Hydraulic compressor
The hydrogen liquid-driven compressor unit from Dondel features 100% self-manufactured core components, enabling frequent start-stop cycles and pressure-start operation without wear concerns. Its modular design allows flexible combinations for multi-purpose applications, meeting diverse hydrogen filling and refueling requirements across various pressure environments.
Footprint reduced
60%
Max pressure
210 MPa
Core Advantage
Ultra-high pressure pure compression
- 210MPa military-grade pressure-resistant system
- Zero-pollution dual safeguards guarantee hydrogen purity: oil-free piston sealing technology
- Design of Oil-gas Isolation Chamber
Long-term energy saving and stable operation
- Level 4 cooling system (interstage/cylinder/rod pack/whole machine)
- Energy consumption reduced by 40%+ and operating temperature lowered by 30%
- Vibration ≤ 50μm, Noise ≤ 75dB(A)
Intelligent Control and Dynamic Response
- 0.02% F.S. (Frequency-Sensitive) micron-level motion control with sensor-accurate positioning
- Digital platform control enables fault prediction and remote operation and maintenance
Space Revolution and Flexible Deployment
- Modular multi-section integrated design reduces footprint by 60%
- The modular structure supports plug-and-play functionality
- Modules can be freely combined and upgraded flexibly
Minimal Maintenance and Long Life
- Quick-release sealing assembly reduces replacement time by 25%
- Frequent start-stop and pressurized startup are possible without concern for wear and tear
- High exhaust capacity per unit, high efficiency, and extended service life
Self-controlled, fully integrated ecosystem
- Independent intellectual property rights, with 100% self-developed core components
- Reduced overall costs with guaranteed delivery cycles
Application Scenarios of Hydraulic Compressor
Hydrogenation station
According to data from Xiangchenghui, a hydrogen energy industry research institution, China had built 426 hydrogen refueling stations by the end of June 2024, with 19 new stations added in the first half of 2024 alone.
The development of the hydrogen energy industry cannot be separated from technological innovation and the improvement of the industrial chain. At present, China has made significant progress in various aspects of hydrogen energy production, storage, transportation, and application. As an important equipment in the stages of hydrogen “production, storage, transportation, refueling, and application”, diaphragm compressors can compress gases with extremely high purity, generally reaching a purity of 99.999%.
Powder metallurgy
The core process of powder metallurgy consists of three stages: powder preparation → forming (e.g., pressing or injection) → sintering. However, sintered green bodies often exhibit defects such as porosity, low density, and uneven microstructure. Hot isostatic pressing (HIP), which applies uniform high-pressure gas (e.g., argon) at elevated temperatures, effectively eliminates internal porosity and refines grain size. This process significantly enhances the mechanical properties of powder metallurgy products, including density (approaching 100%), strength, and toughness.
The liquid driven compressor can provide the ultra-high pressure gas for this process.
Oil and gas multiphase flow
In the process of oil extraction, crude oil is often accompanied by natural gas and water.
Liquid compression can effectively compress and transport these mixtures, improving the efficiency of mining. Furthermore, in natural gas transportation, the liquid-gas mixed transport compressor plays a pivotal role by ensuring stable gas delivery under high pressure, thus meeting the demands of long-distance transmission.
Industrial ammonia production
The industrial ammonia production process is based on the Haber-Bosch process, with the core reaction being: N₂ + 3H₂ ⇌ 2NH₃ + heat The reaction must meet three critical conditions: ** “high temperature (300-500°C), high pressure (15-30 MPa), and catalyst (iron-based catalyst)” ** — with the “high-pressure environment” being pivotal for the forward progression of the reaction (higher pressure correlates with higher nitrogen conversion rate). The liquid drive compressor is the core equipment to realize the “high pressure feed gas transportation”, which mainly acts on the two key links of feed gas compression and circulating gas pressurization.
Hydrogen production from grey hydrogen and green hydrogen
In hydrogen production, sources such as fossil fuels and industrial by-product hydrogen are collectively referred to as gray hydrogen.
Hydrogen produced from wind and solar power is collectively referred to as green hydrogen.
The core function of liquid-driven compressors in hydrogen production is to perform pressurization and purification of hydrogen, as well as pre-pressurization for storage and transportation. These devices are critical for ensuring the efficiency, safety, and high purity of the hydrogen production process.
Parameters of Hydrogen Production Liquid Drive Compressor
| Product model | Intake pressure (MPa) | Exhaust pressure (MPa) | Volumetric flow rate (Nm³/h) | Crankshaft speed (r/min) | Motor power (KW) |
| DZ45-1500 | 5 – 20 | 45 | 1500 | 420 | 110 |
| DZ90-750 | 5 – 20 | 90 | 750 | 420 | 75 |
| DZ45-750 | 5 – 20 | 45 | 750 | 420 | 55 |
| DZ90-500 | 45 | 90 | 500 | 420 | 37 |
Parameters Table of Hydrogenated Liquid Drive Compressor
| Product model | Intake pressure (MPa) | Exhaust pressure (MPa) | Volumetric flow rate (Nm³/h) | Motor power (KW) |
| DLM45-1000 | 5 ~ 20 | 45 | 1000 | 90 |
| DLM45-500 | 5 ~ 20 | 45 | 500 | 45 |
Hydraulic Compressor: Application Case
200MPa Ultra High Pressure Liquid Drive Compressor Applied to material densification treatment
In the gas compression stage of hot isostatic pressing (HIP) technology, the compressor discharges ultra-high-pressure nitrogen or argon (200MPa) into the HIP furnace. This pressurized gas causes workpieces to undergo plastic deformation, creep, and diffusion welding under high-temperature and high-pressure conditions, effectively eliminating internal defects to achieve densification. Product specifications: Exhaust pressure 200MPa, 300Nm³/h. Customer feedback: To meet the ultra-high pressure requirements of the equipment, the R&D team at Dondel conducted multiple tests on components such as the 2-stage cylinder hydraulic seal and piston body seal, ultimately achieving stable operation under extreme pressure conditions. The system features an integrated design, with the compressor head and hydraulic station seamlessly combined to maximize space efficiency.
A large-scale ammonia production project in a farm in the United States
Provide products and services: 10+ sets of liquid-driven compressor units
Product specifications: The exhaust pressure ranges from 4MPa to 25MPa, with a single-unit displacement of up to 500 standard cubic meters per hour. Customer feedback: This batch of liquid-driven compressors not only boasts high integration, high compression ratio, and low energy consumption, but also incorporates specialized designs for U.S. operating conditions, with enhanced safety seals, low-temperature performance, and maintenance considerations. The DLM04-500 achieves a single-unit compression ratio of 3.26x, operates reliably at-40°C in winter, and features a highly modular design with interchangeable components, making it adaptable to diverse applications including hydrogen refueling stations and chemical synthesis. Customers have highly praised Dongde Hydrogens “customization capabilities.”
China Xinjiang Bachu County 5MW PV-Storage-Hydrogenation Integrated Project
The hydrogen energy demonstration project prioritized in Chinas Xinjiang region integrates green power generation, hydrogen production, storage, and refueling. It establishes an integrated operational model of photovoltaic + hydrogen production + storage + refueling, creating a complete hydrogen application closed loop covering source-grid-load-storage. This project demonstrates high-level integration and technological innovation.
Parameter: Exhaust pressure 20MPa, 600 standard cubic meters
