Core Structural Features
Spherical Valve Core Design: The core moving component is a hemispherical dome-shaped core, typically made of cast steel or alloy steel; the surface is hard-chrome plated to achieve a hardness of up to HRC65, significantly enhancing wear resistance.
Dynamic Inflatable Sealing System: Utilizes a specialized high-temperature and corrosion-resistant rubber seal ring. A clearance of 0.8–2 mm is maintained between the seal and the core when uninflated; upon closing, the seal inflates to form an annular band seal, requiring an inflation pressure 0.15 MPa higher than the conveying pressure.
Modular Split Structure: The valve body is typically made of carbon steel or stainless steel and features a fully enclosed pneumatic actuator. It supports a top-entry design, reducing the number of connecting bolts required for high-pressure applications and enhancing overall reliability.
Operational Performance Features
Friction-Free Operation: The valve core and seal ring operate without contact during the opening and closing processes, completely eliminating the friction and wear associated with traditional valves and significantly extending component lifespan.
Full-Bore Flow: When open, the valve core completely clears the flow path, leaving no obstructions; this prevents material jamming or erosion of the valve core.
Self-Compensating Seal: The seal ring automatically adapts to wear and embedded material particles, maintaining a tight seal even during long-term use.
Adaptability to Harsh Conditions: Standard models operate at temperatures up to 200°C, while water-cooled models handle up to 480°C; operating pressures reach up to 4.3 MPa, making them suitable for various powder conveying scenarios.
Long Service Life and Low Maintenance: Rated for 1 million operations before requiring inspection; the wear-prone seal ring can be replaced quickly without dismantling the valve core, resulting in very low maintenance costs.