![\"Vertical](\"https:\/\/www.longgangpump.com\/wp-content\/uploads\/2026\/09\/How-to-Select-a-CO2-Booster-Pump-for-CCUS-Projects-Structure-Seals-and-Materials_inline_1-1.jpeg\")
<\/figure>\nWhy Dense-Phase CO2 Changes Pump Selection<\/h2>\n
A CO2 booster pump does not behave like a water pump with a different nameplate. Carbon dioxide can move close to phase boundaries, and small changes in pressure or temperature may affect suction stability. Gas pockets, poor lubrication, and low-temperature effects can reduce hydraulic performance and increase stress on seals and bearings.<\/p>\n
The Qilu Petrochemical-Shengli Oilfield project describes liquid CO2 characteristics such as easy gasification, low lubricity, and low temperature. Those points are enough to shape the selection logic without inventing a pump model, seal plan, or material grade that has not been released.<\/p>\n
Start with the CO2 Booster Pump Duty Point<\/h2>\n
The first engineering step is to define flow, head, suction pressure, discharge pressure, temperature, density, NPSHa, phase margin, and allowable operating window. In CCUS pipeline service, the duty may include startup, shutdown, recycle, pressure ramping, and off-design operation. A stable rated point is necessary, but it is not the whole specification.<\/p>\n
The CCUS system transports carbon dioxide at about 10.0 MPa and delivers it as dense-phase carbon dioxide to geological oil wells. That pressure context explains why the pump should be evaluated as part of a high-pressure transport system, including control logic, monitoring, and upstream phase management.<\/p>\n
Select the Pump Structure for Pressure and Phase Stability<\/h2>\nHigh-Pressure Centrifugal Structures<\/h3>\n
A high-pressure centrifugal pump for CO2 service must build head without creating unstable inlet conditions or excessive rotor loading. Longgang Pump’s high-pressure pump families include BB2, BB4, and BB5 structures for different combinations of head, pressure, temperature, and maintainability. The exact CO2 project model should not be assumed, but these product families show the structural options engineers can review.<\/p>\n
\u0397 LBD(BB2) \u03c7\u03b7\u03bc\u03b9\u03ba\u03ae \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03b1\u03c3\u03af\u03b1 \u03ba\u03b5\u03bd\u03c4\u03c1\u03bf\u03c6\u03c5\u03b3\u03b9\u03ba\u03ae \u03b1\u03bd\u03c4\u03bb\u03af\u03b1<\/strong><\/a> is built for high-temperature, high-pressure, and corrosive process media, with a centerline-mounted, dual-end support structure. For higher-head services, Longgang Pump’s BB4 and BB5 multistage ranges extend the discussion toward staged pressure rise, bearing selection, and axial-force balancing.<\/p>\n Suction design is central to CCUS pump reliability. If liquid CO2 enters a pump close to vaporization, cavitation-like behavior and gas entrainment can damage performance. The pump, upstream piping, control valves, temperature management, and startup method all need to protect phase stability.<\/p>\n The Qilu solution includes system dynamic analysis, key structural optimization, a self-balancing structure, a honeycomb ring structure, composite drag reduction technology for impeller surfaces, and a long pump shaft ultra-deep grinding process. These details show the level of engineering attention required for long-distance carbon dioxide transport.<\/p>\n Mechanical seal selection for a CO2 booster pump should be based on pressure, temperature, low lubricity, vaporization risk, and process safety. Seal faces and secondary sealing elements must remain stable at the operating temperature and pressure. The support system must also control heat, pressure, and any phase change near the seal faces.<\/p>\n A standard seal arrangement is not enough for dense-phase CO2. The seal decision must account for pressure, temperature, low lubricity, vaporization risk, and process safety. For Longgang Pump applications, the final selection still belongs to the project engineering review of the complete operating envelope.<\/p>\n Material selection for carbon dioxide transport should consider low temperature, pressure, possible moisture-related corrosion, wear surfaces, and shaft stability. The casing, impeller, shaft, balance parts, rings, bushings, and seal-contact parts all influence reliability. In low-lubricity service, surface finish and running clearance can matter as much as the base metal.<\/p>\n Longgang Pump’s CO2 transport solution emphasizes stability, efficiency, cavitation performance, and service life. Practical selection should therefore cover the operating envelope, phase analysis, seal environment, material basis, rotor dynamics, and testing approach before a pump package is approved.<\/p>\n![\"Chemical](\"https:\/\/www.longgangpump.com\/wp-content\/uploads\/2026\/09\/How-to-Select-a-CO2-Booster-Pump-for-CCUS-Projects-Structure-Seals-and-Materials_inline_2-1.jpeg\")
<\/figure>\nSuction Design and Anti-Gasification Protection<\/h3>\n
Mechanical Seal Selection for CO2 Booster Pumps<\/h2>\n
Material Selection for Low-Lubricity CO2 Service<\/h2>\n
![\"High-pressure](\"https:\/\/www.longgangpump.com\/wp-content\/uploads\/2026\/09\/How-to-Select-a-CO2-Booster-Pump-for-CCUS-Projects-Structure-Seals-and-Materials_inline_3-1.jpeg\")
<\/figure>\nWhat the Qilu CCUS Project Demonstrates<\/h2>\n