Page 491 - Industrial Ancillaries 2020 Catalogue (Sterling)

Process Valves 12
Watson Smith 422 Failfreeze Series Current to Pressure Electronic Convertor
170
1/4" NPT Thread
Speci cations
Medium: Compressed air, ltered to 5 μm, oil-free, dry
Output Signal: 0.2 bar to 1 bar minimum outlet pressure less than 140 mbar
Flow: Up to 300 Nl/min
Air Consumption: 0.2 l/min typical
Operating Pressure: At least 0.7 bar above maximum output pressure
Mounting: Operation in any attitude is possible without recalibration;
integral surface mounting bracket provided for vertical mounting
Ambient Temperature: -20°C to +70°C. Consult our Sales Team for use below +2°C Response Time: 6 seconds
Total Error: Max. error ± 0.5% of span (low pressure), 0.5% (high pressure)
(typical, independent error includes combined effect of non-linearity,
hysteresis, deadzone and repeatability)
Temperature Effect: Typically better than 1% span between -10°C and +60°C Supply Sensitivity: Negligible effect
Degree of Protection: IP65
Vibration Immunity: The unit possesses a high degree of immunity
Materials
Body: Aluminium and zinc diecasting Diaphragms: Nitrile
Black epoxy powder coating standard
Electrical Information
Electromagnetic Compatibility: Compliant and CE marked in accordance with the EC E.M.C. directive. Tested to
standards: BS EN50082-2: 1995 &
BS EN50081-2: 1994
Electrical Signal: 4 mA to 20mA (two wire); load presents 6 V (± 0.5 V)
constant voltage drop to the current source
Failure Mode: Signal held at previous value when input signal falls below
2 mA ± 0.5 mA; drift rate 0.02% in 30 seconds (mid-range) Electrical Connections: 30 mm square connector DIN 43650 provided,
mountable in four directions
Features
• Advanced electronic control • Failfreeze operation
(output pressure retained on power failure) • Vibration immune
• IP65 environment protection
• ATEX approved
Part No. Output Pressure bar
Flow Nl/min Weight kg Price
53AC2100 0.2- 1
300 0.8 CALL
53AC2400 0.2- 1 300 0.8 CALL
491
Process Valves