Products Description
Four-ring X-shaped rubber seal usually use polytetrafluoroethylene (PTFE) as the base material. PTFE has excellent high-temperature resistance and can maintain stable sealing performance under extreme conditions. It also has excellent chemical resistance and can resist the attack of a variety of chemicals, including acids, alkalis, solvents, etc.
Structural Features
The four-ring X-shaped rubber seal has a unique structure and consists of four lips forming four sealing boundaries. Each lip has a certain degree of elasticity and resilience, allowing it to adapt to uneven sealing surfaces and maintain the sealing effect when pressure changes. This structural design gives the four-ring X-sealing ring better sealing performance and resistance to compression deformation.
Advantages of Four-ring X-shaped Rubber Seal In Dynamic Sealing Applications
X-Rings (also known as Quad-Ring®) offer several advantages in dynamic sealing applications:
- Prevention of spiral distortion
The four-lobed design of the X-ring creates a stronger seal that resists spiral distortion. This makes it more stable than a standard O-ring in rotating applications.
- Lower friction
X-rings require less compression force, and this reduced force means less friction and longer seal life.
- Better start-up performance
The lubricant reserve created between the sealing lips of the X-Ring improves start-up performance.
- Longer service life
Less friction and therefore less wear, providing longer service life.
- Better sealing efficiency
With four sealing contact surfaces, the X-Ring is less susceptible to spiral distortion in static and dynamic sealing conditions, especially when using high pressures, and the same rectangular grooves as the O-Ring.
In summary, Four-ring X-shaped rubber seal outperform standard O-rings in dynamic sealing applications with their unique four-lobed design, especially when preventing spiral failure and extending service life are required. It can be widely used in sealing systems of reciprocating motion, rotary motion, and spiral motion.
The Following Table Is The Technical Data Sheet of PTFE：
| Property | Unit | Test method | Test parameter | Typical value |
| Hardness | Shore D | ASTM D2240 | (Shore D - 15 sec) | 60 |
| Density specific gravity | g/cm³ | ASTM D792 | 2.15 | |
| Tensile strength | MPa | ASTM D638 | Microtensile specimen of ASTM D1708, speed of testing 0.8mm/s | 29 |
| Ultimate elongation | % | ASTM D638 | Microtensile specimen of ASTMD1708,speed of testing 0.8mm/s | 300 |
| Compressive strength 1% deformation | MPa | ASTM D695 | 4.6 | |
| Friction coefficient - dynamic | ASTM D 3028(1) | speed 0.08m/s load 0.1 N/mm² sliding surface steel roughness Ra = 0.5 micron | 0.04 | |
| Friction coefficient - static | ASTM D 3028 (2) | 0.1 | ||
| Modulus of Elasticity | MPa | ASTM D638 | 280 | |
| Coefficient of thermal expansion from 25 to 100°C | °C-1 | ASTM E 831 | 16x10-5 | |
| Dielectric Strength (short time test) | kV/mm | ASTM D149 | 35 |
Products FAQ Description
- How to choose materials under different working conditions?
If the working environment temperature is high, you can choose a four-ring X-type rubber seal made of fluororubber, which can withstand high temperatures and has good chemical stability; in a low-temperature environment, a seal made of silicone rubber is a better choice,
- which has good cold resistance and can maintain good elasticity at low temperatures; if it is in contact with oil media, the nitrile rubber seal has good oil resistance and can ensure normal operation in an oil environment.
- How to determine the appropriate size?
It is necessary to accurately measure the size of the sealing part, including the inner diameter, outer diameter and groove width, and then select a four-ring X-type rubber seal of the corresponding size according to the measurement results. Generally, the size tolerance of the sealing ring is required to match the tolerance of the sealing part. Too loose may cause leakage, and too tight may cause difficulty in installation or damage the sealing ring.
- What preparations need to be made before installation?
The sealing surface should be thoroughly cleaned to remove oil, impurities, rust, etc., to ensure that the sealing surface is smooth and flat; at the same time, check whether the sealing ring has defects, such as cracks, deformation, aging, etc. If there is a problem, it should be replaced in time.
- What precautions should be taken during installation?
During installation, avoid forcibly stretching or twisting the seal ring to prevent damage to its structure; you can use appropriate lubricants, such as vaseline, but make sure that the lubricant is compatible with the rubber material to avoid corrosion or swelling of the seal ring; during installation, make sure that the seal ring is installed in place without misalignment or tilt.
- How should the seal ring be stored?
It should be stored in a dry, ventilated, and cool environment, avoiding direct sunlight and high temperature and humidity; the seal ring should avoid contact with chemicals such as acids, alkalis, and oils to prevent it from being contaminated and corroded; seal rings of different specifications, models, and materials should be stored separately to avoid confusion.
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