The prime function of a rotary airlock is to regulate the flow from one chamber to another while maintaining a good airlock condition. The product is mainly in dry powder or granular form. In the dust filtration field, a good airlock is essential on cyclone and bag filter applications in order that the manufacturers quoted high dust collection efficiencies can be maintained. Airlocks are also important in the pneumatic conveying industry, where product is regulated into a pressure or vacuum conveying line while minimising air leakage. With Rotolok there are no double standards, all our standard rotary valves and airlocks are precision machined for close tolerances and minimal eccentricities. Pressure differentials to 20psi and temperatures to 752°F are considered the norm and extreme pressures and temperatures can be accommodated with special designs. If your application requires such considerations contact the Rotolok Engineering team.
Our standard Rotary Airlocks are available with circular or square inlets from 2" up to 36".
Rotolok’s Heavy Duty Rotary Airlocks are manufactured in accordance with NFPA 69 Standards for use as deflagration isolation by flame quenching and material blocking. All valves are manufactured in either Cast Iron or Stainless Steel from 6” to 24” diameter. Airlocks come with 8 vane fabricated steel rotors with close tolerance to the housing bore and end covers with at least 2 vanes on each side of the valve housing in position of minimum clearance at all times. We offer special motors and switches as needed for the hazardous area environment. The majority of our NFPA Airlocks are available for quick shipment from our facility in North Carolina.
We also offer a complete range of Rotary Airlocks ATEX certified as suitable for use as an explosion barrier to a maximum of 10bar and for explosion isolation for St1 and St2 dusts. Baseefa certificate 11ATEX0127X accredits the range as Ex II D.
Rotolok Dairy Accepted Rotary Airlocks
Rotolok’s USDA Dairy Accepted line of Rotary Airlocks are designed for use in sanitary applications in the food, dairy, pharmaceutical and chemical industries where regular cleaning is required to prevent product contamination.
The product contact surfaces of the airlock are manufactured in 316 Stainless Steel and polished to a 150 grit finish, ensuring that there are no lodgement points allowing the product to flow smoothly. Furthermore, the airlock is equipped with a slide rail mechanism allowing for the quick and easy removal of the rotor from the airlock body. This addition substantially reduces the amount of downtime and the number of man hours required for the cleaning and maintenance of the rotor and airlock internals.
Our USDA certified Rotary Airlocks are available in sizes ranging from 6” up to 16”. For more details about the airlock and our certification, please contact us.
Download our brochure for our USDA Airlocks here.