LNG Filling Station Equipment
Cryogenic engineering for clean energy fueling — complete LNG filling station systems including storage tanks, submersible pumps, pump skids, dispensers and PLC control, built to order and supplied as OEM/ODM equipment under your own station branding.
This is a custom-engineered product line rather than a stocked catalog item — every station is specified and built to your project requirements.
How an LNG Filling
Station Works
Supervised end-to-end by the PLC station control system, from tanker unloading through to vehicle charging.
Four Core Functions of the LNG Filling System
Unloading
Pressure-equalized transfer from tanker to storage tank, self-pressurized or pump-assisted.
Filling
Precooled, metered delivery from storage tank to vehicle cylinder via mass flowmeter.
Pressure Regulation
Self-pressurization, pump-assisted pressurization and saturation adjustment keep delivery stable.
Safety Venting
Automatic relief valves, emergency shutdown and gas-detection interlocks protect the station.
Understanding LNG
LNG is natural gas cooled to a cryogenic liquid for compact, efficient transport and storage. Knowing its properties — alongside the media it is often handled with — is the foundation for safe station design and operation.
Natural Gas (NG)
- Composition
- Methane (CH₄)
- Density (STP)
- ≈ 0.7 kg/m³
- Appearance
- Colorless, odorless
- Behavior
- Lighter than air, disperses quickly
- Flammable Range
- 5%–15% in air
LNG
- State
- Cooled to −162℃ at atm. pressure
- Density
- ≈ 420–460 kg/m³
- Compression Ratio
- ≈ 600:1 vs. NG
- Appearance
- Forms white fog when vaporizing
- Energy Value
- 1 m³ ≈ 687 L gasoline / 520 L diesel
Liquid Nitrogen (LN₂)
- Composition
- Nitrogen (N₂)
- Boiling Point
- ≈ −196℃ at atm. pressure
- Appearance
- Colorless liquid
- Behavior
- Large liquid-gas expansion ratio
- Use on Station
- Instrument-air backup / purge gas
10 Integrated Systems, One Station
LNG Storage Tank
A specialized cryogenic vessel for storing LNG. Available in horizontal or vertical configuration, with vacuum-perlite-powder or high-vacuum multilayer insulation wrapped in radiant heat-reflective foil. Each tank includes a safety valve to prevent the internal medium from exceeding safe pressure.
Key components: low-temp cutoff valve · DP level gauge · tank body · safety valve · 3-way switch valve · low-temp emergency shutoff valve
LNG Submersible Pump
The primary power source for LNG transfer, driven by an electric motor with a centrifugal impeller submerged in LNG. Minimum working temperature −196℃, cryogenic-resistant, wear-resistant sealing materials, and variable-frequency control for adjustable speed and outlet pressure. Available in multiple brand configurations.
- Max Head
- 300 m
- Max Flow
- 350 L/min
- Speed
- 5500 rpm
- Motor Power
- 18.5 kW
- Max Head
- 320 m
- Max Flow
- 350 L/min
- Speed
- 5400 rpm
- Motor Power
- 15 kW
- Max Head
- 330 m
- Max Flow
- 10–25 m³/h
- Speed
- 5410 rpm
- Motor Power
- 15 kW
Power supply: 380 V (50 Hz) — all models
LNG Pump Skid
Integrates the LNG submersible pump, vacuum pump pit, vacuum piping, ambient vaporizer, cryogenic valves and instruments onto a single explosion-proof-certified frame for fast, standardized field installation and simplified maintenance.
- ▸Explosion-proof certified for high safety performance
- ▸High integration — fast on-site installation
- ▸Local display of key parameters for easy monitoring
- ▸PLC-linked for automated, low-manual-intervention control
Unloading Skid
Integrates the process components and control devices used at the LNG tanker unloading point onto a single skid, with fully explosion-proof electrical equipment throughout.
