O-Ring Seal
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3. O-Ring Seal
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O-Ring Seal

Product Name: Rubber o ring for sealing
Materials: NBR, HNBR, EPDM, SILICONE, VITON, FLS, FFPM, PTFE
Temperature: NBR(-40~120°C),FFKM(-20~320°C)
Viton(-20~200°C),Silicone (-70~220°C)
EPDM(-50~150°C),PU(-40~90°C)
Hardness: 30-90 shores A
Color: Red, Black, White, blue, green, Clear, etc
Size: Any size, Customized/standard and nonstandard
Customized: OEM & ODM are welcomed
Feature: Resistance to high pressure, oil, weather, abrasion, solvent, high temperature, abrasion resistant, aging resistant, insulation, acid and alkaline resistant

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Product Introduction

TYPES OFSEALING RINGS

Nitrile ButadieneRubber (NBR)

Operating Temperature: -40°C to 120°C

Performance Characteristics: Excellent oil resistance,heat resistance, wear resistana, resistance, and high-pressure oil resistance. Not suitable for polar solventssuch as ketones, ozone, and nitro hydrocarbons.

Main Application Areas: Commonly used in fueltanks, lubricating oil tanks, and fluid media suchas petroleum-based pressure oil, gasoline, water,high-grade grease, silicone oil, diester-basedlubricating oil, and glycol-based hydraulic oil.

Silicone Rubber (VMQ)

Operating Temperature: -70°C to 220°C

Performance Characteristics: Environmentallyfriendly, non-toxic, good elasticity, high tempera-ture resistance, cold resistance, ozone resistance,atmospheric aging resistance, and excellentelectrical insulation performance. However, oil resi-stance and wear resistance are general.

Main Application Areas: Commonly used in sealsor rubber parts for the home applianceindustry, food machinery industry, direct contactwith the human body, children's toys, etc.

O-Ring Seal2

Fluororubber (FKM)

Operating Temperature: -40°C to 260°C

Performance Characteristics: Excellenthigh-temperature resistance, goodchemical solvent resistance (not resistantto ketones, esters), relatively poor coldresistance.

Main Application Areas: Commonly usedin high-temperature, chemical-resistant,oil-resistant working environments,widely used in metallurgy, chemical,automotive, power and other industries.

CustomizedMiscellaneous Parts

Support customization of variousstyles, colors, and specifications.

For orders, please contactcustomer service.

Step 1: Step 2: Measure the I.D. (inside diameter).
Step 2: Measure the O.D. (outside diameter).
Step 3: Measure the cross section. The cross section is the width of the o-ring. When measuring, be careful not to clamp the o'ring too tightly. This will cause displacement, which will give you an inaccurate measurement.
Another way to determine your cross section measurement is with this simple formula:
(OD - ID) ÷ 2.

Viton O ring	Silicone O ring	NBR O ring	HNBR O ring	EPDM O ring	NR O ring	Peoprene O ring
Abbreviation	FKM	silicone	NBR	HNBR	EPDM	NR	Neoprene
Durometer(shoreA)	60-90	30-90	20-95	50-90	30-90	20-90	20-95
Tensile(P.S.I)	500-2000	200-1500	200-3000	2600	500-2500	500-3500	500-3000
Elongation(Max.%)	300	700	600	530	600	700	600
Compression set	good	Good	Good	Excellent	Good	Excellent	Good
Resilience-Rebound	Fair	Good	Good	Excellent	Good	Excellent	Excellent
Abrasion Resistance	Good	Fair to poor	Excellent	Excellent	Good	Excellent	Excellent
Tear Resistance	Good	poor	Good	Excellent	Fair	Excellent	Good
Solvent Resistant	Excellent	poor	Good to excellent	Good	Poor	Poor	Fair
Oil Resistant	Excellent	Fair to poor	Good to excellent	Excellent	Poor	Poor	Fair

Considerations for choosing o-rings have to include these factors:

■ Durometer

Also called Shore A hardness. O-Ring durometer is the hardness of the o-ring material. Typically, o-rings are made of rubber or thermoplastic elastomer. Durometer scales provide numbers 1-100 to define how soft or hard the material is, with 70 being standard. Any Shore A hardness less than 70 is considered a softer material, while greater than 70 is harder.

■ Chemical compatibility

Your material will need resistance to its environment and the chemicals it will be containing. The performance of your o-ring is only as good as your material choice. Consideration here needs to be thoughtful.

■ Pressure compatibility

If the pressure that o-ring seals are subjected to is too high or low, the o'ring will fail to seal adequately. Anything under 100psi is considered too low. The pressure has to be high enough to activate the seal. Here again, material plays a critical role. The most reliable seal is achieved by the component design increasing the o-ring's seal cross-section and reducing the seal durometer.

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