Key Characteristics
• Primary Function: Isolation and Moderate Throttling.
• Operation: Quarter-turn (90°).
• Flow Resistance: Low to Moderate (the disc remains inside the flow stream even when fully open, creating a small resistance).
• Size & Weight: Extremely compact, lightweight, and space-saving (wafer or lug design).
Pros & Cons
• Pros: Lightweight and compact, cost-effective (especially for large pipe diameters, e.g., $> 2"$ or 50 mm), fast actuation.
• Cons: Disc remains in the fluid path (can catch debris or cause slight turbulence/pressure drop), lower pressure and temperature limits compared to heavy-duty ball or globe valves (due to soft seating materials).
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