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ZF-0.12 /（30-200）-250 Natural Gas Compressor

High-Pressure Oil-Free Natural Gas Piston Compressor for CNG

Gas composition (mol%): Natural gas (desulfurized and dehydrated, finished natural gas)
Flow rate: 400/h
Inlet pressure: 3~20MPa. G;
Inlet temperature: normal temperature
Exhaust pressure: 25MPa. G;
Main motor power: 30kW
Overall dimensions of the machine: ~6500 × 2700 × 2100 mm
Whole machine weight: ~15T

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Product Description

Overview

The ZF-0.12/（30-200）-250 Natural Gas Compressor is a high-performance product tailored for CNG filling stations, developed by Bengbu United Compressor Manufacturing Co., Ltd., a professional manufacturer in China's compressor industry. Focused on reliable natural gas compression and supply for CNG applications, this compressor excels in stable operation, adaptability to varying working conditions, and compliance with industrial purity requirements.

Engineered to handle natural gas meeting the Class II requirements of GB/T17820-1990 《Natural Gas》, it delivers a rated volume flow of 0.1 m³/min and an air delivery volume of 400 Nm³/h (converted to the state of 0 MPa and 20℃ when the inlet pressure is 3.0~20.0 MPa at 20℃), making it well-suited for CNG filling station scenarios. With an inlet pressure range of 3.0~20.0 MPa.G (featuring adaptive variable working condition design, no need for throttling pressure reduction or single/double-stage switching) and an exhaust pressure of 25.0 MPa.G, it guarantees steady gas supply to meet vehicle refueling demands. Driven by a 30 kW YB-250M-8 explosion-proof motor, the unit achieves a balance between operational power and energy efficiency. Its compact overall dimensions (approximately 5500×3200×2700 mm) and weight (around 6T) enable convenient fixed installation in CNG filling station premises.

Beyond CNG filling station applications, this compressor can also be adapted to natural gas compression scenarios with similar medium requirements and pressure ranges, such as small-scale natural gas storage and transportation systems. Its oil-free lubrication design for key components and strict medium purity control make it a trustworthy option for both standard and high-purity natural gas compression needs.

Features

Advanced Structural Design

The ZF-0.12/（30-200）-250 adopts a vertical, single-row, sequential step-difference two-stage compression, reciprocating piston structure, combined with air cooling and oil-free lubrication for cylinders and piston components. This design prevents lubricating oil from entering the working medium, effectively ensuring the purity of natural gas. The two-stage compression mechanism enhances compression efficiency while maintaining stable pressure output throughout the process. The integrated unit design with shared base frames simplifies on-site installation and system integration.

The cylinder, forged from 40Cr, undergoes nitriding treatment on its mirror surface, significantly improving the wear resistance of the working surface and extending the service life of piston rings. The double-body structure of key transmission parts (such as crankshaft and connecting rod) and the pressure lubrication system for moving components further reinforce the reliability of oil-free operation, making it applicable to natural gas compression scenarios with strict purity requirements.

High Efficiency and Reliability

Equipped with high-quality components—including domestic well-known brand air valves, piston rings, and 填料 (with a service life of no less than 8000 hours)—and a YB-250M-8 explosion-proof motor, the compressor delivers high operational efficiency and strong stability. Its automated control system (integrated with on-site switch cabinets and control room control cabinets) enables automatic monitoring and protection of key parameters (inlet pressure, exhaust pressure, exhaust temperature, lubricating oil pressure), reducing manual intervention and minimizing human error to ensure consistent workflow.

The optimized structural balancing design reduces vibration intensity to 28 mm/s and controls noise to ≤85 dB(A)/1m, making it suitable for installation in both industrial areas and locations near residential zones with strict noise restrictions. Whether operating under full-load, partial-load, or variable inlet pressure conditions (3.0~20.0 MPa), the compressor maintains stable exhaust pressure and air delivery volume, ensuring uninterrupted natural gas supply for CNG filling stations.

Easy Installation and Maintenance

All main equipment (compressor host, air coolers, oil-water separators) and auxiliary equipment (electrical control cabinets, oil injection pumps) are integrated into a fixed installation structure, simplifying transportation and on-site setup. This integrated design eliminates the need for complex on-site assembly of scattered components, reducing installation time and labor costs.

Daily maintenance is streamlined by accessible key components and clear inspection interfaces. The crankcase is equipped with external oil drainage valves and temperature measurement ports for quick oil level checks and oil changes; the oil-water separators and high-efficiency oil removers have easy-to-disassemble filter elements for convenient replacement. Additionally, the provision of dedicated maintenance tools (valve disassembly tools, piston rod thread protection sleeves) and a detailed random spare parts list further minimizes downtime during routine maintenance.

Customizable Solutions

Recognizing diverse industrial needs, the ZF-0.12 /（30-200）-250 offers extensive customization. Customers can choose from various structural forms (D-type, M-type, S-type, W-type, V-type, Z-type), cooling methods (water-cooled, air-cooled, mixed cooling), and installation types (fixed, mobile, skid-mounted, cabin-type).

Drive options include motor or diesel engine, adapting to different power supply conditions. Packaging solutions (metal cabin, wooden box, soundproof cabin) and transportation modes (sea, air, land) are also tailored to meet specific logistics requirements, ensuring the product reaches its destination in optimal condition.

Application Area

Mainly used for boosting and transporting natural gas that flows into the pipeline network It can also be used for stirring in the pharmaceutical and brewing industries, pressurized transportation of gases in the chemical industry, blow molding of bottles in the food industry, and dust removal of parts in the machine manufacturing industry.

