Product introduction of the PTFE Wrapped Agitator
The core structure of our PTFE-wrapped agitator consists of a metal core (typically carbon steel or a combination of carbon steel and glass-lined) and a PTFE wrapping layer. PTFE is chemically inert and effectively resists media corrosion. Through a special wrapping process, the layer is tightly bonded to the metal core, ensuring it resists peeling or cracking during mixing. This structural design allows the agitator to maintain the mechanical strength of metal while also possessing the comprehensive corrosion resistance of PTFE.
Common Agitator Types & Applications
1. Anchor Agitator
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Design: A U-shaped or “anchor” profile that closely follows the contours of the vessel wall.
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Mechanism: Operates at low speeds (low shear) and generates primarily tangential (circular) flow.
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Best For:
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High Viscosity: Handling fluids from $10,000$ to over $100,000\text{ mPa}\cdot\text{s}$.
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Heat Transfer: The close clearance between the blade and the vessel wall “sweeps” the boundary layer, preventing product burning or scaling on the heating jacket area.
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2. Combined Agitator (Multi-Stage)
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Design: Features multiple types of impellers (e.g., an anchor at the bottom and pitched blades above) on a single shaft.
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Mechanism: Creates a complex mixed flow (combined axial and radial). The bottom part handles heavy solids or high viscosity, while the upper stages promote rapid bulk mixing.
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Best For:
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Complex Reactions: Processes where viscosity changes significantly during the reaction.
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Versatility: Ideal for multi-purpose pilot plants where different batches require different mixing dynamics.
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3. Propeller Agitator
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Design: High-speed blades with a helical pitch, similar to a boat propeller.
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Mechanism: Operates at high speeds to produce strong axial flow (pumping the liquid downward or upward).
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Best For:
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Low Viscosity Mixing: Ideal for fluids below $2,000\text{ mPa}\cdot\text{s}$.
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Solid-Liquid Suspension: The high downward thrust is excellent for keeping heavy particles from settling at the bottom.
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Rapid Homogenization: Quickly blending miscible liquids or dispersing powders.
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3. FAQ
Q: What should I consider when selecting a spiral wound PTFE agitator?
A: Confirm the operating temperature and pressure during the production process with the supplier to ensure the PTFE material is suitable.
