Rotolok is a global market leader in manufacturing and supplying process control valves and equipment for the powder and bulk handling industries.

Founded in 1973 in the UK, and headquarters in North Carolina, USA.  Continually affirmed as a market leader in a range of products applied to dry and bulk materials handling systems. Initially manufacturing rotary airlocks, now it has expanded to complementary areas of powder and bulk solids handling technology.

Rotolok has the most advanced computerized numerically controlled (CNC) manufacturing machines available. Their equipment ensures quality products, component interchangeability, and prompt deliveries.

Rotary Valves and Airlocks

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. A rotary airlock is also important in the pneumatic conveying industry, where the product is regulated into a pressure or vacuum conveying line while minimizing air leakage. With Rotolok there are no double standards, all our standard valves and airlocks are precision machined for close tolerances and minimal eccentricities.


Manufactures a full range of Flap, Plug and Weigh Diverters, which cover all applications in the pneumatic conveying industry to reroute powder, pellets or granules from one discharge to another.

Slide and Control Valves

Slide valves are simple but robustly designed to handle powders, pellets, and granules over a wide field of applications. They may be operated manually, or by pneumatic means or electric motors, and offer reliable, continuous service with the minimum of attention and maintenance.

Other Products

The company offers a range of products such as telescopic bulk loaders, backfill units and oddball rotary valves.

Rotolok products are available through Enviro Handling Solutions