Rotork Fairchild Model 4100A is a no bleed low pressure precision pressure regulator designed for applications that require high performance and accurate process control at very low pressures down to 2 inches water column.
Operating Principles
When you adjust the Range Screw to a specific setpoint, the Range Spring exerts a downward force against the top of the Control Diaphragm. This downward force opens the Supply Valve. Output pressure flows through the Outlet Port and the Aspirator Tube
to the Control Chamber where it creates an upward force on the bottom of the Control Diaphragm.
When the setpoint is reached, the force of the Range Spring that acts on the top of the Control Diaphragm balances with the force of output pressure that acts on the bottom of the Control Diaphragm and closes the Supply Valve.
When the output pressure increases above the setpoint, the Diaphragm Assembly moves upward to close the Supply Valve and open the Exhaust Valve, and output pressure exhausts through the Vent on the side of the unit until it reaches the setpoint.
Features
Model 4100A Low Pressure Pneumatic Regulator Features
- Four output pressure ranges from 0-0.7 psi, 0-0.048 BAR, 0-4.8 kPa up to 0-5 psi, 0-0.35 BAR, 0-35 kPa
- Flow capacity of 30 SCFM, 51m3/hr
- Sensitivity of 0.05" WC - precision control in very low pressure applications
- Large relief valve provides high exhaust flows for responsive operation
- Soft valve seat minimizes air consumption
- Aspirator tube compensates for any pressure build up under flow conditions
Specifications
Model 4100A Low Pressure Pneumatic Regulator Specifications
| Specification | Details |
|---|---|
| Supply Pressure (Psig) | 20 psi to 150 psi max |
| Output Ranges | 0–0.7 psi (0–0.048 BAR); up to 0–5.0 psi (0–0.35 BAR) |
| Consumption | None detected |
| Sensitivity | As low as 0.05" Water Column |
| Supply Pressure Effect | None detected |
| Ambient Temperature | –40°F to +200°F (–40°C to +93°C) |
| Hazardous Locations | Acceptable for use in Zones 1 & 2 (gas atmospheres, Groups IIA & IIB); Zones 21 & 22 (dust atmospheres) |
| Materials of Construction |
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Q & A
Model 4100A Low Pressure Pneumatic Regulator Q & A
Downloads
Download Rotork Fairchild Model 4100A Low Pressure Pneumatic Regulator Datasheet
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