RIECO Dual Tunnel Diverter Valve

The RIECO Dual Tunnel Diverter Valve is a high-precision rotary diverter engineered for dilute and dense-phase pneumatic conveying of powders and granules. Unlike flap or butterfly-style diverters—which introduce high wear, leakage paths, and material degradation—the valve uses a dual parallel tunnel plug that rotates to align the conveying path with the selected outlet, ensuring a fully unobstructed bore and minimal pressure drop.
The pressure-tight housing, stainless steel product-contact surfaces, and rapid rotary actuation make this valve suitable for continuous-duty conveying, high switching frequencies, abrasive materials, and industries with stringent hygiene or contamination control requirements.

RIECO Dual Tunnel Diverter Valve

Technical Model Matrix

Model Pipe Size (NB) Switching Angle Max. Op Pressure Construction
DTDV 80NB 80 mm 36.6° 3.5 bar(g) SS 304
DTDV 100NB 100 mm 35° 3.5 bar(g) SS 304
DTDV 125NB 125 mm 35.5° 3.5 bar(g) SS 304
DTDV 150NB 150 mm 35° 3.5 bar(g) SS 304
DTDV 200NB 200 mm 34.8° 3.5 bar(g) SS 304

Design and Operating Principle

The valve operates on a rotary plug mechanism fitted with two independent, full-bore tunnels. The design eliminates constrictions in the conveying path, ensuring uniform air-solids flow velocity.

Operating Sequence:

  1. Position A (Outlet–1 Aligned)
    • Tunnel-1 is aligned with the inlet and Outlet A.
    • Tunnel-2 remains isolated and sealed via static/dynamic elastomeric seals.
  2. Transition
    • A pneumatic actuator rotates the plug by approx. 35°.
    • Rotation is completed in <1 second under standard pressure.
  3. Position B (Outlet–2 Aligned)
    • Tunnel-2 aligns with the inlet and Outlet B.
    • Tunnel-1 is fully sealed off.

Dimension Chart

EMOD

Major Components & Engineering Construction

Component Engineering Description Material Design Advantage
Valve Housing Machined internal bore with precision SS insert for wear protection. Aluminium casting with SS liner High strength-to-weight ratio; pressure-tight up to 3.5 bar(g).
Pipe Assembly (Rotor) Dual-path plug with two independent conveying channels; precision-ground sealing surfaces. Stainless Steel 304 Ideal for abrasive, hygienic, and high-frequency switching applications.
Pneumatic Actuator Direct coupled to plug shaft; high torque for rapid switching. Pneumatic cylinder with linkage Ensures positive positioning and repeatable switching accuracy.
Sealing System Static and dynamic seals optimized for pressure containment and minimal leakage. Silicone / VITON Suitable for food, pharma, chemicals; low wear under cyclic duty.
Control & Feedback Package Solenoid valves, position sensors (proximity switch), junction box. Industrial-grade sensors PLC-ready, reduces control panel integration time.

Performance Features

Engineering Constraint DTD-P Feature Resulting Technical Benefit
Avoiding shear & attrition in fragile products Full-bore straight tunnels No turbulence zones; velocity profile remains uniform.
Preventing leakage under pressure Precision plug + elastomeric sealing Airtight sealing of non-active outlet; prevents reverse flow.
Reducing field maintenance Enclosed mechanism Minimal exposure of moving parts; extended MTBF.
Ensuring mechanical integrity under cyclic loads SS plug + reinforced housing Stable geometry and long operational life.

Applications

Food & Beverage
  • Material: Sugar, coffee beans, spices, flour blends
  • Use Case: Line selection from silo to multiple packing stations
  • Engineering Requirement: Hygienic surface finish, low shear
  • Compatibility: Meets cGMP design expectations
Pharmaceutical
  • Material: APIs, excipients, granules
  • Use Case: Post-blending routing to compression or coating lines
  • Key Requirement: No cross-contamination between batches
  • Compatibility: SS contact parts; seal options for cleanroom use
Plastics & Polymers
  • Material: PVC / PE / PP granules
  • Use Case: Routing to multiple extruders or day bins
  • Engineering Requirement: No pellet chipping; withstands cyclic switching
Chemical & Mineral Processing
  • Material: Cement, ash, alumina, pigments
  • Use Case: Diverting to alternate reactors or storage bins
  • Key Requirement: Abrasion resistance; pressure integrity
Product Details Application Note
Technical Model Matrix
Model Pipe Size (NB) Switching Angle Max. Op Pressure Construction
DTDV 80NB 80 mm 36.6° 3.5 bar(g) SS 304
DTDV 100NB 100 mm 35° 3.5 bar(g) SS 304
DTDV 125NB 125 mm 35.5° 3.5 bar(g) SS 304
DTDV 150NB 150 mm 35° 3.5 bar(g) SS 304
DTDV 200NB 200 mm 34.8° 3.5 bar(g) SS 304

Technical Performance Data
Parameter Specification
Conveying Modes Dilute & Dense Phase
Maximum Pressure 3.5 bar(g) Op. (6 bar Design.)
Operating Temperature (-)20 to (+) 80°C
Product Contact Material SS304
Housing Material Aluminium Casting + SS Insert
Leakage Class Air-tight
Area Rating Safe area Std
Switching Cycle Time 2-3 second
Max Hardness of Powder 2 MHO