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Model 81 Multi-Stage Precision Pressure Regulator
Brand: Fairchild Industrial ProductsThe Rotork Fairchild Model 81 is a high flow two-stage precision pressure regulator designed for applications that require high performance, low droop and accurate process control.
The Model 81 combines a pilot control system with a basic force balance system to provide accurate output pressure regulation for both highly sensitive instrumentation and control circuits and in equipment requiring high flow with precise control.
The Fairchild Model 81 features control sensitivity of less than 0.1" water column, very low consumption and high accuracy to deliver consistent and reliable precision accuracy to maintain your desired set point regardless of supply pressure changes or conditions.
The Fairchild Model 81 pneumatic regulator will handle a 250 psi,17 BAR maximum supply pressure and offers five (5) output pressure ranges from 0-20 psi, 0-1.5 BAR, 0-150 kPa up to 1-100 psi, 0.05-7 BAR, 7-700 kPa.
The Model 81 precision regulator has a flow capacity of 50 SCFM,136 m3/hr.
Features- Sensitivity of less than 0.1" water column
- Force balance and 2 stage pilot control
- High flow capacity
- Sapphire Orifice
- Low air consumption
- Available in 1/4" NPT port size
Specifications
Pressure Range
- 0-2 psig : 0-0.14 bar : 0-14 kPa
- 0-5 psig : 0-0.35 bar : 0-35 kPa
- 0-20 psig : 0-1.5 bar : 0-150 kPa
- 0.5-60 psig : 0.035-4 bar : 3.5-400 kPa
- 0.5-100 psig : 0.035-7 bar : 3.5-700 kPa
Pipe/Port Size
- 1/4"
Pipe/Port Thread Type
- NPT
- BSPT
Max. Supply Pressure
- 2 psig : 0.15 bar : 14 kPa
- 5 psig : 0.35 bar : 35 kPa
- 20 psig : 1.5 bar : 140 kPa
- 60 psig : 4.0 bar : 400 kPa
- 100 psig : 7.0 bar : 700 kPa
- 150 psig : 10 bar : 1000 kPa
Min. Supply Pressure
- 20 psig : 1.5 bar : 150 kPa
Max. Output Pressure
- 100 psig : 7.0 bar : 150 kPa
Effect of Supply Pressure Variation
- Less than 0.2 psig : 0.13 bar : 150 kPa for 100 psig : 7.0 bar : 700 kPa change.
Flow Capacity
- 50 scfm (85 m³/hr) @ 100 psig : 7.0 bar : 700 kPa supply; 20 psig : 1.5 bar : 150 kPa setpoint.
Exhaust Capacity
- 5.5 scfm (9.35 m³/hr) where downstream pressure 5 psig : 0.35 bar : 35 kPa above setpoint of 20 psig :1.5 bar : 150 kPa.
Sensitivity
- Less than 0.1” (.254 cm) W.C.
Ambient Temperature Limits
- -40° F to +200° F (-40° C to 93.3° C)
Tapped Exhaust Vent
- Tapped
Tamper Proof
- Tamper Proof
Air Consumption
- Less than 0.1 scfm (1.7 m³/hr)
Body & Housing Material
- Aluminum
Diaphragm Material
- Nitrile on Dacron
Orifice Material
- Sapphire
Trim Material
- Aluminum, Brass, Stainless Steel, Zinc-Plated Steel
Mounting Style
- Bonnet Mount
Diaphragm Material
- Nitrile on Dacron
Actuator Type
- Tamper-Proof
BSP Connection
- 1/4" BSPT Female
Vent
- Straight
- Tapped Exhaust
Sensitivity
- > 0.1 inH₂O (0.254 cm)
Supply Pressure - Maximum
- bar: 7
- kPa: 700
- psig: 100
Trim Material
- Aluminum
- Plated Steel
- Stainless Steel
Media
- Compressed Air
- Gas
Air Consumption
- Maximum
Exhaust Capacity - Relieving Units Only
- 5.5 scfm (9.4 m³/hour)
Output Pressure - Maximum
- bar: 7
- kPa: 150
- psig: 100
Mounting
- Bonnet Mounting
Ambient Temperature Range
- -40° to 93° C (-40° to 200° F)
NPT Connection
- 1/4" NPT Female
Pressure Range
- bar: 0 to 0.15
- bar: 0 to 0.35
- bar: 0 to 1.5
- bar: 0.035 to 4
- bar: 0.035 to 7
- kPa: 0 to 15
- kPa: 0 to 150
- kPa: 0 to 35
- kPa: 3.5 to 400
- kPa: 3.5 to 700
- psig: 0 to 2
- psig: 0 to 20
- psig: 0 to 5
- psig: 0.5 to 100
- psig: 0.5 to 60
Orifice Material
- Sapphire
Enclosure, Body Material
- Die Cast Aluminum
Exhaust Port
- Tapped Exhaust
Supply Pressure Effect
- > 0.2 psig (0.13 bar, 150 kPa) for 100 psig (7 bar, 700 kPa) Change