PU O-Ring Wear Resistant TPU Seal Ring for Hydraulic & Pneumatic Systems

1. Product Advantages

• Superior Wear Resistance: Made of high-quality polyurethane (PU), the wear resistance is 3-5 times that of standard rubber O-rings, effectively extending the service life and reducing replacement frequency.

• Excellent Elasticity & Compression Recovery: It can maintain good elasticity under long-term pressure, with excellent compression set performance (<20% at 70°C, 22h), ensuring tight sealing without leakage.

• Strong Oil & Chemical Compatibility: Resistant to hydraulic fluids, mineral oils, fuels and most common industrial chemicals, suitable for harsh working environments.

• Wide Temperature Adaptability: It can operate stably in the range of -40°C ~ +90°C (special grades are available), adapting to various indoor and outdoor industrial scenarios.

• High Mechanical Strength: Tensile strength up to 30-45 MPa, good tear and extrusion resistance, not easy to damage during installation and use.

• High Customization: We provide customized services for inner diameter (2mm-2000mm), cross-section (1.0mm-25mm), hardness (60A-95A Shore) and color, meeting diverse application needs.

• Cost-Effective: Compared with FKM/Viton O-rings, it has more advantages in price while ensuring performance; compared with NBR O-rings, it has longer service life and lower comprehensive maintenance costs.

2.How does an O-ring works?

Schematic showing how an O-ring seals in the gland. The O-ring deforms as a response to pressure to create the seal line.

3. Application Range

PU O-rings are widely used in various industrial fields due to their excellent comprehensive performance, especially suitable for scenarios requiring wear resistance, oil resistance and stable sealing:

• Hydraulic Systems: Hydraulic cylinders, hydraulic pumps, hydraulic valves, hydraulic presses, and other hydraulic equipment, used for sealing hydraulic oil.

• Pneumatic Equipment: Air cylinders, air compressors, pneumatic valves, pneumatic tools, etc., suitable for compressed air sealing.

• Automotive Industry: Engine seals, transmission system seals, fuel system components, brake system seals (excluding brake fluid contact parts), etc.

• Construction Machinery: Excavators, loaders, bulldozers, cranes, etc., used for sealing hydraulic and pneumatic components in harsh construction environments.

• Agricultural Machinery: Tractors, harvesters, irrigation equipment, etc., adapting to the harsh working conditions of farms (dust, oil, temperature changes).

• Industrial Machinery: Conveyors, motors, pumps, pipe joints, flanges, etc., suitable for both static sealing and low-speed dynamic sealing.

• Other Fields: Medical equipment (non-contact with human body), electronic equipment, marine equipment (excluding strong corrosive medium environments), etc.

5. FAQ

Q1: What is the difference between PU O-rings and NBR/FKM O-rings?

A1: Compared with NBR O-rings, PU O-rings have better wear resistance and higher mechanical strength, with a service life 2-3 times longer; compared with FKM O-rings, PU O-rings are more cost-effective, have better low-temperature flexibility (-40°C can be used normally), and are easier to install.

Q2: Can PU O-rings be used in high-temperature environments?

A2: The standard PU O-rings can be used continuously at -40°C to 100°C. If the working temperature exceeds 100°C, we can provide special high-temperature resistant PU materials, which can withstand up to 120°C (short-term use).

Q3: Are PU O-rings resistant to all chemicals?

A3: No. PU O-rings are resistant to hydraulic fluids, mineral oils, fuels and most common industrial chemicals, but they are not resistant to strong acids, ketones (such as MEK), esters, and chlorinated hydrocarbons. Please confirm the medium type before use.

Q4: Can I customize the size and color of PU O-rings?

A4: Yes. We support full customization, including inner diameter (2mm-2000mm), cross-section (1.0mm-25mm), hardness (60A-95A), and color. You only need to provide the specific parameters or drawings, and we can produce according to your requirements.

Q5: How to store PU O-rings correctly?

A5: Please store PU O-rings in a cool, dry, and ventilated environment, avoiding direct sunlight, high temperature (above 40°C), and humidity (above 80%). Do not store them together with oils, chemicals, or sharp objects to prevent aging, deformation, or damage.

Q6: What is the service life of PU O-rings?

A6: The service life depends on the working environment (temperature, pressure, medium, friction intensity). Under normal working conditions (25°C, 5MPa, hydraulic oil medium), the service life is 2-3 times that of standard rubber O-rings, generally 1-2 years.

6.O-Ring dimensions

About the Dimensions, you can download it through below link.

http://www.foreverseals.com/download.html