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 airlocks are manufactured in either Cast Iron or Stainless Steel from 5” to 36” 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.