OUY stands for Oil U-cup seal. It is a type of hydraulic seal that is designed to provide a high level of sealing performance in harsh environments. OUY seals are typically made of a combination of nitrile rubber and polyurethane. The polyurethane provides a durable sealing surface, while the nitrile rubber provides flexibility and resistance to oil and grease.

OUY seals are typically used in hydraulic cylinders and other hydraulic components that are subjected to high pressures, temperatures, and speeds. They are also used in applications where the seal is exposed to dirt, dust, and other contaminants.

Here are some of the technical specifications of OUY hydraulic seals:

• Material: Nitrile rubber and polyurethane
• Temperature range: -40°C to +100°C (-40°F to +212°F)
• Pressure range: 0 to 50 MPa (0 to 7250 psi)
• Speed: Up to 15 m/s (49 ft/s)

OUY seals are used in a variety of construction machinery applications, including:

• Excavators
• Bulldozers
• Backhoes
• Wheel loaders
• Skid steer loaders
• Cranes
• Concrete mixers
• Asphalt pavers

OUY seals offer the following benefits:

• Excellent sealing performance
• Resistant to wear and tear
• Suitable for use in a wide range of hydraulic applications
• Long service life
• Can withstand high pressures, temperatures, and speeds

OUY hydraulic seals are a reliable and cost-effective way to protect hydraulic systems in construction machinery from leaks and contamination. They are especially well-suited for applications where the seal is subjected to harsh operating conditions.