Its core function is to receive a 4-20 mA control signal and translate it into a precise pneumatic output to accurately position a control valve. The positioner is self-calibrating and automatically adapts to the connected valve and actuator, simplifying commissioning. It is universally compatible, offering easy attachment to linear actuators per IEC 60534-6 (NAMUR) standards, rotary actuators per VDI/VDE 3845, and directly to SAMSON Type 3277 actuators.

A defining feature is its integrated EXPERTplus diagnostic software, which includes Partial Stroke Test (PST) functionality. This allows for proactive testing and health monitoring of safety valves without the need for a full process shutdown, ensuring operational integrity and supporting predictive maintenance strategies.

Key Features & Benefits

• Certified for Safety & Hazardous Areas: Flameproof Ex d enclosure and IEC 61508 / SIL certification make it ideal for critical safety loops and operation in explosive atmospheres.

• Advanced Predictive Diagnostics: The EXPERTplus suite with PST enables early fault detection, reduces unplanned downtime, and provides compressed status messages per NAMUR NE 107.

• Robust & Intelligent Design: Features a wear-free, non-contact travel sensor for long-term accuracy and a die-cast aluminum or stainless-steel housing with high protection rating. An integrated temperature sensor and operation hour counter support condition monitoring.

• Simple & Flexible Operation: User-friendly, single-knob, menu-driven operation is accessible even in hazardous areas. The LCD display offers a rotatable reading direction for easy viewing in any mounting position.

• Versatile Connectivity & Setup: Communicates via the HART® protocol for easy integration into control and asset management systems. It offers four automatic initialization modes, including a unique “Substitution” mode for safe start-up or replacement while the plant is running.

Technical Specifications

For more detailed technical data sheets, precise specifications, or to discuss how the TROVIS SAFE 3731-3 fits your specific application needs, please do not hesitate to contact our sales team.

If you have any questions about the product specifications or need assistance with model selection, please contact the Kateteco sales team for expert support.