Fisher Masoneilan Samson Flowserve Neles Foxboro Valve Positioners
Product Overview
Valve positioners from Fisher, Masoneilan, Samson, Flowserve, Neles, and Foxboro represent the most widely used and trusted solutions for control valve automation in industrial process systems.
These valve positioners are designed to ensure precise valve stem positioning by converting control signals into accurate pneumatic output. Available in analog, electropneumatic, and smart digital configurations, they support modern automation requirements including diagnostics, remote configuration, and asset management.
These brands are commonly applied across oil and gas, chemical processing, power generation, refining, water treatment, and general industrial automation, where control accuracy, reliability, and long-term stability are critical.
Key Features
- High-precision valve positioning for pneumatic control valves
- Available in analog, electropneumatic, and digital smart versions
- Supports 4–20 mA input signals
- HART and digital communication available on smart models
- Advanced diagnostics for valve and actuator condition monitoring
- Compatible with linear and rotary control valves
- Supports single-acting and double-acting pneumatic actuators
- Robust housing for harsh industrial environments
- Easy integration with DCS, PLC, and SCADA systems
- Suitable for new installations and retrofit projects
Brand Overview
Fisher Valve Positioners
Fisher valve positioners such as DVC series provide advanced digital control, diagnostics, and reliable performance for demanding process applications.
Masoneilan Valve Positioners
Masoneilan SVI series smart valve positioners offer precise control, fast response, and strong diagnostics, widely used in critical control loops.
Samson Valve Positioners
Samson electropneumatic and digital valve positioners deliver stable performance and seamless integration with Samson control valves and actuators.
Flowserve Valve Positioners
Flowserve Logix series valve positioners are known for accuracy, modular design, and flexibility across a wide range of industrial valves.
Neles Valve Positioners
Neles smart valve controllers provide robust performance, predictive diagnostics, and advanced control for severe service applications.
Foxboro Valve Positioners
Foxboro valve positioners offer reliable and accurate positioning, designed for long-term operation in process automation systems.
Technical Specifications
- Positioner type
-
- Analog valve positioner
- Electropneumatic valve positioner
- Digital smart valve positioner
- Input signal
- 4–20 mA DC
- Communication
-
- HART
- Vendor-specific digital protocols depending on model
- Valve compatibility
-
- Linear control valves
- Rotary control valves
- Actuator compatibility
-
- Single-acting pneumatic actuators
- Double-acting pneumatic actuators
- Air supply
- Clean, dry instrument air
- Mounting
- NAMUR standard mounting
- Enclosure
- Industrial-grade housing for indoor and outdoor installation
- Hazardous area approvals
- ATEX, IECEx, FM, CSA depending on brand and model
Applications
- Control valve automation in oil and gas production and refining
- Chemical and petrochemical process control
- Steam and utility systems in power plants
- Water and wastewater treatment facilities
- Pipeline flow and pressure regulation
- General industrial automation and retrofit projects
Benefits
- Improves control valve accuracy and repeatability
- Enhances process stability and product quality
- Reduces maintenance through diagnostics and condition monitoring
- Supports digital plant and predictive maintenance strategies
- Flexible compatibility with multiple valve brands
- Long service life with proven industrial reliability
How Valve Positioners Work
Valve positioners receive a control signal from the control system and compare it with actual valve position feedback.
The internal control algorithm adjusts pneumatic output pressure to the actuator, ensuring the valve reaches and maintains the desired position.
Smart valve positioners continuously monitor valve performance and provide diagnostic data to improve reliability and reduce downtime.
Frequently Asked Questions
- Are these valve positioners interchangeable between brands
- Many models support NAMUR mounting, allowing use across different valve and actuator brands.
- Do all models support HART communication
- HART is available on most digital smart valve positioners, depending on the brand and series.
- Can these positioners be used in hazardous areas
- Yes, certified versions are available for hazardous locations.
- Are they suitable for retrofit projects
- Yes, valve positioners are commonly used to upgrade older analog systems.
- Do they support rotary and linear valves
- Yes, with appropriate mounting kits.
Related Products
- Pneumatic control valves
- Pneumatic valve actuators
- Digital valve controllers
- Control valve accessories
- Instrument air filter regulators
