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Bare Stem Wafer Type DI Disc with Spraying Nylon Concentric Butterfly Valve

The edge of the valve plate is processed into a spherical surface, and after polishing, the entire surface of the valve plate is covered with nylon. Nylon meets the hygiene standards for pipelines. Nylon coating has been widely used in water supply pipelines, beverages, food, and pharmaceutical engineering. Nylon coating can prevent fungal growth while also being corrosion-resistant. It can withstand 2000 hours of salt spray test and 10 years of seawater immersion test, while also being resistant to UV radiation and impact, and has a low friction coefficient.

Structural Features

  • Bare Stem Design: The bare stem design means the stem is exposed, allowing for direct actuator or manual handle attachment without the need for additional components. This design simplifies maintenance and operation.
  • Wafer Type Body: The wafer type body is compact and lightweight, designed to fit between two flanges in the piping system. This configuration reduces the valve’s footprint and makes installation easier.
  • Concentric Design: The disc and stem are aligned concentrically, meaning the disc rotates around its central axis. This design provides uniform sealing and reduces wear on the valve components.
  • DI Disc with Nylon Coating: The ductile iron disc is coated with nylon, enhancing its performance and longevity.

Advantages of Bare Stem

  • Ease of Actuation: The bare stem design allows for direct attachment of actuators or manual operators, making it straightforward to install and operate. This feature reduces installation complexity and maintenance requirements.
  • Cost-Effectiveness: By eliminating additional components typically required for stem protection, the bare stem design can be more cost-effective, offering a simpler and more economical solution.
  • Versatility: The bare stem design is compatible with various actuation methods, including electric, pneumatic, and manual, providing flexibility in different operational environments.

 

Benefits of Nylon Coating on DI Disc

  • Corrosion Resistance: Nylon coating provides excellent resistance to corrosion, protecting the ductile iron disc from the effects of harsh chemicals and environmental factors. This is crucial for maintaining valve integrity in corrosive environments.
  • Enhanced Durability: The nylon coating increases the wear resistance of the disc, extending its operational life by preventing abrasion and surface damage.
  • Smooth Operation: The smooth surface provided by the nylon coating reduces friction during operation, leading to more efficient and reliable valve performance.
  • Improved Sealing: Nylon coating enhances the sealing capability of the disc, ensuring a tighter and more reliable shut-off. This is particularly beneficial in applications requiring precise flow control.

Applications

  • Water Treatment: The corrosion-resistant and durable features of the nylon-coated DI disc make this valve ideal for water and wastewater treatment plants, where it can withstand aggressive chemicals and provide reliable performance.
  • Chemical Processing: In chemical processing industries, the valve’s resistance to corrosion and ability to handle aggressive fluids make it a valuable component.
  • Food and Beverage: The smooth operation and ease of cleaning associated with nylon coatings make these valves suitable for hygienic applications in the food and beverage industry.
  • HVAC Systems: The valve’s compact design and reliable performance are advantageous in heating, ventilation, and air conditioning systems, ensuring efficient fluid control and minimal maintenance.

Conclusion

In summary, the bare stem wafer type butterfly valve with a nylon-coated DI disc combines simplicity, durability, and efficiency. The bare stem design offers ease of operation and cost-effectiveness, while the nylon coating on the DI disc provides superior corrosion resistance, durability, and smooth operation. These features make it an ideal choice for various industrial applications, including water treatment, chemical processing, food and beverage production, and HVAC systems, where reliable and efficient flow control is essential.