Overview
The Flowserve NT3000 I/P transducer is an active electro-pneumatic converter that translates milliamp electrical signals into proportional pneumatic pressure outputs. This transducer converts 4–20mA input to 3–15psi output and is commonly used as a module within Valtek Beta or XL Series positioner assemblies for linear and rotary valve actuators across oil & gas, chemical processing, power generation, and industrial automation applications.
Key Features
- Signal Conversion: Converts 4-20 mA input signals to 3-15 psi pneumatic outputs with excellent linearity and repeatability
- Supply Pressure Range: Handles supply pressures between 30 and 150 psi
- NEMA Enclosure Rating: NEMA 4X / TYPE 4X for wash-down and corrosive environments
- Mounting Flexibility: Interchangeable with the XL Series or Beta Series Pneumatic Positioners and can be mounted on either Valtek Linear or Valtek Rotary Actuators without modification
- Voltage Operating Point: Flowserve recommends an operating voltage of 6.5 VDC (i.e. the DCS system should allow for at least 6.5 V loop load across the NT 3000 terminals)
- Field Calibration: Can be calibrated while mounted to the XL Series or Beta Positioners
Technical Specifications
- Input Signal: 4–20 mA DC
- Output Pressure: 3–15 psi (0.21–1.03 bar)
- Supply Pressure Range: 30–150 psi (2.1–10.3 bar)
- Operating Voltage: 6.5 VDC minimum loop load
- Voltage Drop: 5.7–6.1 V across transducer terminals
- Impedance: 1330–270 ohms
- Enclosure Rating: NEMA 4X / Type 4X
- Design: Diaphragm flapper with electromagnet, temperature-compensated piezoresistive pressure feedback
- Origin: Made in U.S.A.
- Series: Valtek NT3000 Electro-Pneumatic Transducer
Typical Applications
- Oil & Gas: Pipeline and actuator control
- Chemical Processing: Reactor valve positioning
- Power Generation: Steam valve automation
- Water Treatment: Flow control in treatment systems
- Pharmaceutical: Hygienic valve operation
- Valve positioner modules for proportional control loops
- Industrial process automation requiring analog-to-pneumatic conversion
Compatibility & Replacements
Compatible With
- Valtek Beta Series Positioners
- Valtek XL Series Positioners
- Valtek Linear Actuators
- Valtek Rotary Actuators
- DCS systems and PLC-based control loops (4-20mA output capable)
- Systems requiring 3-15psi pneumatic modulation
Replaces / Drop-In Replacement For
- NT3000 Series transducers (direct module replacement)
- NT3002 variant assemblies
- Legacy Valtek I/P transducer modules in Beta/XL positioner assemblies
Works With
- 4-20mA control signal outputs from DCS, PLC, or analog controllers
- Pneumatic supply systems (30–150 psi)
- Proportional valve control loops
- Industrial instrumentation cabinets with milliamp loop power
- Systems certified for NEMA 4X / Type 4X enclosures
