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Powder/Bulk Solids

The Source for Dry Processing and Bulk Handling Technology

Valves, Gates, & Airlocks Focus - June 09

May 27, 2009

High-Speed Abort Gate
Standard features of this abort gate include heavy-duty fully welded steel construction, painted OSHA safety yellow, 110-V control panel, manual gate reset by a hand-crank actuator, gate accelerating springs, fail-safe electromagnets, steel gate seals, and limit switches for gate position indication. Electric gate reset, weather hood, inlet and outlet transitions, support structure, ladder, and service platform are all available options. Gates are 100% compatible with all brands of fire- and explosion-suppression equipment. All units are factory tested prior to shipment.
Imperial Systems Inc., Jackson Center, PA 800-918-3013 www.isystemsweb.com

Roller Gates
Available in a wide variety of configurations, including rectangular sizes and round inlet and outlet transitions for added functionality, these versatile roller gates handle dry bulk material in gravity-flow applications where positive material shutoff and dust-tight sealing are required. They can be applied to shut off or meter the flow of fine and moderately abrasive powders, in addition to small to large granules or pellets. They also handle sticky materials, horizontal or vertical valve orientation, and are ideal for the food, cement, chemical, plastics, and textile industries.
Vortex Valves North America, Salina, KS 785-825-7177 www.vortexvalves.com

Rotary Airlock
Extremely hard and generous ceramic and tungsten carbide coatings make this rotary airlock abrasion resistant and suitable for handling the most abrasive products, including fly ash, limestone, rutile ore, and feldspar. Features include: ductile iron body and cast-iron end plates; 0.1-in.-thick ceramic bore; tungsten carbide throat protection; heavy-duty fabricated eight-vane rotor; tungsten carbide rotor vane and 0.1-in.-thick shroud tips; air purge seal connections; and an air gap between seals and bearings.
FLSmidth Inc., Bethlehem, PA 800-523-9482 www.conveyorspneumatic.com

Mucon Iris Diaphragm Valve
The Mucon iris diaphragm valve provides strong, gentle, and precise flow control of powder and granular materials. It is available in manual, pneumatic, and motorized operation, and the dust-tight design allows for infinite flow control from full bore to trickle feed. The valve comes in a variety of materials suited to any application and is easily cleaned with tool-free maintenance.
Kemutec Powder Technologies, Bristol, PA 215-788-8013 www.kemutec.com

Rotary Valves
This company offers heavy-duty (HD), maximum-duty (MD), and quick-clean (QC) Aerolock rotary valves, as well as light-duty (LD) and blow-through (BT) models. These rotary valves are available with round or square inlet and outlet configurations that provide 6–20-in. openings. Standard materials of construction include cast-iron or stainless-steel housings and end plates with carbon-steel or stainless-steel rotors. The housing and end plates can be coated with specified material for greater wear resistance. The valves have recently met CE certification and ATEX 3D classifications.
K-Tron Process Group/K-Tron Premier, Salina, KS 785-825-1611 www.ktronprocessgroup.com

Double Flapgate Airlock Valves
These double flapgate airlock valves are engineered and manufactured for extreme operating environments or highly abrasive materials. They are specifically designed to control the rate of material flow through a system and at the same time prevent air leakage by isolating the processing system’s pressures. They can be designed to seal completely with pressure differentials up to 20 psi, are built for heavy-duty service, are highly resistant to abrasive materials, feature long bearing and shaft life for fewer system shutdowns, and have access covers to simplify inspection and maintenance. They are available in models able to operate in temperatures up to 1650°F.
Wm. W. Meyer & Sons Inc., Libertyville, IL 800-963-4458 www.wmwmeyer.com

Bulk Material Valve
The patented bulk material valve was designed for dense- and dilute-phase pneumatic conveying systems for transporter fill valve, discharge, vent applications, transfer lines, under baghouses, silos, and dust collectors. The valve is designed to operate in process temperatures up to 550°F and pressures from vacuum to 100 psi. The live-loaded outside stuffing box allows for changing or adding packing without taking the valve out of the line. The valve is available in sizes from 2 to 14 in. and in cast-iron and carbon steel. Cast-iron valves from 2 to 8 in. are available from stock.
Everlasting Valve Co., South Plainfield, NJ, 908-769-0700 www.everlastingvalveusa.com

