Single Stage Centrifugal Pump

Product Description

 

The single stage centrifugal pump is a vertical centrifugal unit with a single impeller stage, engineered for cryogenic transfer duties where moderate head and high flow are required with a compact, mechanically simple design. It handles LNG, liquid nitrogen, liquid argon, ethylene, LPG and ethane at temperatures down to -196°C, and its simplified rotor layout reduces maintenance points compared with multistage machines. Flow capacity ranges from 0.5 m³/h up to 2,500 m³/h with heads up to 900 m depending on the impeller diameter and speed selected for the duty point. Because there is only one impeller, the hydraulic design can be optimized for the exact duty point, and the simpler rotor reduces the number of components exposed to cryogenic temperature. This makes the single stage pump a practical choice for transfer duties where the head requirement is moderate but the flow requirement is high, such as bulk liquid nitrogen supply and small and medium filling stations. The vertical configuration keeps the footprint compact while maintaining favorable suction behavior from storage tanks.

For a single-stage machine, impeller hydraulic accuracy and material integrity determine reliability, so wetted components are made from stainless steel, copper alloys or forged aluminum alloys and precision-machined to maintain tight clearances at cryogenic temperature. Every pump is 100% performance-tested on our in-house cryogenic platform with liquid nitrogen as the test medium, and each unit ships with a complete test report. We support OEM production and drawing-based manufacturing, and our engineering team configures impeller hydraulics and materials around your medium and operating conditions. Impeller diameter and speed are selected at the duty point rather than from a standard curve, and the pump is 100% tested with liquid nitrogen on our cryogenic bench. For customers with a defined transfer cycle, we also document start-stop behavior and suction conditions in the selection file, so the pump arrives sized to the application. OEM and drawing-based manufacturing are supported, with drawings and interfaces confirmed before production.

Customization

 

Impeller diameter and speed, material grade, seal type and flange interfaces are selected around the duty point. OEM and build-to-spec manufacturing supported after engineering review.

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Packaging follows export practice with dedicated wooden crates, moisture, rust and shock protection, and fixed internals. FCA or FOB terms are standard; other terms evaluated per destination. Custom units typically ship 32 weeks from technical approval.

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