High Performance Labyrinth Sealed Cryogenic Centrifugal Pump

Core Features & Technical Advantages

1. Advanced Labyrinth Sealing Technology

The pump is equipped with a high-precision labyrinth seal system, which is the core advantage distinguishing it from traditional cryogenic pumps. The labyrinth seal consists of multiple alternating stationary and rotating teeth, forming a series of annular gaps that create a tortuous flow path for the cryogenic medium. This structure effectively blocks the leakage of cryogenic liquid and its vapor, achieving excellent sealing performance without direct contact between seal components. Unlike mechanical seals, the labyrinth seal has no wearing parts, ensuring long-term stable operation with a service life extended by 30% compared to conventional sealed pumps, and reducing maintenance frequency and costs significantly.

2. Superior Cryogenic Resistance

Designed to adapt to ultra-low temperature working conditions, the pump maintains stable performance in the temperature range of -196℃ to -50℃, without brittle fracture, deformation, or performance degradation. Key components such as the pump body, impeller, and shaft are made of high-quality cryogenic-resistant materials: austenitic stainless steel (304L/316L) for the pump body and impeller, ensuring excellent toughness and corrosion resistance at low temperatures; martensitic age steel (17-4PH) for the shaft,deep cooling treatment to enhance low-temperature strength and wear resistance. The pump head is wrapped in a high-vacuum insulation jacket to minimize cold loss, ensuring consistent operation even in long-term low-temperature environments.

3. Explosion-Proof Safety Design

In line with international explosion-proof standards (ATEX, IECEx), the pump's motor and electrical components adopt explosion-proof configurations to eliminate potential ignition sources in explosive atmospheres. The hermetically sealed motor housing, combined with the labyrinth seal's leakage prevention, effectively prevents the ingress of flammable cryogenic vapors into the motor, ensuring safe operation in harsh environments where flammable and explosive media are present. This dual safety protection design greatly reduces the risk of leaks, fires, and explosions.

4. High Efficiency & Stable Operation

Adopting an optimized hydraulic design and low-dynamic-asymmetry impeller, the pump achieves high flow rates and head while reducing energy consumption by 15-25% compared to traditional cryogenic pumps. The labyrinth seal's non-contact design minimizes friction and energy loss, further improving operational efficiency. The optimized pump structure reduces outlet pressure pulsation, ensuring stable motor load, low noise (≤75dB), and low vibration, which is suitable for long-term continuous operation in industrial scenarios.

Application

LNG Industry: LNG terminals, gasification stations, refueling stations, and transportation transfer systems

Air Separation Industry: Transfer of liquid nitrogen, liquid oxygen, and liquid argon in air separation plants

Petrochemical Industry: Low-temperature reaction systems, cryogenic storage, and cryogenic medium handling in processing

Hydrogen Energy Industry: Liquid hydrogen transfer in hydrogenation stations and storage & transportation systems

Other Industries: Industrial gas processing, low-temperature laboratories, and cryogenic refrigeration systems