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Model 15 Positive Bias Relay

Brand: Fairchild Industrial Products
The Rotork Fairchild Model 15 Positive Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal plus a fixed bias.

This pneumatic relay provides an output pressure that represents the input signal pressure plus a preset bias. Mathematically Po = Ps + K where Po is output pressure, Ps is signal pressure and K is the spring constant.

This unit, available in several bias range configurations to meet a variety of output requirements, offers excellent sensitivity and high flow capacity in a small volume.

The Fairchild Model 15 Pneumatic Biasing Relay is well suited to a variety of control applications, including range shifting, and tension control, and pressure control from a remote location.
Features
  • Sensitive to 1/4" Water Column variation
  • Balanced Supply Valve
  • Aspirator Tube
  • Flow Capacity of 40 SCFM (68 m3/Hr)
  • Separate Control Chamber
  • Mounting Bracket available
  • Permits use in high precision applications
  • Minimizes the effects of supply pressure variation
  • Minimizes downstream pressure droop under flow conditions
  • Allows use in applications requiring high flow and/or fast response
  • Isolates the diaphragm from the main flow, eliminating hunting and buzzing
  • Quick and easy field installation
show more
The Rotork Fairchild Model 15 Positive Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal plus a fixed bias.

This pneumatic relay provides an output pressure that represents the input signal pressure plus a preset bias. Mathematically Po = Ps + K where Po is output pressure, Ps is signal pressure and K is the spring constant.

This unit, available in several bias range configurations to meet a variety of output requirements, offers excellent sensitivity and high flow capacity in a small volume.

The Fairchild Model 15 Pneumatic Biasing Relay is well suited to a variety of control applications, including range shifting, and tension control, and pressure control from a remote location.
Features
  • Sensitive to 1/4" Water Column variation
  • Balanced Supply Valve
  • Aspirator Tube
  • Flow Capacity of 40 SCFM (68 m3/Hr)
  • Separate Control Chamber
  • Mounting Bracket available
  • Permits use in high precision applications
  • Minimizes the effects of supply pressure variation
  • Minimizes downstream pressure droop under flow conditions
  • Allows use in applications requiring high flow and/or fast response
  • Isolates the diaphragm from the main flow, eliminating hunting and buzzing
  • Quick and easy field installation
12 models matching criteria
15422
FAIRCHILD Model 15 Positive Bias Relay, 1/4" NPT, 0-10 psi View More
  • Set Point Range: 0-10 psig, 0-0.7 bar, 0-70 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Ambient Temperature: -40°F to +200°F (-40°C to 93.3°C)
  • Pipe Size: 1/4" NPT
  • Pipe Thread: NPT
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Diaphragm: Buna A & Dacron
6 - 8 weeks
$631.85 USD
$15.56 Shipping
15423
FAIRCHILD Model 15 Positive Bias Relay, 3/8" NPT, 0-10 psi
6 - 8 weeks
$631.85 USD
$15.56 Shipping
15432
FAIRCHILD Model 15 Positive Bias Relay, 1/4" NPT, 0.5-30 psi View More
  • Set Point Range: 0.5-30 psig, 0.03-2 bar, 3-200 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Ambient Temperature: -40°F to +200°F (-40°C to 93.3°C)
  • Pipe Size: 1/4" NPT
  • Pipe Thread: NPT
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Diaphragm: Buna A & Dacron
6 - 8 weeks
$631.85 USD
$15.56 Shipping
15433
FAIRCHILD Model 15 Positive Bias Relay, 3/8" NPT, 0.5-30 psi View More
  • Set Point Range: 0.5-30 psig, 0.03-2 bar, 3-200 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Ambient Temperature: -40°F to +200°F (-40°C to 93.3°C)
  • Pipe Size: 3/8" NPT
  • Pipe Thread: NPT
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Diaphragm: Buna A & Dacron
6 - 8 weeks
$631.85 USD
$15.56 Shipping
15442
FAIRCHILD Model 15 Positive Bias Relay, 1/4" NPT, 1-60 psi View More
  • Set Point Range: 1-60 psig, 0.1-4 bar, 10-400 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Ambient Temperature: -40°F to +200°F (-40°C to 93.3°C)
  • Pipe Size: 1/4" NPT
  • Pipe Thread: NPT
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Diaphragm: Buna A & Dacron




