High-Performance DN50-DN600 Class 150 Wafer Type Butterfly Valve

In-depth Analysis of Wafer Butterfly Valves: Applications & Core Pros/Cons

Application Fields

• Water Treatment & Supply/Drainage: Flow control in municipal water supply and wastewater treatment plants.
• HVAC: Water flow regulation in central air conditioning systems and heating networks.
• General Industrial Piping: On/off control for low-pressure media such as gas, water, and oil.
• Fire Protection Systems: Isolation control for fire protection pipe networks.

Advantages

• Compact Structure & Lightweight: Without integral flanges, the valve body is short and requires minimal installation space. It is over 30% lighter than flanged butterfly valves.
• Low Cost: Uses fewer materials and has a simpler manufacturing process, making it 20%-40% cheaper than flanged butterfly valves.
• Easy Installation: "Sandwiched" between pipeline flanges using long bolts, allowing for quick installation and removal, which simplifies maintenance.
• Low Fluid Resistance: When the disc is fully open, the flow path resembles a straight pipe, resulting in minimal pressure loss.

Disadvantages

• Relatively Weaker Sealing: Due to structural limitations, the sealing surface is susceptible to media erosion, and sealing performance may degrade over long-term use, making it inferior to ball valves or gate valves.
• Limited Pressure Capacity: Typically suitable for low-pressure systems below PN10-PN16 (Class 150); not applicable for high-pressure conditions.
• Requires Pipe Disassembly for Removal: For maintenance or replacement, all flange bolts on both sides of the pipeline must be removed, which can be cumbersome.
• Susceptible to Pipeline Stress: Thermal expansion, contraction, or vibration in the pipeline can cause valve body deformation, affecting the seal.

Selection Recommendations

• Low-Pressure & Ambient Temperature Scenarios: Wafer butterfly valves are the preferred choice due to their high cost-effectiveness.
• High-Pressure or Stringent Sealing Requirements: It is recommended to use flanged butterfly valves, ball valves, or gate valves.
• Space-Constrained Applications: Wafer butterfly valves are ideal for saving installation space.