1. Petroleum and Chemical Industry

• Scenario: Reactors, distillation columns, heat exchangers, and other equipment in refining and chemical production.

• Role:

• Precise control of reaction conditions: Adjust valve opening to regulate raw material flow, temperature, or pressure, ensuring optimal chemical reaction conditions.

• Safety interlock: Rapidly close valves in emergencies (e.g., overpressure or overtemperature) to prevent accident escalation.

• Leak prevention control: Ensure valve tightness in pipelines carrying toxic or flammable media, reducing leakage risks.

2. Power Industry

• Scenario: Boiler feedwater systems, steam regulation, steam turbine bypass systems, etc.

• Role:

• Stabilization of steam parameters: Regulate boiler steam outlet valves to maintain stable steam pressure and temperature, improving power generation efficiency.

• Rapid response to load changes: Adjust steam turbine inlet flow quickly during grid load fluctuations to maintain frequency stability.

• Equipment protection: Rapidly close valves in cases of steam turbine overspeed or abnormal boiler water levels to prevent equipment damage.

3. Pharmaceutical and Food Industry

• Scenario: Cleanrooms, sterile production lines, fermentation tanks, etc.

• Role:

• High-precision control: Regulate raw material or additive flow rates to ensure precise product formulation and compliance with quality standards.

• Hygiene requirements: Use corrosion-resistant and easy-to-clean positioners to avoid product contamination and meet GMP (Good Manufacturing Practice) standards.

• Sterile control: Enable remote valve operation in sterile environments to minimize manual intervention and reduce contamination risks.

4. Water Treatment and Environmental Protection Industry

• Scenario: Wastewater treatment plants, water treatment facilities, flue gas desulfurization and denitrification systems, etc.

• Role:

• Flow regulation: Control chemical dosing (e.g., flocculants, disinfectants) or sludge recirculation rates to optimize treatment efficiency.

• Liquid level control: Adjust inlet or outlet valves of water tanks to maintain stable liquid levels, preventing overflow or dry operation.

• Emission reduction: Precisely control ammonia water or limestone slurry flow in desulfurization and denitrification systems to reduce emissions.

5. Paper and Textile Industry

• Scenario: Pulp transportation, dyeing machines, digesters, etc.

• Role:

• Flow and pressure control: Regulate pulp or dye flow rates to ensure stable production processes and improve product quality.

• Temperature control: Adjust steam or hot water valves during cooking or dyeing processes to maintain constant temperatures.

6. Metallurgical and Mining Industry

• Scenario: Blast furnaces, converters, dust removal systems, etc.

• Role:

• Gas regulation: Control blast furnace gas or converter gas flow rates to optimize combustion efficiency and reduce energy consumption.

• Dust removal control: Adjust dust removal fan inlet valves to maintain stable system negative pressure and improve dust collection efficiency.

7. Building Automation and HVAC Systems

• Scenario: Central air conditioning, heating systems, ventilation ducts, etc.

• Role:

• Temperature and humidity control: Adjust water or air valve openings to maintain comfortable indoor environments.

• Energy-efficient operation: Dynamically adjust valve openings based on indoor-outdoor temperature differences or load changes to reduce energy consumption.

8. Special Operating Conditions

• High-temperature/high-pressure environments: Such as nuclear power plants and aerospace applications, requiring positioners capable of withstanding extreme conditions.

• Corrosive media: In chemical or marine environments, corrosion-resistant materials (e.g., stainless steel, Hastelloy) are used for positioners.

• Explosion-proof requirements: In flammable and explosive settings (e.g., oil fields, chemical plants), explosion-proof positioners ensure safety.