SAMSON Valve Positioners

SAMSON valve positioners are designed to enhance control accuracy and energy efficiency in industrial applications. Renowned for their reliability and precision, these devices facilitate the effective management of fluid flow by modulating valve positions based on signals received. They are integral in various sectors, ensuring optimal performance and operational stability. Browse our range of SAMSON compact and electro-pneumatic positioners below.

Key Features

Key features and benefits of SAMSON Valve Positioners
1

Key Features

SAMSON valve positioners offer exceptional control accuracy, enabling precise adjustments to valve positions. This ensures optimal flow rates and pressure management in complex industrial processes.
2

Key Features

These devices are engineered to optimize energy use, reducing operational costs and environmental impact. By ensuring valves operate only as needed, they prevent unnecessary energy expenditure.
3

Key Features

Built to withstand demanding industrial environments, SAMSON valve positioners are known for their long-term reliability and durability. They maintain consistent performance even under challenging conditions, minimising downtime and maintenance requirements.

3725 Type Compact Electro-Pneumatic Positioner

The Type 3725 electro-pneumatic positioner, designed for light industrial applications, incorporates SAMSON's proven technology. It offers straightforward self-calibration and auto-tuning, ensuring high control accuracy. Its compact, simple design is compatible with both linear and rotary actuators, facilitating installation without specific tools due to its spring compression electrical connections. The unit's display can rotate 180 degrees, and it features an easily navigable menu for programming.

Operation: Linear or rotary
Travel/Rotation: 50mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP66
Weight: Approx. 0.5 kg
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3730 Type Electro-Pneumatic Positioner

The Type 3730 electro-pneumatic positioner series, designed for general industrial use, includes models 3730-0 and 3730-1 for basic control, and from 3730-2 onwards, offers advanced diagnostics and full function parameterisation. It supports HART, Profibus, and Foundation Fieldbus protocols in higher models. With low air consumption and versatility in attaching to linear and rotary actuators, this positioner delivers top control performance and diagnostic capabilities, suitable for both control and On/Off applications.

Operation: Linear or Rotary
Travel: 200mm and Up
Degree of Protection: IP 66/NEMA 4X
Weights: 1.1 kg & 2 kg
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3730-0 Type Electro-Pneumatic Positioner

The Type 3730-0 electro-pneumatic positioner, part of the 3730 series, is designed for general industrial use, offering basic control for end users or processes. It supports both linear and rotary actuators, adaptable to Control and On/Off applications, with low air consumption and versatile display orientation. Advanced models offer full parameterisation and diagnostics, with communication protocols like HART, Profibus, and Foundation Fieldbus in higher variants.

Operation: Linear
Travel: 200mm
Degree of Protection: IP66
Weight: Approx. 1 kg
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3730-1 Type Electro-Pneumatic Positioner

The Type 3730-1 electro-pneumatic positioner is designed for general industrial use, offering basic control functions. It serves as a foundational model within the 3730 series, which progresses to include advanced parameterisation and diagnostics from the 3730-2 upwards, along with various communication protocols in higher models. This positioner is versatile, with low air consumption, compatible with both linear and rotary actuators, and supports Control and On/Off applications.

Operation: Linear or Rotary
Travel/Rotation: 200mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP 66/NEMA 4X
Weight: Approx. 1 kg · Special version in stainless steel: 2.2 kg
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3730-2 Type Electro Pneumatic Positioner

The Type 3730-2 electro-pneumatic positioner, part of the 3730 series, is designed for general industrial use. It offers full function parameterisation and advanced diagnostics, distinguishing itself from basic models like the 3730-0 and 3730-1. This model supports comprehensive control adjustments, including travel range and PID coefficients, alongside detailed diagnostics for optimal operation efficiency. It ensures low air consumption, fits both linear and rotary actuators, and suits Control and On/Off applications, with a rotatable display for ease of use.

Operation: Linear or Rotary
Travel/Rotation: 300mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP 66/NEMA 4X
Weight: Die-cast aluminium housing: approx. 1.0 kg & Stainless steel housing: approx. 2.2 kg
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3730-3 Type Electro-Pneumatic Positioner (HART)

The Type 3730-3 Electro-Pneumatic Positioner, part of the 3730 series, is designed for general industrial applications and introduces HART communication protocol. It offers full function parameterisation, advanced diagnostics, and superior control performance. With low air consumption and compatibility with both linear and rotary actuators, this unit is versatile for control and on/off applications, featuring a display that can rotate 180 degrees.

Operation: Linear or Rotary
Travel/Rotation: 300mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP 66/NEMA 4X
Weight: Die-cast aluminium housing: approx. 1.0 kg & Stainless steel housing: approx. 2.2 kg
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3730-4 Type Electro Pneumatic Positioner (Profibus)

The Type 3730-4 electro-pneumatic positioner, designed for general industrial applications, includes Profibus communication, enhancing its functionality with full parameterization and advanced diagnostics. This model, part of the versatile 3730 series, offers exceptional control and diagnostic capabilities, with features like status and data logging, and compatibility with both linear and rotary actuators. Its low air consumption and flexible mounting options underline its efficiency and adaptability.

