Lawrence Pumps' industrial cryogenic pumps are used for handling liquids such as Oxygen and Nitrogen, at temperatures as low as -320°F. Our top suction design of our pump has become a standard in the industry for handling fluids which are near or at boiling point without vapor binding. Design considerations for our cryogenic pumps include special metallurgical considerations due to low temperatures and flammability of liquefied gases such as liquid oxygen, thermal expansion and contraction and material behavior at cryogenic temperatures, and extremely low NPSH.
| Capabilities Single-Stage: | | | Flows to 4000 GPM (1819 m3/hr) | | | | Temperatures from -200° F to 700° F (-93° C to 371° C) |
| | Pressures to 300 PSIG (20.6 Bars) | |
| Capabilities Multi-Stage: | | | Flows to 4000 GPM (1819 m3/hr) | | | | Temperatures from -200° F to 700° F (-93° C to 371° C) | | | Pressures to 300 PSIG (20.6 Bars) | | |  |
Impellers may be either of the semi-open or enclosed design (seen right) and are keyed to the shaft. Both single and multi-stage cryogenic pumps can be designed to incorporate an inducer for low NPSH applications. Inducers are individually sized for each application. Sensitive thermocouples are used to detect and monitor the liquid level in the pump column. This safety feature ensures that the labyrinth seals operate in vapor phase. Icing at the support plate is eliminated. Easily replaceable cartridge assemblies are mounted in the bearing frame above the top mounting plate. This configuration provides greater support for the pump shaft and eliminates the reliance of the drive motor's bearings. Shaft sealing is provided by a precision labyrinth seal which operates at the suction pressure of the pump. This labyrinth seal eliminates the requriement for costly and failure-prone high pressure gas seals.
 | | Product Applications | Liquid Oxygen
Liquid Nitrogen
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