6 - 8 weeks
$631.85 USD
$15.56 Shipping
15443
FAIRCHILD Model 15 Positive Bias Relay, 3/8" NPT, 1-60 psi View More
  • Set Point Range: 1-60 psig, 0.1-4 bar, 10-400 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Ambient Temperature: -40°F to +200°F (-40°C to 93.3°C)
  • Pipe Size: 3/8" NPT
  • Pipe Thread: NPT
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Diaphragm: Buna A & Dacron
6 - 8 weeks
$631.85 USD
$15.56 Shipping
15462
FAIRCHILD Model 15 Positive Relay, 2-150 psi, 1/4" NPT View More
  • Set Point Range: 2-150 psig, 0.15-10 bar, 15-1000 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Pipe Size: 1/4" NPT
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Nozzle: Buna A & Dacron
6 - 8 weeks
$631.85 USD
$15.56 Shipping
15463
FAIRCHILD Model 15 Positive Relay, 2-150 psi, 1/4" NPT
6 - 8 weeks
$631.85 USD
$15.56 Shipping
15422E
FAIRCHILD Model 15 Positive Bias Relay, 1/4" NPT, 0-10 psi, Tapped Exhaust View More
  • Set Point Range: 0-10 psig, 0-0.7 bar, 0-70 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Ambient Temperature: -40°F to +200°F (-40°C to 93.3°C)
  • Pipe Size: 1/4"
  • Pipe Thread: NPT
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Diaphragm: Buna A & Dacron
  • Options: Tapped Exhaust
6 - 8 weeks
$838.06 USD
$15.56 Shipping
15462E
FAIRCHILD Model 15 Positive Relay, 2-150 psi, 1/4" NPT, Tapped Exhaust View More
  • Set Point Range: 2-150 psig, 0.15-10 bar, 15-1000 kPa
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Ambient Temperature: -40°F to +200°F (-40°C to 93.3°C)
  • Pipe Size: 1/4" NPT
  • Options:
    • Tapped Exhaust
  • Materials of Construction:
    • Body & Housing: Aluminum Alloy
    • Trim: Stainless Steel, Brass, Zinc Plated Steel
    • Nozzle: Buna A & Dacron
6 - 8 weeks
$838.06 USD
$15.56 Shipping

Specifications

Ambient Temperature Range

  • -40° to 93° C (-40° to 200° F)

Enclosure, Body Material

  • Aluminum Alloy

Exhaust Capacity - Relieving Units Only

  • 40 scfm (68 m³/hour)

Flow Capacity

  • 150 scfm (255 m³/hour)

Mounting

  • Pipe or Panel

Pressure Range

  • bar: 0 to 0.7
  • bar: 0.03 to 2
  • bar: 0.1 to 4
  • bar: 0.15 to 10
  • kPa: 0 to 70
  • kPa: 10 to 400
  • kPa: 15 to 1,000
  • kPa: 3 to 200
  • psi: 0.5 to 30
  • psig: 1 to 60
  • psig: 2 to 150

Sensitivity

  • < 1/4" WC (0.64 cm)

Signal or Output Pressure - Maximum

  • bar: 10
  • kPa: 1,000
  • psig: 150

Supply Pressure - Maximum

  • bar: 17
  • kPa: 1,700
  • psig: 250

Supply Pressure Effect

  • psig: 0.1 (bar: 0.007, kPa: 0.7) for a psig: 100 (bar: 7, kPa: 700) Change in Supply Pressure