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Pawling Engineered Products

Engineered Elastomeric Technologies for Sealing, Clamping, Actuating

Powder/Bulk Solids Handling

Powder and Bulk Material Handling Seals

Sealing against dry particulates or chemicals can present many challenges. To ensure a positive seal which can be maintained time and again, you need to have the right design and use the proper materials. At Pawling EP, we have much experience with powder and bulk material handling seals and our products are a perfect fit for many applications in this industry. Some examples are:

  • Quick connect/disconnect seals for hopper to transfer cars and FIBC bulk bag filler systems
  • Inflatable follower plate and drum filling seals designed to withstand the hydraulic forces of highly viscous fluids
  • Unique, FDA-compliant, thermoplastic elastomer (TPE) compression gaskets to seal doors and other closures on machinery
  • Chemical resistant fluorosilicone (and fluoroelastomer) compression seals designed to withstand harsh cleaning chemicals

Detailed Market Applications

Hopper to Transfer Car Inflatable Seal
Hopper to Transfer Car Inflatable Seal Product: Pneuma-Seal
Use: Inflatable Seal
Description: Pneuma-Seal inflatable seals can be installed on the mouth of a hopper valve or metering device and are designed to expand axially down to form a leak-tight seal around the fill opening in a transfer cart. Type 1 seals are best suited for this application (click image to view animation).
Inflatable Seal for Viscous Pumping Equipment
Inflatable Seal for Viscous Pumping EquipmentProduct: Pneuma-Seal
Use: Inflatable Seal
Description: Types 10A, 10B, or 10X Pneuma-Seals are the ideal solution for sealing around the periphery of follower plates when pumping viscous liquids, such as grease, paste, or cake frosting from their container drums. The rectangular profile of these seals minimizes the tendency of roll out from the seal's retainer which can pinch the seal when the follower plate descends (click image to view animation).
Drum Filling Inflatable Seal
Drum Filling Inflatable SealProduct: Pneuma-Seal
Use: Inflatable Seal
Description: Type 1 and 2 style inflatable seal work particularly well for drum filling applications where the seal on the cover expands radially outward against the inside of the drum to allow for for leak-tight filling (click image to view animation).
Bulk Bag Filler Inflatable Seal
Bulk Bag Filler Inflatable SealProduct: Pneuma-Seal
Use: Inflatable Seal
Description: The inflatable seal on the filler spout expands radially outward to effect a dust-tight seal against the inside of the bag neck during filling. Any of the Type 1 or Type 2 Series of Pneuma-Seals work very effectively in this application (click image to view animation).
Mixer Lid Inflatable Seal with Square Corners
MIxer Lid Inflatable SealProduct: Pneuma-Seal
Use: Inflatable Seal
Description: Pneuma-Seal inflatable seals can be configured with pre-molded 90 degree corners to effect leak-tight seals for hinged or sliding covers on accessways and other openings in mixers and other powder/bulk or fluid handling processing equipment.Type 1 style seals are best suited for this application. (click image to view animation).
Fluorosilicone Seal for Chemical Processing
Custom Fluorosilicone Inflatable SealProduct: Rubber and Plastic Products
Use: Compression Seal
Description: Fluorosilicone is used to combat both high temperatures and aggressive chemicals.  In this application, semi-conductor assemblies are treated in a large chemical bath.  The fluorosilicone P-strip is used to seal the cover while the machine is operational.
Inflatable Seal for Butterfly Valve
Inflatable Butterfly Valve SealProduct: Pneuma-Seal
​Use: Inflatable Seal
Description: Pneuma-Seal inflatable seals are 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.(click image to view animation).
Slide Gate Valve Inflatable Seals
Inflatable Slide Gate SealProduct: Pneuma-Seal
Use: Inflatable Seal
Description: 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 (click image to view animation).
Inflatable Seals for Rotary Union Ports
Inflatable Seals for Rotary Union PortsProduct: Pneuma-Seal
Use: Inflatable Seal
Description: 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.