Dome Loaded, Back Pressure Regulators (replacement for Mity Mite 91W)

The dome loaded Premier P91W Series serves as a replacement for the Mity Mite 91W, and features a new and improved diaphragm seal. The P91W Series dome-loaded, back pressure regulator operates to maintain a constant upstream pressure by sensing the upstream pressure and limiting it through constant throttling.  The dome must be charged (externally) from a gas pressure source; two NPT connections are available (1 for dome loading and the second for an optional gauge). The P91W Series features a control pressure range of 100-2000 PSIG (6.89 – 137.9 bar) / 100-3000 PSIG (6.89 – 206.84 bar), Gylon® 3522 diaphragm, Cv: 0.38 or 0.17 and can be used to control both gases and liquids as compatible with the materials of construction.

  • New and improved PTFE diaphragm seal
  • External dome load
  • Cv: 0.38 or 0.17
  • Machined bar stock body, bonnet and piston eliminates porosity found in castings
  • Optional precharge isolation valves available
  • Precharge isolation valves
  • Gauges
  • Private label