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Inflatable seals solve very difficult sealing problems & may be a cost effective alternatives to mechanical devices, such as air cylinders or cam locks. Inflatables are particularly well suited for use in bulk material handling applications. See animations showing how inflatable seals work where rapid sealing and unsealing are imperative

Hopper to Transfer Cart
Pneuma-Seal on the mouth of the hopper valve or metering device expands axially down to form a leak-tight seal around the fill opening in a transfer cart.
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Bulk Bag Filling
The Pneuma-Seal on the filler spout expands radially outward to effect a dust-tight seal against the inside of the bag neck during filling.
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Drum Filler
The Pneuma-Seal on the drum cover expands radially outward against the inside of the drum for leak-tight filling.
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Slide Gate Valves
Pneuma-Seal inflatable seals provide the tightest seal possible for controlling the flow of very fine materials. The valve seal does not inflate until the blade is firmly in position, and then the seal inflates, creating a leak-free seal. The inflatable seal deflates before the blade opens again.
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Butterfly Valve
Pneuma-Seal is ideal for butterfly valves in tight sealing applications. The clearance between the deflated seal allows for low torque rotation of the disk and eliminates the damaging effect of abrasion on the seal. When the disk is fully closed, the seal inflates radially inward against its edge to effect a leak-free condition.
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Mixer
Pneuma-Seals with pre-molded corners effect leak-tight seals for hinged or sliding covers on accessways and other openings in mixers and other powder and bulk solids processing equipment.
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Rotary Valve Ports
Ports and passages through rotary valves are readily sealed leaktight with Pneuma-Seal. The seals can be located in glands machined in the valve body to expand inward against the plug or they can be located in glands machined in the plug to expand outward against the valve body. When deflated, the plug can be rotated with minimum torque since there is no seal frictional force to overcome. When inflated, a tight seal is formed to control the direct flow of the fluid or solid material. Pneuma-Seal is available in a variety of elastomers to resist a wide range of chemicals.
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We welcome your questions about challenges you are experiencing with sealing issues. E mail us to discuss your application