Back Pressure Regulators (BPRs)

  • Proven Outgassing Protection
  • Flow-Independent Pump Preload for Greater Pump Efficiency
  • 5 to 1000 psi Cartridges and Assemblies Available

Upchurch Scientific® offers a full line of factory preset back pressure regulators, designed to enhance system performance through outgassing prevention and improved pump check valve efficiency.

Small gas bubbles often form as solvent moves from the high pressure of an HPLC column to the low pressure environment leading to the detector. This outgassing can cause erratic baseline readings and loss of sensitivity. Placing an Upchurch Scientific BPR (usually a 40 - 100 psi) after the detector provides an excellent, low-cost method for preventing this problem by maintaining enough back pressure on the mobile phase to keep gases dissolved in solution.

A back pressure regulator can also be used as a pump preload for low and fluctuating pressure applications. Many of today's pumps require a steady back pressure to function properly. Install an Upchurch Scientific BPR (usually 500 - 1000 psi) between the pump and the injector to enhance pump performance.

Caution: Do not exceed the maximum operating pressure of your system - please refer to the operating manuals for your system components before choosing the appropriate BPR.

Our line of back pressure regulators includes:

  • 5 and 20 psi Assemblies (replacement cartridges not available)
  • 40, 75, 100, 250, 500, 750 and 1000 psi Cartridges and Assemblies
  • PEEK™ and Stainless Steel BPR Holders
  • High Pressure Adjustable BPR for pressures between 2000 and 5000 psi
  • Ultra Low Volume BPRs set to 100 and 500 psi