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Black NBR FKM Rubber Quad Ring For Machinery Seal

Black NBR FKM Rubber Quad Ring For Machinery Seal

FKM Quad Ring

NBR Quad Ring

Machinery Seal Rubber Quad Ring

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Model Number:

AS 568 Standard

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Product Details
Quad Ring
X Shape Section
Static And Dynamic
Long Service Life ,lower Friction
Black, Or Any Other Colors As You Inquiry
Payment & Shipping Terms
Minimum Order Quantity
Packaging Details
PE inside , Carton Outside, Cartons on pallets(if needed)
Delivery Time
7-45 work days
Payment Terms
L/C,Paypal, T/T
Supply Ability
30000000 PCS / Month
Product Description

 High Quality Black NBR FKM Rubber Quad-Ring for Machinery Seal



NBR Quad Ring Material Description


NBR(nitrile butadiene rubber)

*Service Temperature

For NBR the service temperature can be designed from -50 C to 100 C or up to 120 C depending on

different acrylonitrile content and formula.


NBR compounds have excellent resistance to abrasion, non-polar oils and solvent, water and permeation

(higher acrylonitrile content will be better). NBR also can be used in conditions of dilute acids, alkalis and

salt solution at low temperatures.


Material NBR(Nitrile Rubber/Buna-N)
Advantage 1,Excellent Abrasion-Resistance,Good Rebound Resistance
2,Good Tensile Strength and Elongation
3,Excellent Animal and Vegetable Oil Resistance
4,Good Oil and Fuel Resistance
5,Good Water Resistance
Disadvantage 1,Poor Oxygenated-Solvent Resistance
2,Poor Ozone Resistance
Temperature -40℃-100℃, -50℃-120℃(special formula)
Application 1,Fuel tank, lubricating oil tank and oil in the hydraulic oil, gas, water, silicone grease, silicone oil and other fluid medium rubber parts, especially the sealing parts.
2,It is currently the most widely used, the lowest cost of rubber seals.


Quad Ring Product introduction 


A variation of the standard O-ring, Quad-Rings have an X-shaped cross section suitable for sealing a range

of static and dynamic applications. This provides higher sealing efficiency and lower friction than conventional O-Rings.

Black NBR FKM Rubber Quad Ring For Machinery Seal 0

Black NBR FKM Rubber Quad Ring For Machinery Seal 1

Recommended for low speed reciprocating or oscillatory motion if O-Rings twist.

Provides lower friction than O-Rings and Square Rings.

Quad Ring/X-Rings are interchangeable with O-Ring sizes and glands design.

Available in the same size standards and custom sizes as O-Rings.

Readily available in USA AS568 standard sized NBR Buna-N and FKM.

Not recommended for pressures >500 psi.

Quad Ring/X-Rings may not be available in all compounds.

  Custom size Quad Ring/X-Rings can require a tooling cost in some compounds.


Advantages of Quad-Ring:


Quad-Ring has four definitive sealing advantages over an O-Ring.

Hidden parting lines, or flash lines. The flash lines (a line of excess material where the compression mold tool comes together) on an O-ring is always on the outer most diameter, which consequently is a sealing surface. On a Quad-Ring™, that flash line is on the inside of the two outer lobes; therefore, it does not effect the sealing lips.

The Quad-Ring is more stable in dynamic applications. It is also more resistant to rolling as it has a wider footprint and takes up the corners of the hardware groove. Spiral failure is common in dynamic O-ring applications in which torsion occurs and the ring can extrude or over-yield.

The Quad-Ring has great lubrication retention. The grooves on the inside and outside diameter of the ring retain lubricant, thereby lowering friction and extending packing/seal life.

Less compression force to seal. The multi-lobed design provides more sealing surfaces than an O-ring, all while using the same hardware (Quad-Rings™ are intended to be used in standard O-ring grooves). With these multiple seal points on one ring, less squeeze is required to provide an effective seal. Less friction and wear will ultimately increase service life and reduce downtime.



Q: 1 What kinds of materials can you provide?

FFKM, Liquid Silicone, etc.

Q: 2 How to select the raw compound for my application?
A: With years of experience working with a variety of material, we can help select the material that will best

suit your needs while keeping material costs in mind.

Q: 3 How long can we get the quote?
A: If your information is complete, we will provide the quotation within 24 hours.

Q: 4 Can you provide samples? Is it free or extra?
A: Yes, we can provide samples for free. Freight can be negotiated.


Q: 5 What is the normal lead time for product orders?
A: If the stock generally takes 3-7 days, mold about 10-16 days, no mold about 18-25 days, depending on

the product situation.


Q: 6 How to check the quality of the bulk order?
A: We have incoming inspection, control the quality of raw materials, process inspection,to ensure the quality

of the production process, shipping 100% of the full inspection; automatic inspection machine full inspection,

and according to customer needs before the mass production of pre-production samples.


Q: 7 What is your standard packing?
A: Plastic bag for inner packing .carton box for outer packing also be packed according to customer's requirements.


Q: 8 What's the payment term?
A: We accept T/T 30% deposit and 70% balance against copy of B/L or L/C at sight, West Union,VISA,

Paypal is also accepted.


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