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U-Cups Loaded - PolyPaks ®

High Performance Loaded U-Cup Seal 

The O-Ring loaded U-cup is a single direction piston seal, meaning it can only seal if the pressure is coming from one direction. Since the sealing method is single directional, two loaded U-cups must be installed for dual direction hydraulic piston applications.

The lip designed is a straight lip design, so the loaded U-cup has good seal ability but also proves to be excellent at contamination removal away from the sealing lip. Overall, the shape of the loaded U-cup is a large rectangle that greatly adds to the stability of the seal. Also like most polyurethane seals, the loaded U-cup features an O-Ring energizer, which is designed to activate the seal at lower pressures.

The O-Ring Store LLC, We make getting o-rings easy!!

The O-Ring Store LLC began in 2007 supplying O-Rings primarily to the large Paintball industry including our own shop and field. Over the last decade we have been fortunate enough to supply O-Rings and Hydraulic Seals to tens of thousands of customers in every industry. The crew is comprised of friends and family that work hard for each other and everyone that relies us to be their O-Ring supplier. Outside a select few, the big O-Ring brand service levels have became counterproductive to real customer service so we have been developing a network of partners with unique capabilities that allow us to provide a multitude of products, materials, and production capabilities to ensure our customers receive the best product and service options possible. This has allowed us our own line of branded materials which utilize the same raw polymers and contract manufacturers as the big brands, but without the overhead, complications and attitudes that result in high prices in lead times. Currently we stock over 50,000,000 O-Rings and Seals . Due to customer requests and to better our processes, we have begun the process to be ISO 9001 Certified in the first quarter 2020. It has been and will continue to be a wonderful journey with challenges and rewards. Thank you for your support and confidence.

Proud to be an Authorized Freudenberg Sealing Technologies Distributor! Expanding our Mil-Spec, Aerospace and Chemical Resistant O-Rings to new Extremes.

Freudenberg NOK Sealing Technologies is a leading manufacturer in Europe and America for various types of industrial seals, o-rings, piston seals, and shaft seals. The company’s sealing products are well-known for their cost saving benefits such as superior speed, efficiency, quality, and flexibility. Freudenberg provides solution driven products by using global processes and world-class manufacturing methodologies.