Overview

The LKZ H(A/B) F46-10/16 series Teflon-lined pneumatic diaphragm single-seat control valve is a specialized process control terminal engineered for highly corrosive fluid services. Covering nominal diameters from DN15 to DN200 and pressure ratings from 0.6 to 2.5 MPa, this product line accommodates everything from small branch lines to large main pipelines. With flanged end connections, it ensures a robust and leak-tight interface with the piping system. Its core innovation lies in the complete F46 (perfluoroethylene-propylene) lining applied to all wetted internal surfaces, combined with a precision pneumatic diaphragm actuator. This design enables accurate linear flow regulation of strong acids, alkalis, and various organic solvents across a wide temperature range of -20 °C to 180 °C, making it an ideal component for automatic control systems in the chemical, petrochemical, metallurgical, pharmaceutical, and environmental protection industries.

  Product Image: Fluorine-Lined Pneumatic Diaphragm Single-Seated Control Valve (Model: LKZ H(A/B) F46-10/16)

Feature

Full F46 Lining for Extreme Corrosion Resistance: All metal surfaces of the body, seat, and plug that contact the process fluid are fully encapsulated with a high-quality F46 lining. Utilizing its outstanding chemical inertness, this structure completely isolates the metal substrate from aggressive media, withstanding prolonged exposure to virtually all strong acids, alkalis, and organic solvents, thereby eliminating the risk of body perforation and leakage.
Wide Size Range and Pressure Ratings: The series offers a full spectrum of diameters from DN15 to DN200 and pressure classes PN10/PN16 (0.6-2.5 MPa), providing flexible selection to match various pipe sizes and system pressure requirements. It is particularly effective in high-differential-pressure or high-flow corrosive applications.
Precise Pneumatic Diaphragm Control: Equipped with a high-performance multi-spring pneumatic diaphragm actuator featuring high sensitivity, fast response, and stable output force. When paired with a smart positioner, it enables proportional control via standard 4-20 mA signals with excellent accuracy. Optional flow characteristics (linear/equal percentage) are available to precisely match complex process control strategies.
Stable Operation Across a Wide Temperature Range: Through the synergistic thermodynamic design of the F46 lining and reinforced body structure, the valve maintains dimensional stability and superior sealing performance at media temperatures ranging from -20 °C to 180 °C. The lining remains free from softening or cracking, ensuring reliable continuous regulation of hot corrosive fluids.
Optional Body Materials for Versatility: Available in two base materials—cast steel and stainless steel. The cast steel body offers high strength and cost-effectiveness for standard corrosive services. The stainless steel body provides enhanced resistance to atmospheric and intergranular corrosion, specifically engineered for extreme environments such as marine climates or applications with high chloride concentrations.