Rotary Valve (Airlock Valve)

Rotary valves are efficient conveying systems used for the controlled discharge and feeding of powders, granules, and bulk materials. They are widely preferred in cement, mining, chemical, food, plastic, energy, and agricultural industries. With continuous flow, air-tight sealing, and low maintenance requirements, they optimize production processes in industrial facilities.

Designed for high-temperature and abrasive materials, rotary valves control material transfer by creating an airlock, ensuring efficient operation in pneumatic conveying systems, cyclone discharges, and silo outlets.

How Do Rotary Valves Work?

• Material enters: The material from the upper hopper fills the rotor chambers of the rotary valve.
• Controlled discharge: As the rotor turns, the material is transported to the outlet.
• Airlock function: The system’s air-tight design prevents pressure differences in pneumatic conveying systems.

These features enable precise dosing and transport of bulk materials, improving production efficiency.

Advantages of Rotary Valves

• Continuous and controlled material flow: Ensures stable and uniform feeding with a rotating rotor system.
• Air-tight sealing: Prevents air leaks in pneumatic conveying systems while maintaining pressure balance.
• Durable and long-lasting construction: Manufactured with cast iron, stainless steel, or specially coated materials to withstand abrasive substances.
• Low maintenance costs: Strong moving parts ensure long-term, trouble-free operation.
• Various capacity options: Available in different feeding capacities to meet operational needs.
• High-temperature resistance: Special models support safe and reliable operation in extreme temperatures.
• Easy system integration: Compatible with silos, cyclones, filters, and pneumatic conveying systems.

Applications of Rotary Valves

• Cement & mining: Ensures precise dosing of cement, lime, gypsum, coal, minerals, and other abrasive materials.
• Chemical & petrochemical: Used for the controlled transport of chemical powders, resins, and pigments.
• Food & agriculture: Facilitates the handling of flour, sugar, coffee, grains, starch, and animal feed in pneumatic transport and silo outlets.
• Plastic & polymer production: Controls the feeding of plastic granules, polymer raw materials, and chemical components.
• Energy & biomass plants: Supports the safe transfer of solid fuels, coal dust, and biomass waste.
• Environmental & recycling: Ideal for transporting recyclable materials in powder or granule form.

Types of Rotary Valves

• Standard Rotary Valve: Designed for general-purpose material feeding applications.
• Abrasion-resistant Rotary Valve: Features specially hardened internal coatings for abrasive materials.
• High-temperature Rotary Valve: Withstands up to 500°C, commonly used in cement and metal industries.
• Pneumatic Rotary Valve: Functions as an airlock system, ensuring compatibility with pneumatic conveying.
• Hygienic Rotary Valve: Made of stainless steel, ideal for food and pharmaceutical industries.

Key Considerations When Choosing a Rotary Valve

• Material properties: The valve should be selected based on the type of material being processed (powder, granule, or abrasive).
• Operating temperature & conditions: High-temperature or harsh environments require heat-resistant or coated models.
• Sealing & airlock performance: Pneumatic conveying systems need models with effective air-tight sealing.
• Material & coating selection: Choose from stainless steel, cast iron, or wear-resistant materials based on industrial needs.
• Feeding capacity: The valve must align with the required dosing and feeding levels of the production line.
• Connection type: Ensure compatibility with silos, cyclones, filters, or pneumatic installations.

Oresis Rotary Valve Solutions

At Oresis, we provide high-efficiency, low-maintenance, and long-lasting rotary valve solutions. Our advanced engineering ensures precise and continuous material feeding to optimize your production processes.