Foxboro SRD991 High Performance Digital Valve Positioner for Chinese Valve

High - Performance Valve Positioner - Foxboro SRD991

In the field of industrial automation, the Foxboro SRD991 valve positioner, with its advanced technology and reliable performance, stands out as a top - notch solution for achieving precise control of fluid flow in industrial processes.

Product Overview

Based on advanced microprocessor technology, the Foxboro SRD991 can rapidly process electrical input signals and translate them into accurate pneumatic outputs to drive the valve actuator. This enables industrial valves to precisely adjust their positions in response to complex working conditions, thereby effectively controlling fluid flow, pressure, and other critical parameters.

Product Features

- High - Precision Positioning: Utilizing sophisticated digital algorithms, it effectively eliminates hysteresis and oscillation. This allows it to meet the stringent requirements of various industrial scenarios for flow control with high precision.
- Intelligent Operation and Maintenance: It continuously monitors the status of valves and actuators in real - time, promptly triggers alarms when faults occur, and offers corresponding solutions. It can also automatically optimize parameters to ensure stable and reliable operation of the valves over time.
- Strong Compatibility: It supports multiple communication protocols such as HART and Fieldbus, enabling seamless integration with a variety of automation systems. This facilitates convenient remote monitoring and parameter adjustment, enhancing the flexibility and efficiency of system operation.
- Durable and Reliable Construction: Boasting a robust housing and protective design, it can adapt to harsh working environments, including high - temperature, high - pressure, and high - dust conditions. This helps to reduce maintenance costs and improve the overall reliability of the system.
- User - Friendly Operation: Parameter configuration, calibration, and fault diagnosis can be easily accomplished using handheld communicators or specialized software. This significantly improves the efficiency of commissioning and maintenance work.
- Energy - Saving and Efficient Performance: Thanks to optimized air circuits and intelligent control strategies, it effectively reduces compressed air consumption, aligning with the growing trend of green and energy - saving production in the industry.

1. Electrical Parameters
- Input Signal: It accepts a 4 - 20mA input signal, ensuring compatibility with various control systems like DCS and PLC. Some models also support communication protocols such as HART, Profibus - PA, and Foundation Fieldbus H1 for more complex control and monitoring functions.
- Working Voltage: Typically ranges from DC13 - 48V or DC9 - 32V, depending on the selected model and configuration, allowing it to adapt to different power supply conditions in industrial settings.

2. Pneumatic Parameters
- Supply Pressure: Usually ranges from 1.4 - 6bar, not exceeding the maximum pressure of the actuator, ensuring proper valve operation without equipment damage.
- Output Pressure: Adjustable based on the requirements of the valve and actuator to precisely control the valve opening.

3. Performance Parameters
- Positioning Accuracy: With a high positioning accuracy of up to ±0.1% - ±0.5%, it effectively enhances the precision and stability of the control system.
- Response Time: A quick response time of only 0.2 - 0.5 seconds allows it to rapidly respond to control signals and achieve precise valve positioning.
- Dead Band: Less than 0.5%, reducing unnecessary valve movements and improving control accuracy.

4. Mechanical Parameters
- Valve Stem Travel: Standard linear travel ranges from 8 - 260mm (0.3 - 10.2 inches), with special lever travel available for larger ranges. For rotary travel, it can reach up to 95°, making it compatible with various types of valves and actuators.
- Installation Method: It can be directly mounted on linear or rotary actuators, offering flexible and convenient installation. Remote installation is also supported in accordance with relevant standards.

5. Environmental Adaptability Parameters
- Operating Temperature: Generally ranges from - 40℃ - +80℃, allowing it to operate stably in various harsh environments.
- Protection Rating: With an IP66 or NEMA 4X rating, it provides excellent dust and water resistance, making it suitable for damp and dusty conditions.
- Explosion - Proof Rating: It meets ATEX, FM, CSA, INMETRO, NEPSI, CU TR, and other explosion - proof standards for intrinsic safety, making it suitable for hazardous areas such as in the chemical and petroleum industries.

6. Other Parameters
- Housing Material: Typically made of stainless steel or other durable materials, it offers good corrosion resistance for long - term use in harsh conditions.
- Display and Operation: Equipped with a multilingual graphical full - text LCD and LED display, it intuitively shows valve position and operating status information. On - site configuration and operation can be easily performed using the keys on the panel.

Application Fields

It finds extensive applications across numerous industries such as petrochemical, power generation, water treatment, metallurgy, and food & beverage. By precisely controlling key process parameters, it ensures stable and efficient production processes. This not only helps enhance product quality but also boosts the competitiveness of enterprises in the market.