Operation: Linear or Rotary
Travel/Rotation: 300mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP 66/NEMA 4X
Weight: Approx. 1.0 kg · Special version in stainless steel: 2.2 kg
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3730-5 Type Electro-Pneumatic Positioner (FF)

The Type 3730-5 Electro Pneumatic positioner, part of the 3730 series, is ideal for general industrial applications. It features Foundation Fieldbus communication, full function parameterisation, and advanced diagnostics. It supports various control and on/off applications, has low air consumption, and is adaptable to both linear and rotary actuators.

Operation: Linear or Rotary
Travel/Rotation: 300mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP 66/NEMA 4X
Weight: Approx. 1.0 kg · Special version in stainless steel: 2.2 kg
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3730-6 Type Electro-Pneumatic Positioner (HART)

The Type 3730-6 electro-pneumatic positioner, part of the 3730 series, is tailored for general industrial applications. It offers HART communication, advanced diagnostics, and full function parameterisation. Suitable for both linear and rotary actuators, it features low air consumption and versatile application in control and on/off tasks, with a rotatable display for ease of use.

Operation: Linear or Rotary
Travel/Rotation: 300mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: P 66/NEMA 4X
Weight: Approx. 1.0 kg · Stainless steel version: 2.2 kg
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3731-3 Type Explosion Proof Electro-Pneumatic Positioner (HART)

The Type 3731-3 Explosion Proof Electro-Pneumatic Positioner, featuring HART technology, is designed for industrial use where explosion-proof devices are requisite. It stands out for its comprehensive functions including easy attachment, one-knob operation, automatic start-up, and advanced valve diagnostics. This positioner offers exceptional control performance and diagnostics, with minimal air consumption. It is adaptable to both linear and rotary actuators and supports control and On/Off applications, ensuring versatile use in hazardous environments.

Operation: Linear or Rotary
Travel/Rotation: 200mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP 66/NEMA 4X
Weight: Approx. 2.5 kg
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3731-5 Type Explosion Proof Electro-Pneumatic Positioner (FF)

The Type 3731-5 Explosion Proof Electro-Pneumatic Positioner, part of the 3731 series, is designed for industrial applications requiring explosion-proof devices. This version supports Foundation Fieldbus communication, offering full function parameterisation and advanced diagnostics for optimal control and monitoring. It features low air consumption, compatibility with linear and rotary actuators, and a versatile enclosure for safe local configuration in hazardous environments.

Operation: Linear or Rotary
Travel/Rotation: 200mm or 100°
Display: Alphanumeric LCD
Features: Auto Calibration & Tuning
Degree of Protection: IP 66/NEMA 4X
Weight: Approx. 2.5 kg
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Frequently Asked Questions

A valve positioner is a device used to control the position of a valve's actuator based on a control signal. It ensures the valve reaches the desired degree of openness, enhancing control accuracy in fluid handling systems.

Valve positioners operate by receiving a control signal (typically 4-20 mA) from a control system and adjusting the pneumatic or hydraulic pressure to the valve actuator. This adjustment moves the valve to the correct position, matching the control signal's demand.

There are two main types: pneumatic valve positioners, which use air pressure for control, and electro-pneumatic valve positioners, which convert electrical signals into pneumatic signals to control the valve.

Valve positioners are crucial for precision control in industrial processes, ensuring stability, efficiency, and safety in systems that handle fluids, gases, or steam by maintaining the correct flow and pressure.

Yes, by enabling precise control over flow rates and minimizing process variability, valve positioners can significantly enhance process efficiency, reduce wastage, and save energy.

Selection depends on several factors including the type of valve, the control signal, the operating environment, and specific process requirements. Consulting with one of our valve experts is advised for optimal selection.

Regular maintenance includes checking for air leaks, ensuring the correct functioning of feedback mechanisms, calibrating the positioner as needed, and inspecting for any signs of wear or damage.

Yes, valve positioners are versatile and can be used with various types of valves, including ball valves, butterfly valves, and globe valves, among others, to control flow with high precision.

Valve positioners play a critical role in safety by accurately controlling the flow of potentially hazardous materials, preventing leaks, and ensuring that emergency shutdown systems operate correctly.

Smart valve positioners offer advanced features like digital communication, self-diagnosis, and remote configuration capabilities. They provide detailed diagnostics, enabling predictive maintenance and enhanced operational insights.

Electro-pneumatic valve positioners offer several advantages over their purely pneumatic counterparts, including higher precision in valve positioning due to the conversion of electrical signals to pneumatic control. This allows for easier integration with modern digital control systems, improved response times, and the ability to leverage advanced diagnostics and communication protocols for better process optimization and maintenance strategies.

Environmental conditions such as temperature extremes, humidity, vibration, and corrosive atmospheres can significantly impact the performance of valve positioners. High temperatures can affect the sensitivity and accuracy of pneumatic components, while extreme cold can cause condensation and freezing in pneumatic lines. Corrosive environments can degrade materials. Manufacturers often design valve positioners to withstand specific conditions, so selecting a positioner that matches the environmental challenges of the application is crucial for reliable performance.

FAQ

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SAMSON Valve Positioners