Double Sealing Quick Dismounting Stainless Steel Rotary Valve for Powder Conveying

The Doebritz External Bearing Drawer-Type Rotary Valve (Star Unloader) is an advanced material handling equipment. It functions as an ultra-reliable rotary airlock, achieving consistent feeding and absolute gas sealing within complex powder pneumatic conveying systems.

Fine dust and penetrative powders can easily destroy standard valve bearings. Built to survive these harsh, high-dust conditions, our specialized rotary valve is widely deployed in mineral processing lines, chemical powder handling, battery material conveying, cement plants, and heavy-duty dust collection systems.

Our star unloader incorporates specific features from our core design standards to solve fine dust handling challenges directly:

• Double Sealing (External Bearing Design): Ultra-fine powders can seep into mechanical gaps and destroy moving parts. This valve features an external bearing structure that completely moves the bearings outside the main housing. Combined with our advanced double sealing system, it strictly prevents dust infiltration, significantly extending the equipment's lifespan.
• Quick Dismounting (Drawer-Type): Powders often require frequent cleaning to prevent buildup. The innovative drawer-type (slide-out) structure allows operators to swiftly pull the internal rotor out along the guide rails for inspection and washing. This completely eliminates the need to unbolt the main pipeline, slashing maintenance downtime.
• Stainless Steel Build: Constructed entirely from premium stainless steel, the internal surfaces resist wear and ensure exceptional long-term structural integrity even under high-friction conveying conditions.

To guarantee stable and reliable operations under aggressive industrial stress, our equipment operates flawlessly within verified engineering parameters:

• Pressure Resistance: Safely maintains perfect sealing performance in pneumatic lines operating under pressures from -0.5 to 2 bar.
• Thermal Adaptability: Resists thermal deformation and functions securely across a wide working temperature range of -10 to 150 °C.
• Processing Capacity: Engineered for industrial-scale efficiency, delivering highly accurate volumetric throughput with a maximum capacity of up to 634 L/min.

Integrating this Doebritz rotary valve provides immediate, tangible value to your processing plant. It actively reduces material leakage, completely protects bearings from dust damage, and significantly lowers maintenance costs and downtime through its highly accessible drawer-type design.

A: By moving the bearings outside the main material flow area and utilizing a double sealing mechanism, it ensures that even highly penetrative dust cannot reach or destroy the rotating mechanical parts.

A: Absolutely. With precise internal clearances and excellent pressure isolation capabilities, it acts as a highly reliable airlock specifically suited for both vacuum and positive pressure conveying (-0.5 to 2 bar).

A: Maintenance is incredibly straightforward. The "Quick Dismounting" drawer-type mechanism allows operators to slide out the rotor in seconds to inspect clearances, wash away caked powder, and resume operations rapidly.