Model 30BP Midget Precision Back Pressure Regulator from Rotork Fairchild

Model 30BP Midget Precision Back Pressure Regulator from Rotork FairchildModel 30BP is a compact precision pressure regulator designed for applications that require high performance and accurate process control back pressures and relief pressures, but where space may be limited or you wish to reduce the overall size of your panel or equipment.

Operating Principles
The Model 30BP Regulator uses the force balance principle to open the Relief Valve and vent system pressure when the set point 
is exceeded.

Downstream pressure is transmitted through the Aspirator Tube to the bottom of the Diaphragm Assembly. When you adjust the range screw for a specific set point, the Range Spring compresses and exerts a force on the top of the Diaphragm Assembly. As long as the pressure acting on the bottom of the Diaphragm Assembly produces a force less than the spring force acting on the top of the Diaphragm Assembly, the Relief Valve remains closed. When system pressure increases, the force on the bottom of the Diaphragm Assembly increases until it reaches the set point. When system pressure increases beyond the set point, the assembly moves upward, lifting the Relief Valve from its seat and vents the downstream air. 

If downstream pressure decreases below the set point, the assembly moves downward closing the Relief Valve.

Features

Model 30BP Midget Precision Back Pressure Regulator Features

  • The Model 30BP is a high-capacity back pressure regulator that relieves excess system pressure to maintain a setpoint.
  • Combination of high capacity and compact size make the Model 30BP an excellent choice for a wide range of precision applications including: Precise Control of Paper Machinery Felt Guides, Supply of a Precise Repeatable Signal to a Pneumatic 
    Clutch or Control of Cylinder Pressure.
  • The Model 30BP is sensitive to 1/4" Water Column variation which permits use in precision processes.
  • Flow of up to 40 SCFM allows use in applications with high flow requirements.
  • A Separate Control Chamber and Aspirator Tube isolate the diaphragm from the main flow eliminating hunting and buzzing.

Specifications

Model 30BP Midget Precision Back Pressure Regulator Specifications

SpecificationDescription
Set Point Range2–100 psig, [0.15–7.0 BAR], (15–700 kPa)
System Pressure (Maximum)150 psig, [10.0 BAR], (1000 kPa)
Flow Capacity (SCFM)40 (68 m3/HR) @ 100 psig, [7.0 BAR], (700 kPa)
Sensitivity1/4” (0.63 cm) Water Column
Ambient Temperature-40°F to +200°F (-40°C to +93.3°C)
Materials of Construction
  • Body and Housing: Aluminum
  • Diaphragms: Nitrile on Dacron
  • Trim: Brass

Q & A

Q&A Section with Expand/Collapse Icons

Model 30BP Midget Precision Back Pressure Regulator Q & A:

+ What is the Model 30BP and what is it used for?
The Model 30BP is a compact precision back-pressure and relief pressure regulator that enables high-accuracy control of downstream/back pressures or relief pressures in applications where space is limited, such as control panels or equipment enclosures. 
It is designed for precision applications such as paper-machinery felt-guide pressure, pneumatic clutch supply, or cylinder pressure control.
+What set-point pressure ranges does the Model 30BP cover?
The Model 30BP offers five standard set-point pressure ranges, from as low as 0-2 psi (≈0-0.15 bar, 0-15 kPa) up to 2-100 psi (≈0.1-7 bar, 15-700 kPa).
+ What is the flow capacity and accuracy/sensitivity of the unit?
The regulator is capable of handling a flow capacity up to 40 SCFM, making it responsive even in precision relief/back-pressure service. 
Its control sensitivity is down to ?″ water column (≈0.0069 bar or ~0.1 psi) or better, making it suitable for high precision process applications.
+What are the key design features that enable its precision control performance?
Key design features include a balanced relief valve that maintains consistent set point even when system pressures change, a separate control chamber that isolates the diaphragm from the main flow to eliminate hunting or buzzing, and an aspirator tube that compensates for pressure drop under flow conditions by isolating the diaphragm from the main flow stream.
+In what applications is the Model 30BP ideally used?
The Model 30BP is ideal for applications requiring compact size and precision back-pressure or relief control. Examples include controlling felt-guide pressure in paper machines, supplying a repeatable signal to a pneumatic clutch, or maintaining cylinder pressure in automated equipment.

 

Downloads

Download Rotork Fairchild Model 30BP Midget Precision Back Pressure Regulator Datasheet

Contact us at (855) 737-4714 to learn more or fill out our online form.

 
You were tireless in your support and it will not be forgotten!
 
When we needed technical assistance and application support, Valin was there for us. Their knowledgeable engineers saved us an invaluable amount of time, helping us get up and running quickly. We are very happy with their services.