Qingdao Lenado Intelligent Equipment Co., Ltd. is one of the most reliable manufacturers and suppliers of cng integrated liquid-driven substation compressor in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to wholesale bulk customized cng integrated liquid-driven substation compressor from our factory.
Product Overview
Our CNG integrated liquid-driven substation compressor adopts advanced hydraulic liquid-driven compression technology. As a domestic pioneer in the hydraulic-driven compressor industry in China, we have independently developed and manufactured China's first 4500m³ natural gas liquid-driven substation compressor, the first 4800m³ natural gas liquid-driven mother station compressor, and the first batch of long-distance liquid-driven booster compressors with hourly displacement exceeding 7000m³. These large-displacement liquid-driven natural gas compressors fill the domestic market gap and are protected by independent technical patents.
We launched export business starting from 2024, providing customized integrated substation compressor solutions for global customers to adapt to diverse on-site engineering demands.
Two Main Product Types
1:Fully Integrated Type
This model integrates the gas discharge column, compressor, gas cylinder group and gas dispenser. Featuring high integration, simple on-site installation, it can be put into operation immediately after fixing on site.
Equipment length: about 9m (25 × 150L cylinder group)
Can be installed inside a 40ft high cube container
2:General Integrated Type
It integrates two or three modules among gas discharge column, compressor and gas cylinder group. It boasts flexible on-site layout, small floor space. The gas dispenser can be placed separately for more convenient refueling operation.
Core Product Parameters
| Item | Specification |
|---|---|
| Compressed Medium | Natural gas (Class II gas quality standard in GB17820) |
| Entry Pressure | 3-20MPa |
| Outlet Pressure | ≤25MPa |
| Average Displacement | 600Nm³/h / 800Nm³/h / 1000Nm³/h / 1200Nm³/h / 1600Nm³/h / 2500Nm³/h |
| Structural Layout | Single-row compression cylinder, single system / Two rows of compression cylinders, dual systems |
| Compression Stages | Two-stage compression |
| Control System | Explosion-proof control cabinet |
| Bottle Group | Max working pressure 25MPa, hydrostatic test pressure 37.5MPa; single bottle volume 150L, 25 bottles total; high-medium pressure ratio 2:3 (customizable) |
| Gas Filling Machine | 3-line double gun dispenser (single set / dual sets optional) |
| Main Engine Power | 30KW / 37KW / 45KW / 2×30KW / 2×37KW / 2×45KW |
| Overall Dimension | 6.5m×2.3m×2.35m / 6.8m×2.3m×2.5m / 8.7m×2.3m×2.5m / 9m×2.3m×2.5m |
System Composition
The integrated substation compressor consists of gas unloading system, compression system, gas storage system, refueling system, safety system and explosion-proof control system.
Gas Unloading System: Professional CNG gas extraction column for integrated equipment, with stable metering and adjustable measurement units to meet different national standard requirements.
Compression System: Composed of hydraulic system, gas compression system, cooling system and control system.
Compression Cylinder Structure: Three-section cylinder design. A single cylinder realizes two-stage compression. The gas compression cavity and hydraulic oil cavity are completely isolated with multi-stage sealing, realizing oil-free lubrication. No mixing of gas and oil occurs even under sealing leakage conditions. Few moving metal parts eliminate direct metal friction, greatly reducing wear.
Compression Cylinder Working Principle
The compression cylinder adopts hydraulic reciprocating double-acting structure with piston position sensing system. The motor drives the hydraulic oil pump for oil supply. The integrated reversing system drives piston reciprocation. Double-side cylinder layout supports continuous natural gas compression.
Technical Advantages of Our Liquid-Driven Substation Compressor
Compared with common liquid-driven compressors and traditional reciprocating compressors, our equipment has obvious competitive strengths:
1：Low Comprehensive Operation Cost
Simple cylinder structure: only piston and piston rod are moving parts. Wearing parts are only sealing components, spare parts consumption is only 10%~20% of traditional reciprocating compressors and diaphragm compressors, low failure rate and high reliability.
Vertical cylinder layout avoids deflection sealing, extends sealing service life and reduces replacement frequency.
Low cylinder load, long service life. High pressure boost realized by area ratio of hydraulic cylinder and air cylinder; low load of hydraulic system with low process difficulty.
Ultra-low linear speed of sealing ring for ultra-long service life.
2：Dual-system Design
Equipped with two independent systems. Each system can run separately (single system output is half of total displacement). Two systems can work simultaneously or serve as mutual backup, ensuring continuous gas supply.
3：No Unloading for Startup, Frequent Start-Stop Available
Hydraulic control separates motor operation and cylinder rotation. Startup and shutdown do not affect the unit. No need to exhaust internal high-pressure gas inside cylinder during startup, saving energy and improving working efficiency.
CNG Substation Refueling Process Introduction
1：CNG transport trailers deliver compressed natural gas to the CNG refueling station. Natural gas from trailer cylinders enters the gas dispenser through low-pressure pipeline for refueling when pressure meets vehicle demand.
2：When trailer pressure is lower than vehicle refueling pressure: medium-pressure cylinder group supplies gas for refueling.
3：When medium-pressure pipeline pressure cannot meet refueling demand: high-pressure cylinder group provides gas source.
4：When high-pressure cylinder pressure drops below 20MPa (adjustable), the compressor automatically starts to charge the high-pressure cylinder group.
The trailer acts as a low-pressure tank group. Gas storage bottles are divided into medium-pressure and high-pressure groups managed by PLC control system. At the beginning of filling, natural gas directly fills vehicle cylinders without passing through the compressor, making full use of high-pressure gas energy inside the trailer, lowering compressor startup frequency and power consumption.
On-Site Operation Cases & Running Performance
•4500m³ natural gas liquid-driven substation compressor: The first unit has accumulated over 9,000 operating hours. The customer purchased another 3 units in 2023 and 2024.
• Long-distance liquid-driven booster compressors: The first batch of 3 units accumulated 11,000 running hours. Phase II 3 sets were delivered in May 2022 with 8,000 cumulative working hours. Phase I & II equipment has transported 390 million cubic meters of natural gas. 3 mother station equipment for Phase III were ordered in 2024.
• 4800m³ natural gas liquid-driven mother station compressor, long-distance liquid booster compressor are all mature products with stable operation and high customer satisfaction after 2022 market launch.
Application Scenarios
•CNG refueling substation for buses, heavy-duty trucks, commercial vehicles
• Natural gas long-distance transmission booster station
• CNG mother station gas compression
• Containerized skid-mounted gas compression projects
• Overseas turn-key CNG station engineering projects
Why Choose Us
✅ Leading domestic technology in hydraulic-driven natural gas compressor field
✅ Largest displacement & lowest specific gas consumption under same power configuration
✅ Independent R&D with complete patent protection for large-displacement liquid-driven compressors
✅ Customized integrated solutions for global clients (Export service since 2024)
✅ Stable long-term operation verified by massive field operating data
✅ Full after-sales technical support for overseas projects
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