White Knight Fluid Handling

Model PSA Series - Bellows Pumps



PSA Series pumps are the ideal solution for ambient temperature, ultra-high purity recirculation and delivery applications. These PTFE/PFA pumps are completely metal free and operate with the unique White Knight shuttle valve, which eliminates the need for complicated detents and manual resets. They perform safely and reliably running continuously throughout their two-year warranty. They may be run at air supply pressures up to 7 BAR (100 PSI) and are capable of running in thermal cycling applications with fluid temperatures up to 100°C (212°F) without a cooling jacket. The pumps are available in four models, PSA015, PSA030, PSA060 and PSA140, which are capable of max flowrates of 15, 30, 60 and 140 LPM, respectively.

  • 100% Metal-Free
  • Process-safe PTFE/PFA flow paths
  • Leak-proof, machined design
  • No O-rings; never retorque
  • No lubrication in shift mechanisms
  • No impellers or magnets in fluid path
  • Pneumatic Logic™ minimizes liquid pulsation and pump vibration
  • Various liquid connection styles and sizes
  • Safe, leak-free operation due to no-metal design
  • Polypropylene heads and ceramic in air shuttle valve
  • Minimal parts for durable design
  • Class 100 cleanroom assembly, testing, and packaging
  • Easy to install and service
  • Robust bellows allow for supply pressure of 7 Bar (100 PSI)
  • Dead-head capable operation
  • No preventative maintenance during two-year warranty


PSA Series pumps feature White Knight’s Pneumatic Logic™, a detent-free shuttle valve design that improves performance and reliability by minimizing vibration, pulsation and wear.

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