Rotolok 20BSS Rotary Valve

Applications & Use Cases

• Dosing and feeding of dry bulk materials from hoppers or silos.
• Controlling product flow in pneumatic conveying systems.
• Acting as an airlock to maintain pressure differential between two zones.
• Discharging dust from cyclone separators or bag filters.
• Handling granular, powdered, or pelleted food ingredients.

Typical Specifications

Typical capacity

Throughput for this class of rotary valve typically ranges from a few litres per hour up to several cubic metres per hour, depending on rotor speed and pocket volume.

Power supply

Commonly driven by a geared motor, typically requiring a 400V, 3-phase electrical supply, though smaller units may use single-phase.

Construction material

The 'BSS' designation suggests stainless steel construction, which is standard for food-grade applications to ensure hygiene and corrosion resistance.

Rotor type

Units of this type commonly feature an open-pocket rotor, suitable for free-flowing powders and granules, or a closed-end rotor for fine powders.

Seal type

Typically includes shaft seals, such as gland packing or lip seals, to prevent product leakage and ingress of contaminants.

Operating temperature

Designed to operate within typical ambient industrial temperatures, with specific high-temperature versions available for specialist applications.

Pressure differential

Rotary valves are designed to maintain a pressure seal across a differential, commonly up to 0.2 bar for standard units, with higher pressure versions available.

Frequently Asked Questions

• What does 'BSS' in the model name typically signify?

  In Rotolok's naming convention, 'BSS' commonly indicates a 'Blow Through' valve with 'Stainless Steel' construction, suitable for pneumatic conveying lines.

• Is this valve suitable for abrasive products?

• How do I determine the correct size of rotary valve for my application?

• What maintenance is typically required for a rotary valve?

• Can this valve handle sticky or cohesive materials?

• What is the significance of the 'spare stainless roto shaft'?