Model 4000ABP Pneumatic Precision Back Pressure Regulator is a no bleed design regulator that precisely controls system back pressure. With its high flow capacity, the M4000ABP provides fast response and precision control under varying conditions.
Operating Principles
The Model 4000ABP Regulator uses the force balance principle to open the Relief Valve and vent system pressure when the set point is exceeded.
Upstream 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 4000ABP Back Pressure Regulator Features
- Four set point pressure ranges from 0.5-10 psi, 0.03-0.7 BAR, 3-70 kPa up to 2-150 psi, 0.1-10 BAR, 15-1000 kPa
- Control sensitivity of 1/2" water column allows for use in precision applications
- High flow capacity - responsive performance for precision back pressure or relief applications
- Large relief valve - high exhaust flow
- Aspirator tube compensates for any pressure build up under flow conditions
- Separate control chamber isolates the diaphragm from the main flow and eliminates hunting and buzzing
- Unit construction allows you to service the model 4000ABP without removing it from the line
Specifications
Model 4000ABP Back Pressure Regulator Specifications
| Specification | Details |
|---|---|
| Maximum Inlet Pressure (Psig) | 250 psig [17 BAR], (1700 kPa) |
| Flow Capacity | 150 SCFM (255 m3/Hr) at 90 psig [6 BAR], (600 kPa) setpoint |
| Sensitivity | 1/2” (1.27 cm) Water Column |
| Ambient Temperature | -40°F to +200°F (-40°C to +93°C) |
| Hazardous Locations | Zones 1 and 2 for gas atmospheres (Groups IIA and IIB); Zones 21 and 22 for dust atmospheres |
| Materials of Construction |
|
Q & A
Model 4000ABP Back Pressure Regulator Q & A
Downloads
Download Rotork Fairchild Model 4000ABP Back Pressure Regulator Datasheet
Contact us at (855) 737-4714 to learn more or fill out our online form.