U Cup Seal Groove Design

The hu seal is popular in low pressure applications where a low friction seal would be beneficial.

U cup seal groove design.

Homogenous u cups block vees are a non loaded single material u cup. P figure 8 u cup. Heel of the u cup. Also known as type b seals loaded lip seals and polypaks these u cups are wider than our other o ring loaded u cup seals for better stability and fit in wider grooves.

The seal is most commonly used in pneumatic applications as a rod or piston seal. Groove depth refers to the axial dimension of the seal gland and adequate space is required for the o ring loaded u cup to perform properly. Developed from the standard symmetrical u cup. Fluid power seals sizes readily available in a multitude of materials to provide optimal compatibility with the various hydraulic fluids encountered in service.

The seal design and the polyurethane properties give efficient fluid sealing reduced friction values and low wear rate. An o ring secures them to the rod or piston preventing leaks at low pressure and as the seal wears. The design is suited for situations where space is limited. Lip seal with straight cut scraper lip design 6 10 bpp o ring energized u cup per lip seal with beveled lip design 6 14 sl dual compound dual lip seal 6 24 us symmetrical u cup seal 6 27 series description light load u cup with 6 18 8500 light load u cup with scraper lips 6 18 an6226 symmetrical army navy an specification 6 30 catalog eps.

Interference fit in the groove. Squeeze in this area would result in an extremely high loading of the sealing lips and can result in increased friction heat seal wear and likely premature seal failure. The sealing effect of a u cup symmetric seal is obtained thanks to the lip pre compression due to installation and to the pressure effect on the lips. Parker s 8400 profile u cup is a light load symmetrical lip seal for use in either rod or piston sealing applications.

The thin flexible lip design reacts to low pressure and provides an extremely smooth steady movement with less break away force required because of the inherent low friction. It assures improved sealing performance due to the following features. U cup is a specialized piston seal design. The o ring store offers an assortment includes rod piston and wiper seals as well as guides o rings and back up rings.

U cup has an id smaller than the groove for which it is intended.