Stainless Steel Valves
The Quick Release butterfly valve is available in sizes from 4 to 10 in. No bolts are used to hold the valve together; one sanitary clamp ring is used. A stainless-steel actuator can also be supplied.
M.O. Industries Inc., Whippany, NJ 973-386-9228 www.moindustries.com

Rotary Valves
The Britton Procol rotary valve is engineered to transfer dry granular solids and powders in gravity, pressure, or vacuum systems. The standard model is a heavy-duty cast design with stiffening ribs to prevent distortion and includes integral shear planes in the valve inlet to reduce product shearing loads. The rotor includes a heavy-duty shaft to withstand high differential pressures. Rotor designs include open-end fixed blade, closed-end fixed blade, adjustable tipped blades, reduced pocket, and scalloped pocket. Rotors are supported in sealed ball bearings outrigged from the valve end plates to prevent contamination. Other models available include a blow-through type and special-designed fabrications.
SMS International Inc., Cortland, IL 800-296-1149 www.smsint.com

Flex Tip Airlock
This airlock’s design is suited for rugged applications. The standard eight-vane rotor design offers a tight seal. Features include variable speed selection, wiper material, and inlet and outlet size. The company has 17 different models in stock, all of which come with either round or square flanges. An entire inventory of replacement parts is stocked at all times.
Imperial Systems Inc., Jackson Center, PA 800-918-3013 www.isystemsweb.com

Inflatable Seated Butterfly Valve
This inflatable seated butterfly valve is ideally suited for abrasive materials such as sand, feldspar, fly ash, and most other dry, granular materials that reduce valve life. The inflatable seat design provides a better seal by utilizing air pressure to expand the seat against the disk, which provides more sealing area and an even pressure distribution against the disk every time. The seat automatically compensates for wear when it inflates against the disk, extending valve life considerably. Standard sizes range from 2 to 30 in. The valves are available in a wide variety of construction materials including stainless steel and lightweight aluminum.
Posi-flate, St. Paul, MN 651-484-5800 www.posiflate.com

Rotary Airlock
The heavy-duty drop-thru rotary airlock is suitable for use on both gravity and pneumatic conveying applications up to 20 psi. The airlocks are available with both round and square flanges and are of heavy-duty design with outboard bearings and gland-type shaft seals. Numerous rotor options are available including open and closed end, fixed or adjustable blades, bevel edges, scalloped pockets, reduced capacity, Teflon-coated, and flexible rubber tips. Sizes range from 3½ to 36 in.
Rotolok Valves Inc., Monroe, NC 704-282-4444 www.rotolokvalve.com

Side-Entry Rotary Airlock Valve
This side-entry rotary airlock valve is used in applications where product shearing is a concern. The valve name derives from the offset inlet and outlet flanges, where the product enters the side of the rotor instead of the top. On a normal valve, shearing takes place as the rotor rotates into the housing. When these two straight edges meet on a typical drop-thru rotary airlock, this provides a pinch area where the product can shear or jam. With the side-entry rotary airlock, the product is caught on the upswing of the rotor blades so that the product is constantly falling away from the shear point. The rotor pockets also do not fill up completely, which additionally reduces the likelihood of shearing. Lastly, the throat has a V shape that helps push product out of the way. Sizes from 6 to 20 in. are available.
Carolina Conveying Inc., Canton, NC 828-235-1005 www.carolinaconveying.com

Rotary Airlock
The MSRP series Parallel Bore rotary airlock is designed so the maximum number of blades remain in contact with the body at one time without affecting throughput. A substantial throat opening at the valve entry allows high pocket filling efficiency. There is minimum clearance at the rotor tips and the sides with the body. Robust body construction prevents distortion. Sizes range from 6 to 16 in. with square or round flange patterns. This valve is suitable for operation up to 750°F and conveying pressures of 20 psi.
Bush & Wilton Inc., Charlotte, NC 704-573-6858 www.bushandwilton.com