Types and Complete Selection Guide of Glass-Lined Agitators for Stirred Reactors   In industrial stirred reactors, especially for corrosive, high-purity, or sanitary process scenarios in chemical, pharmaceutical, fine chemical, and food additive manufacturing, glass-lined agitators are the core critical components. They drive uniform mixing, accelerate chemical reaction rates, enhance interphase mass transfer, and optimize jacketed heat transfer efficiency.   Unlike standard stainless steel agitators, glass-lined agitators feature a corrosion-resistant, non-contaminating glass lining bonded to a steel substrate, making them ideal for handling strong acids, alkalis, and other aggressive media while avoiding product contamination. The correct selection of glass-lined agitators depends on a combination of medium properties, process requirements, reactor specifications, and industry compliance standards (such as ASME BPE, DIN 28136, and ISO 17726).   Main Types of Glass-Lined Agitators: Design, Performance & Applications   All glass-lined agitator designs below are engineered with smooth, rounded edges to ensure uniform glass lining application, prevent chipping or cracking of the enamel layer, and comply with glass-lined pressure vessel safety standards. Paddle Glass-Lined Agitators   Paddle glass-lined agitators feature a simple, robust structure with flat or folded (pitched) blades, the most cost-effective design for basic mixing processes.   Flow Characteristics: Flat-blade designs generate primarily tangential flow, optimized for uniform mixing when paired with reactor baffles; folded (45° pitched) blades deliver stronger axial flow for vertical medium circulation. Key Specifications: Standard impeller diameter ranges from 1/2 to 4/5 of the reactor inner diameter, with an operating speed of 20-80 r/min (compliant with glass-lined equipment speed limits to prevent enamel damage). Ideal Applications: Bulk fluid circulation, medium-to-high viscosity (1-100 Pa·s) corrosive media, gentle mixing processes such as dissolution, neutralization, and low-shear crystallization. Limitations: Limited axial mixing capacity for tall reactors; not suitable for high-shear dispersion or high-viscosity non-Newtonian fluids.   Propeller (Marine) Glass-Lined Agitators   Modeled after marine propeller designs, propeller glass-lined agitators are high-efficiency axial-flow impellers with 3 hydrodynamically optimized blades for low-stress, high-circulation operation.   Flow Characteristics: High tip speed (7-15 m/s) delivers strong axial flow and large-volume bulk circulation, with low shear force to protect the glass lining and fragile product particles. Key Specifications: Standard impeller diameter is 1/4 to 1/3 of the reactor inner diameter, with strict speed limits to avoid cavitation and enamel impact damage; best paired with draft tubes to eliminate dead zones. Ideal Applications: Low-viscosity (