HBY stands for High-speed Balanced Seal, and it is a type of hydraulic seal that is designed to provide a high level of sealing performance in high-speed applications. HBY seals are typically made of durable material, such as nitrile rubber or polyurethane, and are available in a variety of shapes and sizes.

HBY 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 HBY hydraulic seals:

• Material: Nitrile rubber or 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 20 m/s (66 ft/s)

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

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

HBY 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

HBY 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.