates moving components and reduces operating temperatures but also ensures discharge pressure stability in diaphragm compressors, where oil pressure directly governs consistent performance.
Chemical Process Compressor Description
Chemical process compressors refer to process reciprocating piston compressors used to compress various single or mixed media gases in petroleum and chemical processes, as well as chemical exhaust gas recycling systems. Its main function is to transport the medium gas in the reaction device and provide the required pressure to the reaction device. Features 1. Designed for specific process flow. 2. The whole machine is skid-mounted and advanced in structure. 3. The compressor types are: Z type, D type, M type. 4. The middle body of the slideway and the cylinder can be designed in different structural forms according to the process requirements.
Main components
1.Cylinder Assembly: Cylinder block, piston (with rings), and cylinder head (housing intake/discharge valves).
2.Crankshaft Mechanism: Crankshaft, connecting rod, and crosshead (in long-stroke models) to convert rotary motion into reciprocation.
3.Valve System: Intake and discharge valves regulating gas flow.
4.Sealing Components: Piston rings and packing glands to prevent gas leakage.
5.Lubrication System: Oil pump, filter, and cooling systems (water jackets or fins) to manage heat and friction.
6.Drive & Safety: Coupling/pulley for power transmission, relief valves, and pressure/temperature gauges.
7.Features: Modular design for easy maintenance, multi-gas compatibility (N2, CO2, natural gas, H2, biogas), high-pressure capability via multi-stage compression, and rugged construction for durability.
Advantages of piston compressor
1.Wide pressure range, applicable from low pressure to high pressure.
2.Strong adaptability, exhaust can vary over a large range.
3.High thermal efficiency, lower energy consumption and energy saving.
4.Compared with diaphragm compressors, they are smaller, lighter, and cheaper to transport across borders.
5.Large gas volume, high speed and low purchase cost.
6.It can ensure that the gas purity reaches 99.9%.
7.Mature technology and high control ability
8.Low maintenance cost, average lifespan of vulnerable parts ≥ 6000 hours
This series of natural gas compressors is mainly used for pressurized transportation of pipeline natural gas, CNG refueling stations, wellhead gas collection and pressurization, oil and gas processing plants, and other occasions.
1. Reliable operation and easy maintenance.
2. Flexible load adjustment, wide intake range, and wide adaptability.
3. The overall modular structure has low noise and is easy to install in urban areas, saving investment.
4. Siemens PLC control system, with high degree of automation and convenient remote control.
Historical Performance Parameter Sheet
| S/N |
Model |
motor power(kW) |
inletpressure(Mpa) |
outlet pressure(MPa) |
Flow (Nm³/h) |
| 1 |
ZW-0.6/2-25 |
30 |
0.2 |
2.5 |
90 |
| 2 |
ZW-1.5/1-12 |
22 |
0.1 |
1.2 |
180 |
| 3 |
ZW-1.4/2-40 |
37 |
0.2 |
4 |
250 |
| 4 |
ZW-1.3/4-25 |
37 |
0.4 |
2.5 |
340 |
| 5 |
VW-7.2/2.5-6 |
45 |
0.25 |
0.6 |
1200 |
| 6 |
VW-7.2/1-22 |
132 |
0.1 |
2.2 |
800 |
| 7 |
DW-1.2/2-150 |
45 |
0.2 |
15 |
400 |
| 8 |
DW-0.5/20-160 |
75 |
2 |
16 |
600 |
| 9 |
DW-3.8/10-45 |
185 |
1 |
4.5 |
2300 |
| 10 |
DW-11/4-20 |
250 |
0.4 |
2 |
3000 |
| 11 |
ZW-3/2-3 |
11 |
0.2 |
0.3 |
480 |
| 12 |
ZW-5.5/2-6 |
45 |
0.2 |
0.6 |
900 |
| 13 |
ZW-2/20 |
22 |
atm |
2 |
110 |
| 14 |
VW-3/20 |
37 |
atm |
2 |
165 |
| 15 |
VW-4/20 |
45 |
atm |
2 |
220 |
| 16 |
VW-5/20 |
55 |
atm |
2 |
285 |
| 17 |
VW-6/20 |
75 |
atm |
2 |
330 |
| 18 |
VW-6.8/30 |
75 |
atm |
3 |
370 |
| 19 |
DW-32/0.05-3 |
132 |
0.05 |
0.3 |
1800 |
| 20 |
DW-30/2-8 |
280 |
0.2 |
0.8 |
4900 |
|
Customization is supported. Please contact us for more models and technical details.
Related Products
Authentication Certificate
We hold internationally recognized certifications including CE and ISO standards (accredited by IAF), as well as ECM compliance recognition. These certifications demonstrate our unwavering commitment to quality, safety, and environmental responsibility:
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CE Marking ensures compliance with EU safety, health, and environmental regulations, guaranteeing free market access across Europe.
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ISO Certification (backed by IAF accreditation) validates our adherence to globally benchmarked quality management systems, enhancing operational consistency and customer confidence.
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ECM Recognition underscores our alignment with industry-specific technical and performance standards.
Should your market or project require additional certifications (e.g., API, ASME, or region-specific approvals), our experienced technical and compliance team will collaborate with you to efficiently obtain the necessary certifications. We tailor our processes to meet your regulatory requirements, ensuring seamless market entry for our equipment. For certification support or clarification, please contact us to discuss customized solutions.
Factory Strength
Our 90,000+Square meter modern production facility, staffed by 120+ professionals, delivers customized engineering solutions with precision manufacturing capabilities. Equipped with 20 advanced CNC machining centers, we handle workpieces up to 1200mm in diameter with micron-level accuracy (0.01mm). Rigorous quality control protocols include full inspections of critical components using CMM (Coordinate Measuring Machines) and multi-phase load testing by certified engineers post-assembly. Every unit undergoes performance validation to comply with ASME/API standards and client specifications, backed by ISO 9001-certified quality management for traceable, reliable delivery.
Cooperative Brand
Our Customers
Exhibition
Cooperation Process
After order
We utilize fumigation-free solid wood frameworks certified by ISO international export quarantine standards. Internally reinforced with channel steel for three-dimensional support, the exterior is wrapped with 0.8mm thickened metal corner guards and secured at joints using waterproof galvanized steel straps. This design ensures impact resistance, compression-proof durability, moisture protection, and rust prevention throughout transit, guaranteeing your goods arrive safely.
Delivery capability
Our company will develop customized delivery schedules for your project, supported by integrated logistics solutions covering air, sea, and land transport.
Leveraging China's domestic network and global partnerships, we ensure efficient cross-border operations with real-time tracking, customs clearance support, and bonded warehousing capabilities. Multi-modal flexibility guarantees cost-effective and timely delivery for all cargo types.
1.How to get a prompt quotation of gas compressor ?
1)Flow Rate/Capacity : ___ Nm3/h
2)Suction/ Inlet Pressure : ____ Bar
3)Discharge/Outlet Pressure :____ Bar
4)Gas Medium :_____
5)Voltage and Frequency : ____ V/PH/HZ
2.How long is delivery time ?
Delivery time is around the 30-90 days .
3.What about the voltage of products? Can they be customized?
Yes, the voltage can be customized according to your inquire.
4.Can you accept OEM orders?
Yes, OEM orders is highly welcome.
5.Will you provide some spare parts of the machines?
Yes, we will .
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