Type 1001 IP and EP Transducers

Type 1001 IP and EP Transducers from Marsh Bellofram are a patented family of electro-pneumatic instruments, used to reduce a supply pressure to a regulated output pressure which is directly proportional to a two-wire current or three-wire voltage input. This design incorporates closed loop sensing of the output pressure to achieve excellent accuracy and vibration stability. It also features a unique damping circuit which can be adjusted to prevent overshoot and actuator “hunting.” Model selection includes General Purpose (NEMA 1), Rainproof (NEMA 3R), and Watertight/Corrosion Resistant (NEMA 4X). NEMA 4X models are also explosion-proof and all models are intrinsically safe.

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Features:

  • 0.1% Accuracy Typical
  • Closed-loop Pressure Feedback Control Minimizes Effects of Vibration, Temperature, Supply Pressure and Mounting Angle
  • Built-in Volume Booster Provides Flows up to 12 SCFM
  • Easy Access Zero and Span Adjustment
  • Damping Pot Prevents Overshoot and “Hunting”
  • Low Air Consumption
  • Mounts at Any Angle (NEMA 3R Limited)
  • Compact and Lightweight
  • Virtually No Sensitivity to Supply Pressure Changes
  • Removable Orifice for Easy Maintenance

Applications:

  • Valve Actuators
  • Louver and Damper Actuators
  • Valve Positioners
  • Relays
  • Clutches and Brakes
  • Controllers
  • Air Cylinders
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