SEPCO Air Seal
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Fsepgo Sealing Equipment Products Co., Inc. SEPCO Air Seal The SEPCO Air Seal (SAS) is an engineered pneumatic sealing system designed to seal the shafts of equipment where typical contact seals, such as packing or mechanical seals are ineffective and often too costly to operate and maintain. Designed for wet or dry applications, the seal is particularly successful in powder and bulk solid processes. FEATURES & BENEFITS • Efficient design minimizes air use while maintaining internal sealing pressure profile. • Noncontact design lasts the life of the equipment. • Resilient to angular and parallel shaft movement. • Pressures up to 120 psi and materials available for a wide range of temperatures. • Split seals are available in most designs. • A wide range of materials are available for most application requirements. • Requires little to no maintenance after installation. • Applicable to bulk material handling equipment such as mixers, blenders, agitators, pulpers, screw conveyors, refiners, and rotor valves.

HOW IT WORKS The SAS relies on engineered clearances to develop a uniform sealing pressure/velocity profile using air or gas. This eliminates low-pressure areas and mitigates the chance of product ingress into the seal. The pressure profile forms a circumferential boundary layer internally that reduces the effects of shaft movement because the throttle is designed to float. The standard SAS is designed so the air flow in/ out of the seal is biased at 50% as can be seen in Figure 1. Installed correctly, the SAS is essentially a noncontact seal. For situations in which angular misalignment...

Floating throttle Throttle air inlet holes Bolt slots Figure 1. Air flow into and out of the SAS. These SAS requires no maintenance as long as air flows continuously to the seal. By design, product does not enter the seal or throttle area. This eliminates the need for maintenance. The material of construction keeps wear and corrosion from occurring. However, system upsets happen, and if product enters, the seal can be easily disassembled, cleaned, and reassembled. If the air supply is turned off during operation and with product introduced, the product may enter the seal. This will lead to...

SAS SAS STANDARD DESIGN PERIMETERS Working pressures up to: 120 psi Maximum misalignment capability Parallel: 0.0625 inch (total indicator reading) Angular: 1.5 degrees INDUSTRIES Pulp & Paper Food & Beverage Oil & Gas Mining Chemical Water & Wastewater Powder & Bulk Solids Handling The SEPCO quality system is certified to ISO 9001:2015. This information is based on data that we believe to be reliable. Since conditions of product use are outside of our control, we make no warranties, expressed or implied and assume no liability in connection with any use of this information. ©SEPCO 2018...