High Pressure LNG Pump

Boosting LNG to Ultra-High Pressures

 

The high pressure LNG pump is designed for LNG peak-shaving stations, high-pressure pipeline networks, and high-pressure direct-injection fuel systems for heavy trucks and marine engines. It takes low-pressure LNG and boosts it to ultra-high pressures-up to 100 MPa-for supply to high-pressure vaporizers or direct high-pressure filling applications. The pump is available in reciprocating plunger or high-pressure multistage centrifugal configurations, selected based on the flow and pressure requirements of each specific installation.

For reciprocating versions, the plungers and valve assemblies are manufactured from high-strength, wear-resistant alloys validated for -162°C LNG service. Specialized cryogenic high-pressure sealing components maintain reliable performance under the combined challenge of ultra-low temperature and cyclic pressure loading. For centrifugal versions, the multistage design uses precision-machined impellers and diffusers with bearings and seal systems validated for cryogenic high-pressure operation. Axial thrust is managed through balancing discs or drums, which protect bearings and seals over extended operating periods.

Centrifugal versions cover flow rates from 0.5 m³/h up to 2,500 m³/h with heads up to 2,600 meters. Reciprocating versions handle flows from 0.4 m³/h upward with discharge pressures from 25 MPa to 100 MPa. The inlet flow path is optimized to suppress cavitation at cryogenic temperatures, and the discharge side is fitted with pulsation dampeners to ensure stable supply to downstream systems.

Testing and Quality Assurance

 

Each pump undergoes full performance testing on the company's in-house cryogenic test bench. Third-party inspection and customer witness testing can be arranged. The company holds ISO 9001, 14001, and 45001 certifications, and the engineering team has led multiple national-level cryogenic pump research and engineering projects.

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For custom-engineered pumps, the lead time from technical approval to delivery is typically 32 weeks. The company provides full engineering support from operating condition assessment through structural design and validation. After delivery, installation guidance, commissioning assistance, spare parts supply, and long-term technical consultation are available as specified in the contract. Assistance with classification society certification can be provided where required.

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