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Introduction to Control Valves
Control valves are core components in industrial automation systems, precisely regulating fluid flow, pressure, and temperature via PLC/DCS signals. Key advantages include:

1. Precision Control: Smart positioners (±0.5% accuracy) with PID algorithm integration;
2. Rapid Response: Pneumatic actuators (<1s action time), electric models with Modbus communication;
3. Corrosion Resistance: Materials like 316L stainless steel and Hastelloy for harsh media (pH 0-14);
4. Multi-Actuation: Pneumatic (0.4-0.7MPa), electric (24VDC/220VAC), or hydraulic drives;
5. Optimized Design: V-port ball valves (particle handling), triple-offset butterfly valves (zero leakage), and cage-style valves (noise reduction).

Industry Applications

1. Chemical Industry
   • Use Cases: Reactor pressure control (control valves), chlorine pipeline isolation (pneumatic ball valves);
   • Example: High-temperature valves (550°C/PN420) in PTA production.
2. Power Generation
   • Use Cases: Boiler feedwater regulation (cage valves), steam turbine bypass (angle valves);
   • Example: Multi-stage pressure-reducing valves for supercritical units (>30MPa differential).
3. Water Treatment
   • Use Cases: Aeration control (butterfly valves), RO system balancing (diaphragm valves);
   • Example: Titanium ball valves in desalination plants (chloride resistance).
4. New Energy
   • Use Cases: Hydrogen system safety shutoff (fire-safe valves), electrolyte dosing (micro-control valves);
   • Example: Ultra-clean valves with EPDM seals in polysilicon production.