Drop Thru Rotary Airlock Valves – Heavy Duty, Dependable, Versatile and Long Lasting

Drop Thru Rotary Airlock Valves

The Drop Thru Rotary Airlock Valve is a Heavy Duty Cast Valve that is the workhorse of rotary valves. This series has the most available size range and an infinite number of options. From dust collection to pneumatic conveying systems, from extreme cold to extreme heat – the Drop Thru Airlock will get the job done.


Round Rotary Airlock Valve


Cast Bodies & End Covers

The all-important outer shell is the body and end covers which are all high quality, heavy duty castings. Available materials are Cast Iron, Cast 316 Stainless Steel, Cast Steel and Cast Aluminum. All castings are precision machined on a CNC center. This means the body bore is true and straight with no high spots or voide. The end covers have a raised face that is precisely machined to match the body bore insuring a tight concentric fit. This preicison insures tight tolerances with the rotor and part interchangeability. The heavy-duty Drop Thru Rotary Airlock design ensures valve integrity even in the harshest applications. Round, Square and Rectangular flanges are available.


Heavy Duty Rotors
The internal rotor is the heart of the valve that allows material transfer with minimal pressure/vacuum loss. CCI rotors feature an oversized shaft that eliminate deflection. Eight vanes are standard on all rotors, maximizing the number of vanes in close proximity to the body with which our design is four which in turn minimizes air leakage. Numerous rotor options are available from Open End to Closed End, Fixed Blades to Adjustable Tips, Reduce Volume, Scalloped Pockets and Special Coatings just to name a few. All rotors are precision machined for tight tolerances and minimal clearance between the rotor and housing which is typically 0.004” to 0.006” regardless of size.


Stainless Steel Open Rotor


Regreasable Bearings
The bearings are mounted outboard to eliminate the possibility of contamination or ingress of material passing through the valve. The vast majority of the range features a 4-bolt design that is easily installed and removed. These bearings also feature a grease fitting for periodic maintenance, unlike most of our competitors that use sealed bearings which cannot be renewed.


Shaft Seals
Shaft seals consist of a stuffing box with four rows of packing and a gland follower. Standard packing is Teflon impregnated Kevlar, but multiple options are available such as Food Grade or High Temp to meet application requirements. Air purge shaft seals are also available which provide an air curtain/shield around the rotor shaft to prevent finer materials from escaping.


Heavy Duty Drive
Carolina Conveying valves use a High Efficiency, Inline, Helical Gearbox as standard. Why is this important? The helical gearbox transmits more torque than a right-angle gearbox, which not only eliminates stalling but also requires less power. The helical gears are also more robust and less susceptible to damage. ANSI roller chain with Taper Lock Sprockets is standard across the range with a steel, safety yellow chain guard. Totally Enclosed Fan Cooled motors suitable for dusty environments and outdoors are standard. Unlimited number of motor options are available (such as explosion proof, washdown duty, inverter duty, etc.) – all as required to meet the application requirements.


Square Rotary Valve


Size Matters
The Drop Thru Rotary Airlock has the most available size range:
Round Sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20, 24 and 30 inch
Square Sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 30 and 36 inch
We also have special rectangular flanges available such as 8” x 24” and 12” x 48” just to name two.
Typical stock includes 6” through 24” in Cast Iron with Round or Square Flanges available for quick delivery
Typical stock also includes 6” through 12” Round Cast 316 SS.


Application Expertise
Experience, experience, experience. Our team of engineers has a vast knowledge from numerous years in the bulk material handling industry. Let us help you pick the best valve to meet your application requirements and exceed all expectations. Call today for a free consultation.


Stainless Steel Rotary Valve

Square Rotary Airlock Valve


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