Rotary Airlocks
Our quality valves will provide reliable service and long life.  An important key to rotary valve performance and long life is optimal valve selection based on your process requirements.  B&W has 50 years of experience selecting, designing and manufacturing rotary valves and more than 200 years foundry experience.  Our ability to design and produce custom designs is unmatched in the industry.  Whether your application is heavy duty, drop-through, pneumatic, metering or simply emptying a dust collector, we have the right valve for you.  Most valves are available in cast aluminum, iron, stainless steel, Monel, Hastelloy and Ni-hard and with a variety of metallic coatings. 
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Bush & Wilton's IF "U" Rotary Airlocks are very cost-effective valves designed for use under gravity, pressure and vacuum conditions.They are suitable for metering a wide range of dry solids, granular, pelleted and powdered type materials from the outlets of silos, hoppers, cyclones, mixers, weighers, etc.


MSRT (tapered bore rotary valves) are designed for use under gravity, pressure and vacuum conditions. They are suitable for metering a wide range of dry solids, granular, pelleted and powdered type materials from the outlets of silos, hopper, cyclones, mixers, weighers etc.


MSRP (parallel bore rotary valves) is designed so that the maximum number of blades remain in contact with body at one time without affecting throughput. Substantial throat opening at valve entry allows high pocket filling efficiency. Minimum clearance at rotor tips and sides with body. Robust body construction prevents distortion.


Tapered Rotor Design (SR Series) has a great advantage over all other valves by virtue of its tapered rotor, which allows rotor-to-body gap to be adjusted.  This is important when compensating for temperature, or for ease of assembly for applications requiring periodic inspection or cleaning.  On-the-fly adjustment is also available.  This valve also features a "universal" round/square combination flange on the inlet and outlet, speeding selection and installation.  Sizes 6" to 18".


Drop Through (IF Series) Rotary Airlock design is the workhorse of the line.  For all applications requiring rugged construction including high loads and differential pressures.  Sizes 4" to 36".


Offset Flange Rotary Airlock (OF Series) shares all of the heavy duty castings and precision machining of the IF series, with the exception of the offset flanges.  Because the inlet flange is offset relative to the rotor, flooding and overfilling of the rotor pockets is limited, which greatly reduces product shearing.  This design is recommended for granular and pelletized products such as plastic chips.  Heavy cast bodies, end covers, oversized shafts, adjustable packing gland seals and sealed outboard roller bearings provide reliable service and long operating life.  Sizes 4" to 18".


Blow-Through Rotary Airlock (BS Series) is a compact valve that incorportes a cast-in pneumatic pick up port.  The air rushing past the rotors helps to dislodge fine cohesive producs and increases valve efficiency.  Sizes 6" to 16".


Twin-Outlet Diverting Rotary Airlock combines the function of a rotary feeder/airlock and diverter valve in one simple mechanism.  Select left or right discharge by changing rotor direction via motor and reversing switch.  Only one moving part.  Very compact.  Exclusive tapered rotor allows rotor gap to be easily adjusted.  Heavy cast aluminum, iron or stainless steel valve body.  Adjustable apcking gland shaft seals -- purge available.  Heavy duty permanently sealed outboard roller beaerings.  Ideal for vacuum or pressure conveying systems.  Available in five sizes with capacities up to 2,500 cubic feet per hour.


Dust Collector Rotary Airlock (RDV Series) is a low maintenance economy model that does not skimp on quality.  Simplified design utilizing oilite bushings, ring seals, replaceable rotor tips (metal or poly) and compact direct gear drive reduces the number of parts while maintaining reliability.  Sizes 6" to 12".


High Pressure Valves (up to 350psig) are used for a variety of applications including feeding high pressure reactors and pneumatic systems.  Very heavy castings and special seals allow these valves to operate at incredible pressure while minimizing leakage.

High Pressure Rotary Airlock

Extended Length & Oversized Valves are commonplace at B&W.  There is virtually no limit to what we can do for you
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