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
| Accuracy | Dependent 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 |
| Shutoff | ANSI/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.