Key Features
• Superior Corrosion Resistance: Resistant to strong acids, alkalis, strong oxidizers, organic solvents, chlorine, etc., suitable for almost all corrosive conditions.
• Excellent Sealing: Internal leakage can reach ANSI Class IV/VI, zero risk of external leakage.
• Precise Regulation: Linear/equal percentage/quick-opening flow characteristics, with a positioner for precise control.
• Low Flow Resistance: S-shaped/straight-through flow path, high Cv value, low pressure drop loss.
• Temperature Range: -40℃～180℃ (PFA up to 260℃).
• Pressure: PN1.6～6.4MPa, DN20～350mm.
Working Principle
1. Control system outputs 4–20mA signal → Positioner converts to air pressure (0.02–0.1MPa).
2. Air pressure pushes the diaphragm → Valve stem moves the valve core → Changes the gap between the valve core and valve seat.
3. Continuous opening adjustment → Precise control of flow rate, pressure, temperature, and liquid level.
Applications
• Chemical Industry: Sulfuric acid, hydrochloric acid, nitric acid, caustic soda, liquid chlorine, organic solvents.
• Pharmaceutical/Food Industry: High-purity media, highly corrosive cleaning solutions.
• Environmental Protection: Wastewater, waste gas, acid-base neutralization systems.
• Metallurgy/Power Industry: Pickling, electroplating, desulfurization and denitrification.
