Page 490 - Industrial Ancillaries 2020 Catalogue (Sterling)

12 Process Valves
Watson Smith 140 Failsafe Series Current to Pressure Electronic Convertor
170
1/4" NPT Thread
Speci cations
Medium: Compressed air min. ltered to 50 μm, oil-free, dry ( internal inbuilt air lter) Output Signal: 0.2 bar to 1 bar
Flow: Up to 300 Nl/min
Air Consumption: < 2.5 Nl/min at 50% signal
Instrument Accuracy: Mean < 0.1%
Mounting: Integral bracket allows for surface or 50 mm pipe mounting in any orientation Ambient Temperature: -40°C to +85°C. Consult our Sales Team for use below +2°C Linearity: Mean < 0.05% of span
Hysteresis: Mean < 0.05% of span
Temperature Effect: Typically less than 0.035% span/°C between -40°C to +85°C Supply Sensitivity: Less than 0.1% of span over full supply pressure range Calibration: Independent control of 0% and 100% set points
Adjustable by potentiometers up to 20% of output range
Unit is factory calibrated to within 1% of span
Fail-safe: Signal falls to below 15 mbar in < 2 s, when input signal fails.
Tight Shut-off Control: Potentiometer sets input signal failure at 3.5 mA Degree of Protection: IP66, NEMA 4X
Vibration Immunity: < 3% for vibration amplitude 4 mm 5 Hz to 15 Hz, 2g 15 Hz
to 150 Hz
Materials
Body: Aluminium and zinc die-casting Diaphragms: Nitrile
Black epoxy powder coating standard
Electrical Information
Electromagnetic Compatibility: Compliant with EC requirements EN 50081- 2:1994 (Emissions) and EN 50082-2:1995
(Immunity) Electrical Signal: 4 mA to 20mA (two wire)
Terminal voltage < 6.5 V @ 20 mA Minimum Operating Current: > 3.5 mA
Overload Protection: 100 mA maximum overload current
Insulation Resistance: > 100 MOhm at 850 V DC, electrical terminals to case Electrical Connections: 1/2" NPT or M20 via adaptor; internal block with capacity
up to 2.5 mm2 cable
Features
• Advanced electronic control
• ATEX certi ed
• Explosion proof and intrinsically safe
• Complete electronics modularity for ease of
maintenance
• Jack socket for on-site monitoring
• Fail-safe (unit pressure falls to zero on signal failure) • Field replaceable lter
Part No. Description Output Pressure bar Flow Nl/min Weight kg Price
EX140-01BJ4LE2 CENELEC (M20 via Adaptor) 0.2 - 1 300 2.07 CALL
490
EX140-01BJ4EE1 Triple Certi cation / Triple Agency 0.2 - 1 300 2.07 CALL
Process Valves