Butterfly valves

Butterfly valves are commonly used fluid control valves, typically employed for regulating the flow of fluids. Their performance requirements generally include the following aspects:

1. Sealing Performance:Butterfly valves must effectively seal to prevent fluid leakage. This involves sealing between the valve seat and the valve disc, as well as the sealing of the valve stem. Good sealing performance ensures accuracy and safety in fluid control.

2. Flow Characteristics: Butterfly valves should possess good flow characteristics, meaning they can achieve stable flow control at different openings. This implies that the valve's flow coefficient should remain stable throughout its entire opening range.

3. Corrosion Resistance: Butterfly valves are often used for handling various fluids, including corrosive ones. Thus, valve materials and coatings should exhibit good corrosion resistance to ensure long-term stable operation.

4. Operating Torque:The operating torque of butterfly valves should be sufficiently low for operators to easily open or close the valve.This is especially important for manually operated valves.

5. Reliability and Durability: Butterfly valves should be designed with high reliability and durability, capable of stable operation under various conditions with minimal maintenance requirements.

6. Temperature and Pressure Range: The design and material selection of butterfly valves should consider the expected working temperature and pressure range to ensure the valve can operate safely and reliably under these conditions.

7. Fluid Characteristics:The design of butterfly valves should accommodate the characteristics of the handled fluid, including temperature, pressure, viscosity, and particle content, among others. Different fluid characteristics may require different valve designs and material selections.

These performance requirements are typically determined based on specific applications and industry standards to ensure that butterfly valves can meet the requirements of particular engineering projects.