The L-CNG Plunger Pump Skid is a factory-assembled high-pressure LNG pressurization system engineered for L-CNG refueling stations and industrial gas distribution projects. Integrating a cryogenic plunger pump, drive system, high-pressure process piping, PLC controls, and safety instrumentation on a single skid, it delivers stable LNG pressurization before high-pressure vaporization while reducing installation time and simplifying field commissioning.
Specifications
| 1. Form | Horizontal, piston type, fixed speed |
| 2. Column count | Double column |
| 3. Design temperature | -196 ° C |
| 4. Medium used | LNG (liquefied natural gas) |
| 5. Maximum inlet pressure | 1.6MPa |
| 6. Minimum inlet pressure | 0.02MPa |
| 7. Maximum working pressure | 25MPa |
| 8. Design pressure | 27.5Mpa |
| 9. Flow rate | 1500L/h liquid) |
| 10. Piston diameter | 41mm |
| 11. Piston stroke | 56mm |
| 12. Working hours | Can run intermittently or continuously for 24 hours |
| 13. Dimensions (length x width x height) | (4000 * 2250 * 2540) mm |
Product Features
Stable High-Pressure Output
The reciprocating plunger pump provides consistent LNG discharge pressure up to 25 MPa, ensuring uninterrupted gas supply during continuous vehicle fueling and peak demand periods.
Long-Term Cryogenic Operation
All wetted components are manufactured from cryogenic-grade stainless steel with precision-machined sealing surfaces to minimize wear, leakage, and performance degradation under repeated low-temperature operating cycles.
Reduced Maintenance Downtime
The modular pump head and valve assembly allow routine replacement of seals, valve inserts, and other wear components without removing the skid piping, reducing maintenance time and station shutdown.
Integrated Automation and Safety Protection
The PLC-based control system continuously monitors pressure, temperature, motor status, and emergency shutdown signals, enabling automatic protection and reliable unattended operation.
Fast Maintenance Access
Wide operational clearance around the cryogenic pump head allows quick replacement of wear seals and valve inserts without dismantling main process piping.
Customization Options
|
Item |
Options / Range |
|
Flow Capacity |
Configured per station demand requirements |
|
Max Outlet Pressure |
Up to 25 MPa |
|
Drive Power |
Tailored to flow & pressure ratings |
|
Control System |
PLC / Touch Screen HMI / Remote SCADA Ready |
|
Electrical Supply |
380V / 400V / 415V / 440V (50/60 Hz) |
|
Explosion Protection |
ATEX / IECEx / CNEX Compliant Options |
|
Instrument Brands |
Siemens, Schneider, ABB, or buyer-specified |
|
Piping Material |
Stainless Steel 304 / 316L |
|
Protocol |
Modbus RTU / Modbus TCP / Ethernet / Industrial CAN |
Manufacturing & Quality Control
Every skid is manufactured and inspected according to documented quality procedures before shipment.
Raw material verification for pressure-bearing components
Precision machining inspection of plunger and valve assemblies
High-pressure hydrostatic testing
Cryogenic sealing verification
Nitrogen leak testing
Flow rate and outlet pressure validation
PLC logic simulation and emergency shutdown testing
Final Factory Acceptance Test (FAT)
Engineering Documentation Package
To ensure smooth station integration and compliance approval by local authorities, every shipment includes a complete technical dossier:
General Arrangement (GA) Drawings & Foundation Requirements
Process & Instrumentation Diagram (P&ID)
Electrical Schematics & Interconnect Wiring Diagrams
Factory Acceptance Test (FAT) & Hydrostatic Inspection Certificates
Material Traceability Certificates for Wetted Pressure Components
Comprehensive Operation & Maintenance (O&M) Manuals in English
Packaging & Delivery
Structural Framing: Heavy-duty steel base skid bolted securely for ocean and land transport.
Electrical Protection: PLC and control cabinets sealed in export-standard wooden cases with desiccant protection.
Cryogenic Components: Valves, instrumentation, and piping capped and film-wrapped against moisture and contaminants.
Logistics Compatibility: Sized for standard dry containers, open-top containers, or flat rack shipping.
After-Sales Support
Technical support continues throughout equipment installation and operation.
We provide:
- Remote commissioning assistance
- Spare parts recommendations based on operating hours
- Maintenance manuals and troubleshooting guides
- PLC parameter backup files
- Lifetime technical consultation
- Optional on-site commissioning and operator training
FAQ
Q: How do I determine the required plunger pump capacity for my L-CNG station?
A: Pump capacity depends on daily LNG consumption, dispenser quantity, simultaneous fueling demand, and operating pressure. Our engineers calculate the appropriate flow rate based on your station layout and expected vehicle throughput rather than selecting a standard model.
Q: Can the skid be integrated with an existing LNG storage tank and vaporizer?
A: Yes. The skid is designed to connect with both new and existing LNG storage systems. Piping interfaces, electrical supply, communication protocols, and control logic can all be configured to match existing station equipment.
Q: What factors affect the service life of a cryogenic plunger pump?
A: Service life is primarily influenced by LNG cleanliness, operating frequency, discharge pressure, preventive maintenance, and timely replacement of wear components. Proper operating conditions significantly extend seal and valve life.
Q: What information should be provided before requesting a quotation?
A: To recommend the correct configuration, we typically require:
Required outlet pressure
LNG flow rate
Daily fueling capacity
Local power supply
Hazardous area classification
Preferred control system
Site layout or P&ID (if available)
Q: Can the skid comply with different international project standards?
A: Yes. Electrical components, explosion-proof ratings, instrumentation, documentation, and inspection requirements can be configured to comply with project specifications or regional standards required by the destination market.
Q: Which spare parts should be stocked for long-term operation?
A: Common recommended spare parts include plunger seals, valve inserts, O-rings, gaskets, sensors, and other routine wear components. Spare parts packages can be supplied according to expected annual operating hours.
Q: What is the typical production lead time?
A: Lead time depends on configuration, component selection, and project quantity. Standard models generally require fewer manufacturing weeks than fully customized systems. The final schedule is confirmed after technical specifications are approved.
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