Low temperature bellows sealing is a sealing technology used in extreme low temperature environments, which ensures the safety of pumped fluids while providing long-term reliability. When designing pumps for transporting low-temperature fluids, special designs are often used, such as vertical multi-stage double shell pumps according to the American Petroleum Institute (API) 610 standard. These pumps have a heating chamber called a cofferdam that can thermally isolate the shaft seal from the cold pumped fluid, allowing for the use of traditional sealing techniques

Low Temperature, Rotating Head Metal      Bellows  Shaft Seal

 Temperature:  -75℃～ 200℃      Pressure:  ≤2.1MPa       Speed:  ≤25m/s      

Equivalent John Crane Type 680       Rotary Ring: SiC/Carbon/TC

● Stationary Ring:  SiC/TC

● Secondary Seal:  VITON/PTFE Coated VITON/PTFE

● Metal Bellows:  SUS316L/AM350/Hastelloy-C/

 ● Other Parts:  SUS304/SUS316/Hastelloy-C