The SAMSON TROVIS 3793 stands at the forefront of smart valve positioning technology, engineered to meet the most demanding requirements of large-volume pneumatic actuators and critical process control applications. As a core component of modern Industrial 4.0 environments, this electropneumatic positioner transforms your control valve into an intelligent asset with powerful diagnostic and communication capabilities.
The positioner is self-calibrating and automatically adapts to the connected valve and actuator, ensuring optimal performance from the start. Its modular design allows for simple installation or field exchange of pneumatic and optional functional modules, offering exceptional flexibility. Equipped with HART® communication and integrated EXPERTplus diagnostics, the TROVIS SAFE 3793 transforms your valve into an intelligent asset for predictive maintenance strategies.
Key Features & Benefits
Safety System Ready: Certified for use in Safety Instrumented Systems per IEC 61508 (suitable for SIL 2 as a single device, SIL 3 in redundant configuration), providing the assurance needed for critical safety applications.
Integrated Partial Stroke Test (PST): The defining feature of the “SAFE” model. It allows for automated, in-service testing of safety valves to verify their operational readiness, reducing the need for manual full-stroke tests and preventing dangerous undetected failures.
High Air Capacity & Robust Design: Delivers high pneumatic power for fast and reliable actuation of even large-volume valves. It is built to withstand challenging environmental conditions, including vibration, and is housed in a die-cast aluminum or stainless steel enclosure with IP66/NEMA 4X protection.
Universal Mounting & Non-Contact Sensing: Features simple attachment to all common linear and rotary actuators via SAMSON direct, NAMUR, or VDI/VDE standard connections. A wear-free, non-contact position sensing system guarantees long-term accuracy and reliability.
Intelligent Operation & Diagnostics: Features a user-friendly, menu-driven interface with a rotatable LCD for easy reading in any mounting position. The four initialization modes include a unique “Substitution” mode for safe replacement during ongoing plant operation. Integrated pressure and temperature sensors provide comprehensive health monitoring.
Technical Specifications
The table below summarizes the key technical attributes of the SAMSON TROVIS SAFE 3793 positioner.
| Attribute Category | Specification |
|---|---|
| Model / Designation | TROVIS SAFE 3793 |
| Primary Application | Safety Instrumented Systems (SIS) for on/off and ESD valves |
| Key Safety Feature | Integrated automated Partial Stroke Test (PST) |
| Safety Certification | Compliant with IEC 61508 (SIL 2/SIL 3 capable) |
| Communication Protocol | HART® |
| Input Signal | 4 to 20 mA DC, two-wire system |
| Supply Air Pressure Range | 1.4 to 7.0 bar (20 to 105 psi) |
| Air Consumption (Steady State) | Approx. 110 Normal liters per hour (ln/h) |
| Travel Range (Linear) | 3.6 to 200 mm |
| Rotation Angle (Rotary) | 24° to 100° |
| Actuator Compatibility | Single-acting and Double-acting pneumatic actuators |
| Ambient Temperature Range | -20 °C to +80 °C (Standard); Option for -45 °C to +80 °C |
| Housing Protection | IP66 / NEMA 4X |
| Configuration Software | TROVIS-VIEW (free software via SSP interface) |
Why Choose the TROVIS SAFE 3793?
Selecting the SAMSON TROVIS SAFE 3793 is an investment in process safety and operational intelligence. It provides a future-proof solution that not only ensures the reliable performance of your critical safety valves but also integrates seamlessly into modern asset management systems for predictive maintenance, reducing downtime and life-cycle costs.
For detailed technical datasheets, configuration support, or to discuss your specific safety application requirements, our experts are ready to assist you.
If you have any questions about the specifications or the suitability of the SAMSON TROVIS SAFE 3793 for your application, please contact the Kateteco sales team.








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KateTeco (Tianjin) Technology Co., Ltd. serves as an outstanding partner in the field of industrial fluid automation, specializing in the introduction and integration of high-end valves and instruments. We are committed to providing customers with safe, reliable, and intelligent system solutions. By leveraging global leading product resources and supported by systematic professional training and on-site technical assistance from Emerson’s experienced engineers, we ensure that customers can respond promptly and accurately to technical challenges.
With full lifecycle services covering installation, commissioning, operation, maintenance, and replacement, we deliver a true one-stop service system. This allows our customers to enjoy seamless, efficient, and high-quality assurance, supporting enterprises in achieving stable operation and continuous upgrades.


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