Quad-Ring® (X-Ring) Gaskets

Efficient sealing and increased extrusion resistance

What are Quad-Ring® gaskets?

The Quad-Ring seals®, also known as X-Ring o quadruple ring seals, are a type of gasket designed to prevent leaks in hydraulic and pneumatic systems. They differ from O-rings because of their X-shaped section, which generates four points of contact instead of two, providing a more effective and stable seal.

Thanks to their optimized design, these gaskets offer increased extrusion resistance, reduced friction and significant wear reduction, making them an ideal choice for demanding applications.

Quad-Ring® (X-Ring) gasket materials available

Quad-Ring® (X-Ring) gaskets are manufactured in a variety of elastomers, each with specific properties for different applications.

Standard materials and characteristics

Material	Temperature resistance (°C)	Main properties	Recommended applications
Material: NBR (Nitrile)	Temperature resistance (°C): -40 a +120	Main properties: Resistance to oils and fuels	Recommended applications: Hydraulics, pneumatics, automotive
Material: FPM-Viton® FPM-Viton	Temperature resistance (°C): -20 a +200	Main properties: High chemical and thermal resistance	Recommended applications: Chemical, aerospace and pharmaceutical industries
Material: EPDM	Temperature resistance (°C): -50 a +150	Main properties: Resistance to steam and ozone	Recommended applications: Food, pharmaceuticals, energy
Material: VMQ (methylvinyl silicone rubber)	Temperature resistance (°C): -60 a +230	Main properties: Retains its elasticity at very low temperatures (< -60 ºC).	Recommended applications: Food, health, cryogenic applications
Material: virgin PTFE (polytetrafluoroethylene)	Temperature resistance (°C): -200 a +260	Main properties: Chemical, petrochemical and medical industry	Recommended applications: Chemicals, oil and gas, pharmaceuticals and food

Note: Others materials available upon request, for specific applications

Advantages of Quad-Ring® (X-Ring) seals over O-rings

The design in X shape Quad-Ring® (X-Ring) seals offer key advantages that differentiate them from conventional O-Rings:

Increased sealing performance: its four-lobe design provides four contact surfaces, The pressure is distributed better and sealing is improved.
Increased resistance to extrusion and deformationQuad-Ring® (X-Ring) seals: Thanks to their optimized design, Quad-Ring® (X-Ring) seals better resist extrusion under pressure, preventing premature failure.
No twistingO-rings: unlike O-rings, their design prevents them from turning or twisting during installation or use, ensuring a perfect and constant fit.

Our DFL111 profile - High Performance X-Ring

At Epidor, we also manufacture our own X-Ring under the DFL111 profile, designed to offer superior performance in demanding conditions, including high-pressure applications and rotating motion environments.

Characteristics of the DFL111 profile

Available in advanced technical materials such as:

PUBL and CHPU57D → suitable for high pressure applications, even applicable on both sides of the joint.
SLPU (self-lubricating) → Ideal for rotary applications, it reduces friction and significantly improves wear resistance over any elastomer.

Quad-Ring® (X-Ring) seals working conditions

Parameter	Maximum value
Parameter: Pressure	Maximum value: Depending on the extrusion groove, they can operate with pressures up to 40 MPa (400 bar).
Parameter: Velocity (linear motion)	Maximum value: To 0.5 m/s
Parameter: Speed (rotary motion)	Maximum value: To 2.0 m/s
Parameter: Working temperature	Maximum value: From -40 ºC to +200 ºC (depending on material)

FAQ's about Quad-Ring® (X-Ring) seals

What is the difference between a Quad-Ring® and an O-Ring?

Quad-Ring® gaskets have four points of contact instead of two, which improves extrusion and pressure resistance. In addition, their design prevents twisting during installation or use, reducing the risk of failure.

Can Quad-Ring® seals be used in rotary applications?

Yes, they can be used in rotating applications for speeds of up to 2.0 m/s. For higher speeds, it is recommended to evaluate other options such as low friction seals or lip seals, among other solutions.

In what type of housings are Quad-Ring® (X-Ring) seals installed?

They are installed in rectangular section grooves without sharp edges, which improves fit and performance.

Do you need Quad-Rings for your project?

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