Model DA6 Back Pressure Regulator, Pressure Loaded Diaphragm

The Model DA6 is a high performance, pressure loaded, back pressure regulator with top-guided piston-cylinder that provides high flow capacity and high pressure drop capability. Internal trim design allows the same basic unit to cover a broad range of pressure settings. Performance approaches that of competitive pilot operated designs in the basic design.. Applied primarily in clean gaseous service, but also can be applied as a liquid or steam valve. Truly a “DO-ALL” pressure regulator. Requires auxiliary pressure loading fluid.


“DO-ALL” concept allows application of all types of clean fluids. Designed primarily as a gaseous service valve, can be applied in liquid service applications where excessive cavitation or flashing is absent. Excellent for atmospheric industrial gases – GN2, GOX, Ar, He, H2, CO2 – as well as a natural gas regulator. Usedas a utilities – air, oil, water, steam – regulator. Corrosive andnon-corrosive chemical services – gas or liquid – are possiblewith broad materials range.

  • Versatile: Four basic materials and multiple trim material combinations to select from.
  • Tight Shutoff: Multiple composition materials provide Classes II, IV or VI inboard leak age rates.Designed as a soft-seated valve.
  • Capacity: Highest in the industry. Allows smaller body sizes than competitors in majority of applications.