The stainless steel wafer butterfly valve consists of four core components: the valve body, stem, disc (butterfly plate), and sealing ring. It employs a wafer-style connection, directly clamped between two pipe flanges using double-headed bolts.
Working Principle
On/Off Control
The disc rotates 0°–90° around the valve stem.
At 90°, the valve is fully open, enabling quick shut-off or flow initiation.
Flow Regulation
By adjusting the disc angle (e.g., 0°–30° for fine-tuning), flow rate can be precisely controlled.
The flow characteristic is nearly linear, with a regulation ratio of 50:1.
Sealing Design
Elastic Seal: Sealing rings are embedded around the valve body or disc (suitable for general applications).
Metal Seal: Uses a triple-offset structure (e.g., for high-temperature, high-pressure, or abrasive media).
This design ensures compactness, corrosion resistance, and efficient flow control, making it ideal for industries like food, pharmaceuticals, chemicals, and oil & gas.
Features of Wafer Butterfly Valves
Lightweight & Compact Design
Simple structure with minimal components, reducing size and weight (30% lighter than flanged valves).
Saves installation space, ideal for confined pipeline systems.
Wafer-style connection eliminates flange gaskets, cutting material costs and boosting installation efficiency by 50%.
Corrosion & Wear Resistance
304/316 stainless steel valve body resists chloride ions and acidic media, extending service life 3x longer than carbon steel valves.
Triple-offset metal seal (e.g., D373W-16P) optimizes sealing contact, enabling frictionless operation under high pressure (PN1.6–4.0 MPa) and 100,000+ cycles.
Rapid Operation & Low Torque
90° rotation for full open/close (as fast as 5 seconds for DN300 valves), 80% faster than gate valves.
Gear-type double-piston pneumatic actuator delivers high torque in a compact design, with optional top/bottom manual operation for effortless handling.
Bidirectional Sealing & Zero Leakage
Bidirectional sealing allows installation regardless of flow direction.
Zero leakage in gas tests, meeting strict petrochemical industry standards.
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