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D371F4 Semi-Lined Butterfly Valve PTFE Lined Wafer Type for Acid / Alkali Resistance
D371F4 Series Semi-PTFE Lined Wafer Butterfly Valve
The D371F4 Series Semi-PTFE Lined Wafer Butterfly Valve is a high-performance shut-off and regulating valve designed for corrosive media applications. Featuring a robust semi-lining of fluoropolymer (PTFE) on the disc, stem, and body, it offers excellent resistance to acids, alkalis, salts, and organic solvents. The wafer-type design allows for easy installation between pipeline flanges, making it a cost-effective solution for chemical, petrochemical, food, and water treatment industries.
Key Features
- Semi-PTFE Lining: The wetted parts (disc, stem, and body) are lined with a thick layer of PTFE, providing superior corrosion resistance and extending service life in aggressive environments.
- Wafer Type Connection: Compact and lightweight design, ideal for installation between two flanges, reducing space and weight compared to flanged valves.
- Manual Worm Gear Operation: Equipped with a durable worm gear operator for smooth and precise control of the valve opening and closing.
- Centerline Design: The disc rotates around a central axis, ensuring balanced flow and minimal torque requirements.
- Versatile Applications: Suitable for use in chemical processing, pharmaceuticals, food and beverage, power plants, and water treatment systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | D371F4 Series |
| Type | Wafer Butterfly Valve |
| Operation | Manual Worm Gear |
| Lining Material | PTFE (Polytetrafluoroethylene) |
| Body Material | Cast Iron / Ductile Iron (with PTFE lining) |
| Disc Material | Ductile Iron / Stainless Steel (with PTFE lining) |
| Stem Material | Stainless Steel (with PTFE coating) |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Temperature Range | -20°C to +180°C (depending on media) |
| End Connection | Wafer Type (for bolting between flanges) |
Applications
- Chemical Industry: Handling corrosive chemicals, acids, and alkalis.
- Petrochemical: Controlling flow in pipelines with aggressive media.
- Pharmaceuticals: Ensuring hygiene and corrosion resistance in process lines.
- Food & Beverage: Suitable for sanitary applications with non-corrosive media.
- Water Treatment: Managing flow in water and wastewater systems.
Installation & Maintenance
- Installation: Ensure the valve is installed in the correct orientation, with the flow direction matching the arrow on the body. Tighten the bolts evenly to avoid distortion.
- Maintenance: Regularly inspect the PTFE lining for signs of wear or damage. Lubricate the stem and gear operator as needed to ensure smooth operation.
- Why Choose Our D371F4 Valve?
Superior Corrosion Resistance: The thick PTFE lining protects against a wide range of corrosive media.
Cost-Effective: The wafer design reduces material and installation costs.
Reliable Performance: Designed for long-term use in demanding industrial environments.
For more information or to place an order, please contact our sales team. 
