Prayag Rubber Product

PU Seal (Polyurethane Seal)

PU seals refer to Polyurethane-based seals, commonly used in hydraulic systems for dynamic and static sealing due to their excellent wear resistance and elasticity.

Description:

• Purpose: Provide tight sealing in both dynamic (moving) and static (fixed) applications.

• Material: Made from Polyurethane (PU), which has high mechanical strength, elasticity, and resistance to abrasion.

• Types:

  • Rod and piston seals

  • Wiper seals

  • Buffer seals

• Operating Conditions:

  • Pressure: Up to 400 bar

  • Temperature: -40°C to +100°C (some types up to +120°C)

  • Speed: Suitable for high dynamic applications

Applications:

• Construction machinery

• Agricultural equipment

• Industrial hydraulic cylinders

• Injection molding machines

Advantages:

• High abrasion resistance

• Excellent mechanical properties

• Long service life

• Good chemical and oil resistance

PU Wiper Seal – Overview

A PU Wiper Seal (also called a dust seal) is a hydraulic sealing component made from polyurethane (PU), designed to remove dust, dirt, moisture, and other contaminants from a piston rod as it retracts into the hydraulic cylinder. It plays a protective role by preventing external particles from entering the system, which could damage internal components and reduce performance.

🔍 Key Features ✅ Benefits

• Excellent abrasion resistance

• High tensile strength

• Long-lasting durability in harsh environments

• Prevents contamination, protecting internal seals and hydraulic fluid

• Compatible with a wide range of hydraulic oils and fluids

🔄 Common Applications

• Construction equipment (excavators, bulldozers)

• Agricultural machinery

• Injection molding machines

• Forklifts and material handling systems

• Presses and automation equipment

🛠️ Types of PU Wiper Seals

• Scraper Wipers: Rigid design for aggressive scraping

• Lip Wipers: Soft contact with the rod, ideal for low-friction applications

• Double-acting Wipers: Seal in both directions for environments with internal pressure behind the wiper

📏 Installation Note

PU wiper seals are usually installed in open or closed grooves on the cylinder's gland or end cap. They may require specialized tools for proper insertion without damage.

Would you like:

• Photos or diagrams of different PU wiper seal profiles?

• A comparison between PU and rubber wiper seals?

• Size charts or manufacturer catalogs?

Let me know how I can assist further.

PU Seal (Polyurethane Seal)

PU seals refer to Polyurethane-based seals, commonly used in hydraulic systems for dynamic and static sealing due to their excellent wear resistance and elasticity.

Description:

• Purpose: Provide tight sealing in both dynamic (moving) and static (fixed) applications.

• Material: Made from Polyurethane (PU), which has high mechanical strength, elasticity, and resistance to abrasion.

• Types:

  • Rod and piston seals

  • Wiper seals

  • Buffer seals

• Operating Conditions:

  • Pressure: Up to 400 bar

  • Temperature: -40°C to +100°C (some types up to +120°C)

  • Speed: Suitable for high dynamic applications

Applications:

• Construction machinery

• Agricultural equipment

• Industrial hydraulic cylinders

• Injection molding machines

Advantages:

• High abrasion resistance

• Excellent mechanical properties

• Long service life

• Good chemical and oil resistance