Xiangjing (Shanghai) M&E Technology Co., Ltd
| Payment Terms | T/T |
| Supply Ability | 50PCS/Month |
| Delivery Time | 4~8 work week |
| Packaging Details | Based on demand |
| Maximum hysteresis | 0.3 % |
| Stroke range | 8-260 Mm |
| Input pressure | 1.4-6 Bar |
| Linearity | < 0.4 % Of The Travel Span |
| Pneumatic operation | Single Acting Double Acting |
| Housing Material | Aluminium Alloy |
| Brand Name | Foxboro |
| Model Number | SRD991 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 50PCS/Month |
| Delivery Time | 4~8 work week | Packaging Details | Based on demand |
| Maximum hysteresis | 0.3 % | Stroke range | 8-260 Mm |
| Input pressure | 1.4-6 Bar | Linearity | < 0.4 % Of The Travel Span |
| Pneumatic operation | Single Acting Double Acting | Housing Material | Aluminium Alloy |
| Brand Name | Foxboro | Model Number | SRD991 |
| Place of Origin | China | ||
| High Light | Foxboro SRD991 valve positioner ，intelligent pneumatic control valve ，original valve positioner supplier | ||
The Foxboro SRD991 Intelligent Valve Positioner is a smart digital controller designed for precise valve actuation and reliable performance in process automation systems.
It converts the 4-20 mA input signal (with optional HART® communication) into accurate pneumatic output pressure to control single- or double-acting actuators.
Engineered by Foxboro (by Schneider Electric), the SRD991 offers advanced diagnostics, quick commissioning, and robust communication for demanding industrial environments.
High Accuracy & Stability — Continuous digital control ensures tight valve positioning and minimal hysteresis.
Smart Communication — Compatible with HART®, PROFIBUS-PA, and FOUNDATION™ Fieldbus protocols.
Auto-calibration Function — The device performs self-tuning for actuator and valve characteristics, reducing setup time.
Built-in Diagnostics — Monitors valve friction, air supply, and stem performance to predict maintenance needs.
Rugged Design — IP66/NEMA 4X aluminum housing suitable for harsh process environments.
Local Configuration — On-device LCD with four-button interface for local setup and status display.
Explosion-Proof Options — Available for hazardous areas (Ex ia, Ex d, CSA, ATEX, IECEx).
Wide Application Range — Supports rotary and linear actuators with customizable feedback modules.
The SRD991 stands out in the intelligent positioner market due to its modular design, multi-protocol communication, and high-resolution sensors.
It supports easy integration into existing control systems and allows continuous online diagnostics — enabling predictive maintenance and higher process uptime.
| Parameter | Specification |
|---|---|
| Input Signal | 4-20 mA DC (HART® optional) |
| Air Supply Pressure | 1.4 – 6.0 bar (20 – 90 psi) |
| Output Pressure | 0 – 100 % of supply |
| Power Supply | Loop-powered (2-wire) |
| Operating Temp. | -40 °C to +80 °C |
| Ingress Protection | IP66 / NEMA 4X |
| Display | LCD with keypad |
| Certifications | ATEX, FM, CSA, IECEx, SIL2 (version-dependent) |
By continuously monitoring valve position and actuator pressure, the SRD991 dynamically adjusts output air to maintain accurate control.
The integrated diagnostics detect valve stiction or leakage early, reducing unscheduled downtime.
Its HART communication allows remote parameterization and online monitoring through standard asset-management tools.
At Dr. Industry Group, we provide:
Each SRD991 unit is carefully inspected and calibrated before delivery to ensure consistent performance.
Q1. What is the difference between SRD960 and SRD991?
The SRD991 is an advanced version with improved diagnostics, faster response, and wider protocol support (HART, PROFIBUS-PA, FOUNDATION Fieldbus).
Q2. Can SRD991 be used with double-acting actuators?
Yes, it supports both single- and double-acting pneumatic actuators through configurable output stages.
Q3. How is configuration done?
Via local keypad and LCD or remotely using FDT/DTM-based software such as FoxCom or HART asset management tools.
Q4. What materials are available for housing?
Aluminum alloy (standard), stainless steel (optional) for corrosive environments.
Q5. Does it support valve diagnostics?
Yes, it continuously analyzes valve friction, travel deviation, and response characteristics for predictive maintenance.
Dr. Industry Group Co., Ltd.
Shanghai – China
Website: www.shgongboshi.com
Email: edwardzhao@gbsxj.com
Phone: +86-15000725058
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2015
Total Annual:
30,000,000-50,000,000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
Xiangjing (Shanghai) - Leading Distributor of Pneumatic and Electric Control Valves Established in Shanghai, China, Xiangjing(Shanghai) Mechanical and Electrical Tech Co.,Ltd has been a trusted distributor of high-quality pneumatic and electric control valves for many years. With extensive indust... Xiangjing (Shanghai) - Leading Distributor of Pneumatic and Electric Control Valves Established in Shanghai, China, Xiangjing(Shanghai) Mechanical and Electrical Tech Co.,Ltd has been a trusted distributor of high-quality pneumatic and electric control valves for many years. With extensive indust...
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