Rotolok manufactures rotary valves for the dust filtration field. Pressure differentials to 20 psi and temperatures to 750 F are available. Rotolock can make specials to handle pressures to 350 psi and temperatures of 2200 F.

Sunco offers standard and sanitary rotary valves and airlocks. Airocks feature a flange design in sizes of 1/2" to 60" in standard, blow-thru, and offset configurations. Sanitary rotary valves are available in a compact, modular design and are constructed of cast 316 stainless steel.

Bush & Wilton manufactures rotary airlock valves for heavy duty, drop-through, pneumatic, and metering applications. Valves are made of cast aluminum, iron, stainless steel, Monel, Hastelloy and Ni-hard.