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 ZF-0.12/（30-200）-250 Natural Gas Compressor adopts Z-type vertical, air-cooled, oil-free lubricated, reciprocating piston type, single-row sequential step-difference two-stage compression, and the entire unit is supplied in an integrated manner with a shared base frame.

The compressor's core transmission components (including crankshaft, connecting rod, and crosshead) are supported by a robust housing structure. The crankcase, designed for stable power transmission, is equipped with dedicated interfaces for installing crosshead guides, bearings, and bearing seats to ensure precise alignment of moving parts. The lower part of the crankcase integrates a lubricating oil storage chamber, which provides a stable oil source for the pressure lubrication system of the crankshaft, connecting rod, and crosshead; the upper part is equipped with an oil inlet (breathing port) cover interface to maintain internal pressure balance and prevent oil leakage. In addition, the crankcase is also configured with practical spare interfaces such as an oil drain port, an oil level gauge observation port, a bearing seat oil injection port, and an oil temperature measurement port installation interface. The oil drain port is connected to the external of the unit and equipped with a manual control valve for convenient lubricating oil replacement and discharge.

The compressor adopts a reasonable structural design for key gas compression components. The cylinder, forged from 40Cr material, undergoes nitriding treatment on its mirror surface to enhance wear resistance, and adopts an oil-free lubrication design for the cylinder and piston components—eliminating the need for oil lubrication in the gas compression chamber to avoid medium contamination. The cylinder head, matched with the cylinder, is designed to accommodate air valves: the first-stage intake and exhaust valves use mesh valves (one intake and one exhaust for the first stage), and the second-stage intake and exhaust valves use combined valves. All air valves are arranged in a structure that is easy to disassemble and maintain, ensuring smooth gas intake and exhaust and extending the service life of the air valves.

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 （G)	Motor power (kW)	Cooling method	Overall dimensions (mm)	Weights (kg)
1	VF（D）-0.32/(30-200)-250	Natural gas	1500	25	75	Air-cooled	553823502438	9.5
2	VF(D)-0.26/(30-200)-250	Natural gas	1000	25	55		553823502438	9.5
3	ZFD-0. 1/(30-200)-250	Natural gas	500	25	37		650023502450	5.5
4	DFD-3[0.28]/(2-4)[25-200]-250	Natural gas	1300	25	75		405034502100	12.5
5	MF-4/(7-11)-250	Natural gas	1900-2880	~	355	Air-cooled or water-cooled	625032003400	18
6	DF-2/(10-15)-250	Natural gas	1320-1920	~	250		600032003400	16
7	MF-3.2/(8-16)-250	Natural gas	1700-3260	~	355		625032003400	18
8	MF-2.5/(14-25)-250	Natural gas	2250-3900	~	355		645032003400	20
9	DF-1.55/(15-25)-250	Natural gas	1500-2400	~	280		60032003400	16
10	DF-1.45/(20-35)-250	Natural gas	1800-3100	~	280		605032003400	16
11	MF-2/(20-30)-250	Natural gas	2500-3700	~	355		625032003400	20
12	MF-1.8/(25-40)-250	Natural gas	2800-4400	~	355		625032003400	18
13	MF-1.35/(30-45)-250	Natural gas	2500-3700	~	315		600032003400	18
14	DF-1.3/(8-16)-250	Natural gas	700-1320	~	160		600032003400	18
15	MF-1.5/(40-60)-250	Natural gas	3700-5500	~	355		625032003400	16
16	MF-1.3/(50-85)-250	Natural gas	3900-6700	~	355		625032003400	18
17	W-5.6/0.5-250	Natural gas	500	25	160	Water-cooled	500023002200	12
18	DF-4.7/(1.5-2)-250	Natural gas	700-840	25	185	Air-cooled	600032003400	16
19	W-3.6/(1.5-3)-250	Natural gas	540-860	25	160	Water-cooled	620022002200	12
20	DF-3.85/(2-4)-250	Natural gas	690-1150	25	185	Air-cooled or water-cooled	600032003400	16
21	MF-5/(2-4)-250	Natural gas	900-1500	25	280		625032003400	18
22	MF-7.2/(3-4)-250	Natural gas	1700-2160	25	355		680032003400	20
23	DF-2.86/(2-6)-250	Natural gas	510~ 1200	25	185		600032003400	16
24	MF-4/(5-8)-250	Natural gas	1400-2150	25	315		625032003400	18
25	DF-1.95/(6-12)-250	Natural gas	820-1520	25	220		600032003400	16
26	DF-1.6/(8-16)-250	Natural gas	860-1630	25	220		600032003400	16
27	DF-0.58/(15-25)-250	Natural gas	550-900	25	90	Air-cooled	600032003400	16

Project Case


Ukraine Project	Alibek oilfield in Southern Kazakhstan	Ningxia Zhongneng new materials engineering

FAQ

What mediums can the ZF-0.12 /（30-200）-250 compressor handle?

It is primarily designed for desulfurized and dehydrated natural gas. However, its oil-free lubrication and high-purity design make it suitable for other clean gases in industries like chemicals and food processing, with customization available for specific medium requirements.

What is the processing capacity of this compressor?

The standard processing capacity is 400 Nm³/h . For projects with different flow needs, customized versions can be developed to match specific throughput requirements, ranging from smaller to larger capacities.

Can the compressor be adapted to different pressure conditions?

Yes. While the standard model operates with an inlet pressure of 3~20 MPa.G and exhaust pressure of 25 MPa.G, it can be modified to handle varying pressure ranges (e.g., 2~6 MPa.G inlet) based on customer specifications, ensuring compatibility with diverse pipeline systems.