The SAMSON TROVIS SAFE 3730-6 is a state-of-the-art, electropneumatic valve positioner engineered for the highest demands of functional safety and precise control. Certified for use in Safety Instrumented Systems (SIS), this intelligent device is the enhanced version of the 3730-3, distinguished by its integrated sensors for continuous supply and signal air pressure monitoring. It provides unparalleled reliability for emergency shutdown (ESD) valves, on/off services, and critical throttling applications under challenging environmental conditions.
Its core function is to accurately translate a 4-20 mA control signal into precise pneumatic pressure to position control valves. Featuring a wear-free, non-contact travel sensor and the powerful EXPERTplus diagnostic suite—including Partial Stroke Test (PST) functionality—the 3730-6 transforms your valve into a smart, predictive maintenance asset. The robust design, available in die-cast aluminum or stainless steel housing with IP66/NEMA 4X protection, ensures long-term performance in harsh industrial settings.
Safety System Certified: Compliant with IEC 61508, this positioner is suitable for use in safety-related applications up to SIL 2 as a single device and SIL 3 in a redundant configuration, making it ideal for critical safety loops.
Advanced EXPERTplus Diagnostics: Integrated diagnostics enable predictive maintenance through features like Partial Stroke Testing (PST) and full stroke testing, allowing for valve health verification without process interruption.
Integrated Pressure Monitoring: As a key upgrade, built-in sensors continuously monitor both supply air and signal pressure, providing valuable data for performance optimization and diagnostics.
Universal Compatibility & Easy Mounting: Can be easily attached to all common single-acting and double-acting actuators (with a reversing amplifier). It supports direct SAMSON mounting, NAMUR interfaces per IEC 60534-6-1, and rotary actuators per VDI/VDE 3845.
Intuitive Operation & Flexible Setup: Features user-friendly, single-knob menu-driven operation and an LCD with a selectable reading direction. It offers four automatic initialization modes, including a unique “Substitution” mode for safe startup or replacement during ongoing plant operation.
The table below summarizes the core technical specifications of the SAMSON TROVIS SAFE 3730-6 valve positioner.
| Attribute Category | Specification |
|---|---|
| Model / Designation | TROVIS SAFE 3730-6 |
| Primary Application | Safety Instrumented Systems (SIS), Emergency Shutdown (ESD), On/Off and Throttling Service |
| Key Safety Feature | Integrated EXPERTplus diagnostics with Partial Stroke Test (PST) |
| Safety Certification | IEC 61508, suitable for SIL 2 / SIL 3 applications |
| Input Signal | 4 to 20 mA DC, two-wire system with reverse polarity protection |
| Communication Protocol | HART |
| Supply Air Pressure | 1.4 to 7.0 bar (20 to 105 psi) |
| Travel Range (Linear) | 3.6 to 200 mm (per IEC 60534-6-1); 3.6 to 30 mm (direct to Type 3277 actuator) |
| Rotation Angle (Rotary) | 24° to 100° opening angle |
| Linearity / Hysteresis | Deviation ≤ 1.0% / Hysteresis ≤ 0.3% |
| Steady-State Air Consumption | Approx. 110 normal liters per hour (ln/h), independent of supply pressure |
| Ambient Temperature Range | -20 °C to +80 °C (Standard); Option for -45 °C to +80 °C with metal cable gland |
| Housing / Protection | Die-cast aluminum or stainless steel / IP66 / NEMA 4X |
| Special Option | Available with a split-type valve position sensor for remote mounting up to 10 meters |
The SAMSON TROVIS SAFE 3730-6 is the ideal solution for maximizing safety and reliability in critical process control applications across various industries:
Oil & Gas and Petrochemicals: For safety shutdown functions and precise control in refining, production, and pipeline operations.
Chemical Processing: Critical control loops where reliability under challenging conditions is paramount.
Power Generation: Control of safety and throttling valves in boiler feedwater, turbine bypass, and other essential systems.
Pharmaceutical and Water Treatment: Automated control in processes requiring high integrity and safety compliance.
For detailed technical datasheets, configuration support with TROVIS-VIEW software, or to discuss your specific safety application requirements, please contact our sales team.
If you have any questions about the specifications or the suitability of the SAMSON TROVIS SAFE 3730-6 for your application, please contact the Kateteco sales team for expert support.
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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.
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