The SAMSON 3725 Series is an intelligent, compact electropneumatic valve positioner designed for precise and reliable control in a wide range of industrial applications. It translates a standard 4-20 mA input signal from your control system into an accurate pneumatic output, ensuring your valve reaches the exact required position.
Built with proven SAMSON technology, the 3725 is an economical and robust solution that combines ease of use with advanced digital functionality. Its design is particularly suited for light to medium-duty industrial applications and integrates seamlessly with various control valve designs.
Key Features & Benefits:
Advanced, Non-Contact Sensing: Utilizes a reliable, wear-free AMR (Anisotropic Magneto-Resistive) position sensor for long-term accuracy and stability, unaffected by environmental factors like vibration or steam hammering.
Simple, Intuitive Operation: Features an alphanumeric LCD display with a selectable reading direction for easy viewing in any mounting position, and an intuitive menu navigated via three capacitive keys.
Quick and Easy Setup: The automatic initialization and self-calibration function allows for fast commissioning with minimal effort. Most parameters are pre-set, requiring adjustment only for non-standard values.
Universal Compatibility: Can be attached to both linear actuators (per IEC 60534-6-1/NAMUR) and rotary actuators (per VDI/VDE 3845), as well as directly to SAMSON 3277 and 3372 type actuators, offering great installation flexibility.
Robust and Safe Design: Housed in a durable polyphthalamide (PPA) casing with IP66 protection, it is built for harsh industrial environments. It carries intrinsic safety certifications (e.g., ATEX, CSA) for use in hazardous areas.
| Attribute Category | Specification |
|---|---|
| General | Model: Type 3725 Electropneumatic Positioner Manufacturer/Brand: SAMSON Origin: Germany Housing Material: Polyphthalamide (PPA) Weight: Approx. 0.5 kg |
| Input & Control | Input Signal: 4 – 20 mA DC, two-wire system Load Impedance: Max. 315 Ω (at 20 mA) Direction of Action: Reversible Characteristics: 3 for globe valves, 9 for rotary valves (selectable) |
| Performance | Travel (Linear): 5 – 50 mm Opening Angle (Rotary): 24° – 100° Hysteresis: ≤ 0.3 % Sensitivity: ≤ 0.1 % Air Consumption: ≤ 100 ln/h (at specified conditions) |
| Output & Supply | Signal Pressure (Output): 0 bar up to supply pressure limit Max. Supply Air Pressure: 7 bar (105 psi) Air Connection: Rc1/4 or 1/4″ NPT |
| Environmental & Safety | Protection Rating: IP66 Ambient Temperature Influence: ≤ 0.15% / 10 K Vibration Resistance: ≤ 0.25% (up to 2000 Hz, 4 g) Explosion Protection: Intrinsic safety (e.g., ATEX, CSA, GOST) |
The SAMSON 3725 positioner is versatile and can be used across various sectors for precise throttling control. Common applications include:
Process control in chemical, petrochemical, and power generation plants.
Regulating fluids, steam, and gases in HVAC systems.
Integration with SAMSON control valve series such as 240, 250, V2001, 3214, and 3260.
For detailed technical datasheets, specific model selection (such as 3725-11 or 3725-1120000000), or pricing information, please do not hesitate to contact our sales team.
If you have any questions about the specifications or the suitability of the SAMSON 3725 positioner 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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