Overview
The Flowserve NT3000 A-38 I/P transducer is an active electro-pneumatic signal converter rated for explosion-proof service in hazardous locations. The Valtek NT 3000 Series Electro-Pneumatic Transducer is an active I/P Transducer that is used with a milliamp electrical control signal. It accepts 4-20 mA input from a distributed control system (DCS) and produces proportional 3-15 psi pneumatic output for actuator and control valve positioning.
Key Features
- Explosion-Proof Enclosure: Explosionproof Enclosure Rated Class I Division I Groups B-D, Class II Division I Groups E-G
- Intrinsically Safe Rating: Intrinsically Safe Rated Class I Division I Groups A-D, Class II Groups E-G
- Supply Pressure Range: Can handle supply pressures between 30 and 150 psi
- Internal Regulator: Self-controlling Internal Regulator Reduces pressure to 22 psi, eliminating need for external regulator
- Low Air Consumption: Steady state air consumption is .25 SCFM @ 60 psi supply maximum (.31 SCFM with I/P module)
- Corrosion Resistance: Internal working parts are constructed from 300 series stainless steel, anodized aluminum or Buna-N
Technical Specifications
- Input Signal: 4-20 mA
- Output Range: 3-15 psia
- Operating Voltage: 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)
- Transducer Impedance: 1330–270 ohms (load dependent)
- Supply Pressure Range: 30–150 psi
- Air Consumption: 0.31 SCFM max with I/P module @ 60 psi
- Output Pressure Control: Diaphragm flapper that is attracted by an electromagnet to a nozzle
- Pressure Sensing: Temperature-compensated piezoresistive pressure sensor mounted on a circuit board
- Certification Standards: EN 6100-4-2, EN 6100-4-3, EN 6100-4-4, EN 6100-4-5, EN 6100-4-6
- Housing Material: Epoxy powder-painted steel, continuously purged with instrument air
Typical Applications
The Flowserve NT3000 A-38 is used in:
- Petrochemical and refinery process control valve positioning
- Hazardous classified location (Class I Div 1, Class II Div 1) applications
- Diaphragm and cylinder actuator control
- Instrument air or nitrogen-supplied pneumatic systems
- Critical shutdown and safety valve applications requiring intrinsic safety certification
Compatibility & Replacements
Compatible With
- Valtek Linear or Valtek Rotary Actuators without modification
- Interchangeable with the XL Series or Beta Series Pneumatic Positioners
- 4-20 mA DCS output signals
- 30–150 psi instrument air or nitrogen supply
- NEMA Type 4X enclosure environments
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The NT3000 A-38 may be interchangeable with earlier Valtek transducer series depending on mounting configuration and certification requirements.
Works With
- Valtek positioner systems (pneumatic and electro-pneumatic)
- DCS platforms with 4-20 mA output capability
- FM, CSA, and ATEX explosion-proof certification frameworks
- Intrinsically safe certified control loops
- Pneumatic control valve actuators (diaphragm and cylinder types)
