BD4 Pressure Reducing Regulator with Return Spring

BD4 Pressure Reducing Regulator with Return Spring

Dome-Loaded Pressure Reducing Regulator with Return Spring

The dome-loaded BD4 regulator is the same build as our BD3, but includes a bottom return spring for proportional band control. This setup is used when closed-loop feedback is required, making it a perfect partner for our QBX electro-pneumatic regulator. The BD4 has a diaphragm for better response and/or more precise pressure or vacuum control than piston-type regulator.

  • Large CVs
  • Easy inline maintenance
  • Ideal for piloting by Proportion-Air electro-pneumatic regulators

BD dome-loaded pressure regulators provide accurate pressure control of most industrial gases and liquids. All BD series valves are non-relieving. This series thrives in the oil & gas and petrochemical industries. These heavy-duty quality casted valves offer 1/2″ to 2” threaded ports and flange options from 1/2” to 8”.

  • Technical Specs
  • Downloads & Links
  • FAQ
  • Videos
  • Request Quote

Technical Specs

AccuracyDependent upon pilot
Max Inlet Pressure 3000 PSIG @ 100F (material specific)
Max Outlet Pressure 1000 PSIG @ 100F (material specific)
CV Rating Controllable range 4 to 220
Turn-down Ratio 1000:1
ShutoffANSI/FCI 70-3 Class VI
Operating Temperature -425 to 450 F
Set Points To Inches of Water Column

Downloads

File Request Form: Use this form to request a file other than a standard BD .STEP file

Submit the form below to download BD .STEP file

Frequently Asked Questions

    • Acetylene (C2H2)
    • Air
    • Argon (Ar)
    • Carbon Dioxide (CO2)
    • Chlorine (CI)
    • Dry Ice (CO2)
    • Helium (He)
    • Hydrogen (H2)
    • Methane (CH4)
    • Natural Gas
    • Nitrogen (N2)
    • Nitrous Oxide (N2O)
    • Oxygen (O2)
    • Propane (C3H8)
    • Sulfer Dioxide (SO2)
    • ​Many Others
    • Cryogenic Fluids
    • High Pressure Oil
    • Hydraulic Fluid
    • Lube/Hot Oil
    • Saturated Steam
    • Sour Gas
    • Water (Demineralized)
    • Diesel
    • Water
    • Mineral Spirits (Naptha)
    • Caustic Soda
    • 50-60% Sulfuric Acid
    • Fuel Oil
    • ISO VG 46
    • Wax
    • ​Many Others
    • 1/2″
    • 3/4″
    • 1″
    • 1-1/2″
    • 2″
    • 3″
    • 4″

    Flanges: 6″ and 8″

    • Cast iron
    • Carbon steel
    • Bronze
    • Stainless steel

    Consult factory for Hastelloy, Alloy 20 or other options.

    • 17-4 PH
    • 316L Stainless Steel
    • Monel

    Please consult factory for other options.

    • Neoprene
    • PTFE 6-Ply
    • Viton
    • EPDM
    • Metal (316 SS)

    Many other options available; please consult factory.

    • Polyurethane
    • PTFE
    • RTFE
    • Kel-F
    • 70 Durometer Polyurethane
    • EPDM
    • Viton
    • Buna-N
    • TFM
    • Elastomeric diaphragm
    • Metal diaphragm
    • Piston
    • NPT
    • Flange
    • Tube End
    • Socket Weld
    • Butt Weld
    • Swagelok Fitings
    • Tri-Clamp
    • SAE
    • BSPP
  • Minimal due to balanced design. Outlet pressure change by 3 to 8 PSIG for every 100 PSIG variation in inlet pressure, either directly or inversely.

Product Videos

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