- ▸All unloading-point piping & controls fully integrated
- ▸Local display of unloading pressure for easy observation
- ▸PLC-linked automated control reduces manual operation
- ▸Components: low-temp cutoff valve, e-stop button, pressure gauge, audible/visual alarm, gas detector
Ambient Vaporizer
Converts LNG into NG through natural heat exchange between the finned-tube coil and ambient air — no external heat source required.
LNG Dispenser
The metering terminal that fills LNG directly into vehicle-mounted cylinders. One-touch precooling and filling, dual-side backlit LCD display, IC-card automated settlement, and full remote-monitoring connectivity to the station management system.
- ▸One-touch precool & fill · dual-side backlit LCD (volume/mass, amount, unit price)
- ▸Preset & non-preset filling modes · built-in clock · tiered password access
- ▸Power-outage data protection · auto fault detection & code display
PLC Station Control System
Monitors and manages storage tanks, pumps, process valves and dispensers — handling data acquisition, automated control, real-time display and alarm functions across the entire station.
Control-Panel Features
- ▸Real-time equipment status display, query & fault alarms
- ▸Interlocked emergency shutdown of process valves
- ▸Combustible-gas detection & alarm system integrated
- ▸Data management, query, and upload to back-office systems
Cryogenic Valves & Instrumentation
Every valve and instrument is rated for cryogenic LNG service, with certified explosion-proof electronics throughout.
Instrument Air & Gas Safety System
The instrument air system supplies pressurized, dried air or nitrogen to power pneumatic valves station-wide. The gas-safety system continuously monitors for combustible-gas leaks and triggers automated alarms and interlocks.
Patented LNG Dispenser Technology
Segmented Vacuum Module
Reduces cold loss with an optimized structure and ample service access.
Dual-Phase Breakaway Valve
Breakaway force 400–600N protects both liquid and vapor lines.
Imported Mass Flowmeter
Emerson / E+H units with pressure & temperature compensation, self-diagnosing zero calibration.
Smart Fill Protection
Precool detection, overfill prediction, auto-stop on breakaway, dual-nozzle interlock.
Data Traceability
≥20,000 transaction records retained 6+ months; encrypted management lock.
Anti-Theft Circulation
Large-loop circulation design prevents liquid theft.
ESD Interlock Control
Dispenser ESD button enables station-wide interlocked protection.
Intrinsically Safe Design
Explosion-proof construction with auxiliary fueling capability.
Case Studies — Installed Stations
CDI-built LNG station equipment in daily service at fueling sites operated by major national and regional fuel networks, supplied as complete containerized skids or as OEM/ODM equipment integrated into the operator's own station branding.
Left: containerized station body, customer-branded exterior with the built skid and systems inside. Right: live SCADA screen from a real station in the field running the same PLC control platform shown above.
Why It Matters
- ▸Proven in daily operation at national-network fueling sites, not just lab-tested
- ▸Same PLC/SCADA platform verified running live in the field
- ▸Consistent build quality across every container CDI ships, regardless of end-customer branding
Built for Operators Who Can't Afford Downtime
Full Manufacturing, OEM & ODM
End-to-end fabrication of cryogenic vessels, skids and control systems, plus OEM/ODM branding for operators.
ISO & Explosion-Proof Certified
Products carry ISO management system certification and national explosion-proof approval.
30+ Patents · 40,000 m² Base
Proprietary cryogenic engineering IP, produced at a purpose-built manufacturing complex in Jiangxi.
Exported to 30+ Countries
LNG and fuel equipment shipped across Europe, the Americas and beyond.
Precision CNC & Rigorous QC
Multi-stage quality inspection through precision CNC machining and cryogenic vessel welding.
Responsive After-Sales Support
Fast-response technical support for commissioning, maintenance and spare parts.
Let's Build Your LNG Station Together
Every LNG station is engineered to project requirements. Contact our team to scope storage capacity, dispenser count and station layout.
No. 8 Yigong Avenue, Yuanzhou District, Yichun City, Jiangxi, China