Model DA4 Pressure Reducing Regulator, Pressure Loaded Diaphragm

Model DA4 is high performance, pressure loaded diaphragm-type, flow-to-open pressure reducing regulator. Design includes an internal pressure balancing piston cylinder that provides high flow capacity and high pressure drop capability. The internal trim design allows the same basic unit to cover a broad range of pressure settings. Performance meets or exceeds that of competitive pressure loaded or pilot-operated designs. The DA4 regulator is applied primarily in clean gaseous service, but may also be applied as a liquid or steam valve. Truly a “DO-ALL” pressure regulator.

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. Used as a utilities – air, oil, water, steam – regulator. Corrosive and non-corrosive chemical services – gas or liquid – are possible with broad materials range. 

  • Versatile: Five basic materials and multiple trimmaterial combinations to select from. Multiple methods of pressure loading.
  • Tight Shutoff: Multiple composition materials provide Class IV or VI inboard leakage rates. Designed as a soft-seated valve.
  • Capacity: Highest in the industry. Allows smaller body sizes than competitors in majority of applications.
  • Droop: Highly accurate outlet pressure control, due to absence of range spring in design, provides almost zero “droop effect”.
  • Pressure Drop: One of highest in the industry when coupled with high flow capacity.
  • Trim Design: “DO-ALL” trim design provides FTO and pressure balancing for higher inlet pressure. Results in unmatched sensitivity and stability. Internals are cage-contained
    with in easily removable quick change trim.