Rotary Dosing Valve

The Rotary Dosing Valve, also known as a Rotary Valve, Ball-Type Rotary Valve, or Rotary Airlock Feeder, is a specialized device designed for the controlled, continuous, and dust-free discharge of bulk solids, such as powders and granules. As material falls by gravity from the upper hopper, it fills the spaces between the rotating vanes. As the rotor turns or reciprocates, the valve discharges the material at a steady, metered rate from the bottom outlet.
In pneumatic conveying systems, whether under positive or negative pressure, the rotary valve ensures a consistent feed into the conveying line while maintaining an effective airlock. This prevents air leakage or backflow, stabilizes pressure inside the pipeline, and keeps the bulk material transport process smooth and uninterrupted.
Featuring a robust structure, stable performance, and quick-release clamp design, this valve is easy to disassemble and clean, making it ideal for industries with high hygiene requirements such as food processing, pharmaceuticals, infant formula, sugar refining, and fine chemicals.

Key Benefits:

Continuous and metered discharge for precise material handling
Excellent sealing performance, ideal for airlock applications in pneumatic systems
Durable construction suitable for frequent-duty operations
Quick-assembly design for easy maintenance and hygienic compliance
Available in various material grades to handle corrosive or high-purity substances
Highly versatile, compatible with hoppers, screw conveyors, weighing systems, and automatic packaging lines

Parameter

Technical Specifications

Specifications:
Size range: 3.0" – 100"
Working pressure: -0.1 MPa ~ +0.5 MPa
Control air supply pressure: 0.4 – 0.8 MPa
Actuator options:
Standard: 0–180° actuator
Optional: 0–90° actuator, pneumatic rotary motor, servo motor
Working temperature: -20°C ~ +150°C (depending on sealing material)
Metal materials:
Contact parts: SS304, SS316L
Non-contact parts: SS304
Sealing material: Viton (standard, compliant with FDA 21 CFR 177.2660), EPDM, Silicone (optional)
Surface finish:
Ra < 0.4 μm (wetted surfaces)
Ra < 0.8 μm (non-wetted surfaces)
Airtight pressure: Non-airtight (standard configuration)
Sterilization method: SIP (Steam-in-Place)
Explosion-proof rating: ATEX II 2 GD T4
Connection standards:
DIN 11850 Series 2
ASME-BPE
ISO 1127 Series 1
Connection types: Clamped, welded