Upstream Pumping | John Crane

动态上泵送

Transforming the traditional concept of sealing

Applying gas seal spiral groove technology to wet seals

Overcome the Toughest Applications to Boost Equipment Longevity

Tackle High Heat Generation, Low-Lubricity, and Intermittent Dry-Running Conditions


We answer operators’ toughest challenges, improving seal and pump reliability, preventing unplanned downtime and reducing operating costs across a broad range of process industries, including:

John Crane’s unique, engineered, non-contacting Dynamic Lift Up-stream Pumping face technology borrows from gas seal designs to deliver a breakthrough in liquid sealing technology. This allows operators to:

  • Improve mechanical seal life
  • Increase mean time between repair (MTBR)
  • Reduce seal leakage to atmosphere when compared to a pressurized dual seal
  • Allow a clean inboard face fluid interface, even with dirty product
  • Deliver a simple support system ensuring face lubrication without the cost of a pressurized barrier system
  • Prevent solid build-up with slurries, scaling fluids or solids in suspension
  • Eliminate seal face flush to dissipate seal heat, reducing water usage
  • Address low water supply pressure challenges
  • Reduce power consumption and heat generation due to non-contacting technology

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