The SAMSON TROVIS 3731-5 is a state-of-the-art, microprocessor-controlled electro-pneumatic valve positioner, designed for demanding process control applications where reliability, precision, and intrinsic safety are paramount. As a smart field device, it receives control signals and provides precise pneumatic output to accurately position control valves.
Engineered for seamless integration into modern digital automation architectures, it features native FOUNDATION™ Fieldbus (FF) communication based on IEC 61158-2 protocol. Its flameproof “Ex d” enclosure makes it inherently safe for use in hazardous areas with flammable gases or dust, which is essential for industries like oil & gas and chemical processing.
A key intelligent feature is the integrated PID controller function block, which enables distributed control by processing control loops directly at the valve site. This reduces the load on the central control system and enhances response speed.
Foundation Fieldbus & Integrated PID Control: Enables high-performance digital communication and allows for distributed control loops directly at the valve, optimizing system architecture and responsiveness.
Flameproof Safety for Hazardous Areas: Certified with an Ex d rating, this positioner is built for reliable and safe operation in explosive atmospheres, meeting the stringent requirements of critical industries.
Advanced Diagnostics & EXPERTplus Software: Equipped with extensive self-diagnostic capabilities. The EXPERTplus suite facilitates predictive maintenance by monitoring valve performance, enabling features like partial stroke testing to ensure operational integrity.
Universal Mounting & Simple Setup: Offers flexible installation on linear actuators (per IEC 60534-6/NAMUR) or rotary actuators (per VDI/VDE 3845), including direct mounting on SAMSON interfaces. It features four automatic initialization modes for quick, user-friendly commissioning.
Robust, Non-Contact Design: Utilizes a calibrated, non-contact travel sensor that is immune to mechanical wear and tear, ensuring long-term accuracy and stability even under vibration.
The table below summarizes the core technical specifications of the SAMSON TROVIS 3731-5 valve positioner.
| Attribute | Specification |
|---|---|
| Model | TROVIS 3731-5 |
| Manufacturer | SAMSON |
| Communication Protocol | FOUNDATION™ Fieldbus (FF) |
| Explosion Protection | Flameproof, Ex d |
| Input Signal / Power | Digital via FF bus (bus-powered) |
| Supply Air Pressure | 1.4 – 7.0 bar |
| Travel Range (Linear) | 3.6 to 200 mm |
| Rotation Angle (Rotary) | 24° to 100° |
| Control Accuracy | High precision with hysteresis ≤ 0.3% |
| Steady-State Air Consumption | Very low, < 0.06 SCFM |
| Housing Material / Protection | Die-cast aluminum or stainless steel / IP66 |
| Ambient Temperature Range | -20°C to +80°C |
| Key Functions | Integrated PID controller, AO, DI blocks, Link Master; Tight-closing function |
| Configuration Software | SAMSON TROVIS-VIEW via SSP interface |
The SAMSON 3731-5 is engineered for critical control applications across a wide spectrum of industries where safety and precision are non-negotiable:
Oil & Gas (production, refining, pipelines)
Petrochemical and Chemical Processing plants
Power Generation facilities
Pharmaceutical and other process industries with hazardous areas
If you have any questions about the specifications or the suitability of the SAMSON TROVIS 3731-5 for your application, please contact the Kateteco sales team for expert support.
Imported brand The product styles are rich anddiverse Professiona quality and service
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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