Airlock: Dairy Standard Rotary Valves

The DCSR Version 2.0 range combines a cleanable rotor arrangement with drop-through and blow-through configurations for dry powders, granules and pellets.

What the DCSR V2T and V2TE video shows

Airlock presents its DCSR Version 2.0 rotary valves in 2T and 2TE forms for feeding, metering and pneumatic conveying duties.

The product sequence highlights an end cover and rotor that can be detached for access to the product-contact area. That feature is directly relevant to dairy powder service, where residue around rotor ends, pockets and seals can extend cleaning time and create a cross-contamination risk between products.

Drop-through and blow-through arrangements

Drop-through duty: Product enters from above, fills the rotor pockets and falls through the lower outlet as the rotor turns. The valve can meter material from a hopper or provide a controlled solids feed into downstream equipment.

Blow-through duty: Conveying air passes through the lower part of the valve and clears product from the rotor pockets into a pneumatic line. Airlock’s current product pages list enlarged-round-inlet DCSR Version 2T and 2TE variants in both drop-through and blow-through families.

The two arrangements aren't interchangeable details. A blow-through valve couples pocket discharge to conveying-air velocity and pressure, while a drop-through valve relies more directly on gravity below the rotor.

Why detachable access matters in dairy service

Removing the rotor and end cover opens areas that are difficult to inspect through the inlet alone. Engineers can check product buildup, rotor-tip condition, seal faces and the clearance surfaces that separate the rotor from the housing.

Quick access doesn't by itself define a validated cleaning process. The selected valve still needs suitable product-contact materials, seals, surface finish and a cleaning method that matches the dairy plant’s hygiene plan.

Engineering considerations for selection

Capacity depends on rotor displacement, speed, pocket filling and the bulk density of the actual powder. Cohesive dairy powders may fill pockets unevenly, while granules can be damaged where particles meet the rotor tip.

Pressure differential also matters. Gas leakage through the running clearances can disturb material above the inlet or reduce pneumatic conveying performance below it. A useful specification therefore defines product properties, feed rate, pressure and temperature on both sides, acceptable particle damage, cleaning frequency and the required dismantling space.