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Piston U-Cup Seals

The demands placed on a piston seal depends greatly upon the operating conditions for which they have been chosen. Bore surface finish, hydraulic fluid type, contamination, application cycle rate and speed, pressure, and temperature are just a few of the factors that can help determine what kind of seal is right for a given application. Unlike a rod seal, where leaking of hydraulic fluid is not acceptable, a small amount of leakage in piston area is generally seen as desirable. This small amount of fluid acts as a lubricant for the piston seal during operation. Piston seals, both single- and double-acting, can be designed for use with integrated or separate back-up or guide rings.

It is critical to choose the type of seal designed to provide the correct amount of lubrication film that can pass through the contact area between the seal and the cylinder tube surface. Failure to do so could result in stick / slip operation if the friction is too high, or increased wear rate of the seal, if the bore walls are wiped clean of lubrication.

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.