The SAMSON TROVIS 3730-3 is a state-of-the-art, electropneumatic smart valve positioner designed for precise and reliable control of both linear and rotary pneumatic actuators. It functions as a critical link between your control system and the valve, constantly comparing the input signal to the valve’s actual position and issuing a precise pneumatic output to correct any deviation.
As a key part of SAMSON’s TROVIS 3730 series, this intelligent positioner is distinguished by its HART communication protocol, enabling seamless digital integration into modern control and asset management systems. It is engineered for versatility, offering simple attachment to virtually all common linear and rotary actuators, including those with NAMUR interfaces, making it a universal solution for upgrading and maintaining control loops.
Beyond precise positioning, the 3730-3 delivers advanced predictive maintenance capabilities with its integrated EXPERTplus diagnostics, helping to increase plant safety, availability, and efficiency by detecting potential valve issues before they cause downtime.
Intelligent HART Communication: Facilitates easy configuration, calibration, and remote diagnostics via the HART protocol, supporting integration with plant asset management systems.
Advanced Valve Diagnostics (EXPERTplus): Monitors valve performance to enable predictive maintenance and ensure operational reliability. Features include self-diagnostics with alarms conforming to NAMUR Recommendation NE 107.
Robust & Wear-Free Sensing: Equipped with a non-contact position sensing system that is immune to mechanical wear, dust, and moisture, ensuring long-term accuracy and stability.
Universal Compatibility & Easy Mounting: Can be easily attached to all common linear actuators (per IEC 60534-6 or VDI/VDE 3847) and rotary actuators (per VDI/VDE 3845), as well as directly to SAMSON Type 3277 actuators.
User-Friendly Operation: Features a plain-text LCD display that is easy to read in any mounting position and a simple one-knob, menu-driven interface for intuitive local operation.
Safe and Flexible Commissioning: Offers four different automatic initialization modes. The unique “Substitution” mode allows for safe start-up during ongoing plant operation without changing the valve position.
The table below summarizes the core technical attributes of the SAMSON TROVIS 3730-3 Smart Valve Positioner.
| Attribute | Specification |
|---|---|
| Manufacturer & Model | SAMSON AG • TROVIS 3730-3 |
| Device Type | Electropneumatic Positioner |
| Communication Protocol | HART |
| Input Signal | 4 to 20 mA DC, two-wire system |
| Travel Range (Linear) | 3.6 to 200 mm (up to 300 mm with specific mounts) |
| Rotation Angle (Rotary) | 24° to 100° |
| Supply Air Pressure | 1.4 to 7.0 bar (20 to 105 psi) |
| Air Consumption (Steady State) | Approx. 65 Nl/h (Normal liter per hour), independent of supply pressure |
| Characteristics | Linear, Equal percentage, Reverse equal percentage, Custom |
| Ambient Temperature Range | -20 °C to +80 °C (Standard); options available down to -40 °C |
| Housing / Protection | Die-cast aluminum or stainless steel • IP66 / NEMA 4X |
| Key Features | Non-contact sensor, Tight-closing function, Continuous zero monitoring, Integrated temperature sensor & operating hours counter |
The TROVIS 3730-3 is built for demanding process control applications across a wide range of industries, including:
Oil & Gas (production, refining, pipelines)
Petrochemical and Chemical Processing
Power Generation (thermal, nuclear)
Pharmaceutical and Biotechnology
Water and Wastewater Treatment
Its robust design and diagnostic intelligence make it the ideal choice for critical control loops where maximizing uptime, safety, and process efficiency are paramount.
Choosing the TROVIS 3730-3 means investing in more than just a positioner; it’s an investment in plant intelligence and reliability. Its combination of universal compatibility, wear-free technology, and powerful diagnostic tools translates to reduced maintenance costs, fewer unplanned shutdowns, and optimized control loop performance.
For detailed technical datasheets, configuration support, or specific pricing information for the SAMSON TROVIS 3730-3, please do not hesitate to contact us.
If you have any questions about the specifications or the suitability of this positioner for your application, please contact the Kateteco sales team.
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