The core selling points of the wafer butterfly valve (double eccentricity + soft seal)
Advantages in Structure and Installation
Double eccentric structure: The valve shaft is double-offset. When the butterfly plate is opened by approximately 20°, it detaches from the valve seat. This significantly reduces friction, requires low torque, and has a long service life.
Clamp-type connection: No built-in flange. Compact structure, light weight, saves space and quick installation.
Easy to install, dismantle and repair: The valve seat can be replaced independently without disassembling the butterfly plate or the valve shaft, resulting in low maintenance costs.
Sealing and Performance Highlights
Bidirectional zero leakage: Soft seal (EPDM/NBR/PTFE) + lip type/flexible seat, bubble grade seal
Dynamic sealing: The tighter the seal, the higher the pressure. It compensates for temperature and pressure changes.
Low flow resistance + Excellent regulation: Approximately equal percentage flow characteristic, dual function of cut-off and regulation
No jamming during opening and closing: Low friction, low torque, suitable for manual/turbine/pneumatic/electric applications
Appropriate material for the working conditions
Rich materials: Valve body WCB/304/316; Butterfly plate made of stainless steel; Valve seat available in multiple elastic materials for selection
Wide applicability: water, oil, gas, steam, weakly corrosive media; -30℃ ~ 180℃ (depending on sealing components)
High durability: Can withstand tens of thousands of opening and closing operations without any loss, suitable for frequent switching conditions.
Cost and Value for Money
Lightweight and cost-effective: Lightweight by 30%+ compared to flanged butterfly valves, reducing the load on the pipeline and lowering installation costs
Long lifespan + Easy maintenance: Reduces downtime and spare parts consumption, and has a low total cost throughout the entire life cycle.