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Model 2500A High Flow Reversing Relay
Brand: Fairchild Industrial ProductsThe Rotork Fairchild Model 2500A Bias Reversing Relay provides an outlet pressure that decreases in direct proportion to increases in input signal.
The input signal that acts on the Diaphragm Assembly opposes the Range Spring force and closes the Supply Valve to decrease output pressure, according to the formula (Po = K - Ps); where Po is output pressure, K is the spring constant, set by the screw, and Ps is signal pressure.
The M2500A pneumatic relay delivers this performance at a flow capacity of 150 SCFM (255 m3/HR), to provide fast response and tight control over your application.
Features- Control sensitivity of 1" water column
- Flow capacity of 150 SCFM (255 m3/HR)
- Soft Supply and Exhaust Valve seats
- Aspirator Tube design
- Separate Control Chamber
- Allows use in precision applications
- Provide fast and responsive system operation
- Minimizes air consumption
- Minimizes the effect of supply pressure variation
- Compensates downstream pressure droop under flow conditions
- Isolates the diaphragm from the main flow to eliminate hunting and buzzing
Specifications
Pressure Range
- 0.5-10 psig : 0.03-0.7 bar : 3-70 kPa
- 0.5-30 psig : 0.03-2 bar : 3-200 kPa
- 1-60 psig : 0.1-4 bar : 10-400 kPa
- 2-150 psig : 0.1-10 bar : 15-1000 kPa
Pipe/Port Size
- 3/8"
- 1/2"
- 3/4"
Pipe/Port Thread Type
- NPT
Max. Supply Pressure
- 250 psig : 17.0 bar : 1700 kPa
Flow Capacity
- 150 scfm (255 m³/hr) @ 100 psig : 7.0 bar : 700 kPa supply & 20 psig : 1.5 bar : 150 kPa setpoint.
Supply Pressure Effect
- Less than 0.1 psig : 0.007 bar : 0.7 kPa for a 100 psig : 7.0 bar : 700 kPa change in supply pressure.
Exhaust Capacity
- 40 scfm (65 m³/hr) where downstream pressure is 5 psig : 0.35 bar : 35 kPa above 20 psig : 1.5 bar : 150 kPa setpoint.
Max. Signal or Output Pressure
- 150 psig : 10 bar : 1000 kPa
Sensitivity
- 1” (2.50 cm) W.C.
Ambient Temperature Limits
- -40° F to +200° F (-40° C to 93.3° C)
Tapped Exhaust Vent
- Tapped
Body & Housing Material
- Aluminum
Diaphragm Material
- Nitrile on Dacron
Trim Material
- Brass, Zinc-Plated Steel
Enclosure, Body Material
- Aluminum
Exhaust Port
- Tapped Exhaust
Supply Pressure - Maximum
- bar: 17
- kPa: 1,700
- psig: 250
Sensitivity
- 1 inH₂O (2.54 cm)
Signal or Output Pressure - Maximum
- psig: 150 (kPa: 1,000, bar: 10)
Trim Material
- Brass
- Zinc-Plated Steel
Flow Capacity
- 150 scfm (255 m³/hour) at psig: 100 (kPa: 700, bar: 7) Supply & psig: 20 (kPa: 150, bar: 1.5) Set Point
Diaphragm Material
- Nitrile on Dacron
Supply Pressure Effect
- Less than psig: 0.1 (bar: 0.07, kPa: 0.7) Per psig: 100 (bar: 7, kPa: 700) Change
Exhaust Capacity - Relieving Units Only
- 40 scfm (65 m³/hour) where Downstream Pressure is psig: 5 (bar: 0.35, kPa: 35) Above psig: 20 (bar: 1.5, kPa: 150) Set Point
Ambient Temperature Range
- -40° to 93.3° C (-40° to 200° F)
NPT Connection
- 1/2" NPT Female
- 3/4" NPT Female
- 3/8" NPT Female
Pressure Range
- bar: 0 to 10
- kPa: 0 to 1,000
- psig: 0 to 150
