O-Ring Technical requirements:
Appearance meets GB/T3452.2-2007 Material meets HG/T2579-2008 Size meets GB/T3452.1-2005
In addition, all our products are ROHS and REACH Compliant (we mainly export products to USA and Europe market).
O-Ring Features:
1. Good sealing solution, long service life.
2. Easy installation reduces risk.
3. Working in various medium based on different elastomer material.
Silicone O-Ring (MQ, VMQ, PVMQ) Material Description
Physically, silicone o-rings are based on silicon, an element derived from quartz. To create this class of synthetic
elastomers, pendant organic groups such as methyl, phenyl, and vinyl are attached to silicon atoms. Different
additions of side chains can achieve significant variations in properties. Silicone o-rings have excellent heat, ozone,
and corona resistance and have good dielectric stability and resistance to many oils, chemicals, and solvents.
Silicone o-rings maintain the best flexible properties at low temperatures but have low tensile strength and low
wear and tear resistance.
Silicone o-rings may also come in a metal detectable variation, while retaining the same qualities as the general
silicone o-ring compound. RUICHEN Sealing supplies silicone o-rings that are compliant with FDA standards, and
are suitable for use in food and beverage production lines, as well as medical and pharmaceutical manufacturing.
Both silicone and metal detectable silicone o-rings meet FDA compliance.
Preferred Environments to Use Silicone O-Rings
Performs Well In:
· Engine and transmission oil (mineral oils)
· Diluted salt solution
· Moderate water
· Dry heat
· Ozone and weather resistance
Doesn't Perform Well In:
· Concentrated acids and alkalis
· Steam over 120ºC (248ºF)
· Petroleum oils and fuels
· Ketones
Feature |
Value |
ISO designation |
VMQ |
Chemical name |
Silicone rubber |
Cross-linking |
Peroxide cross-linked |
Trade names |
Silicone, Silicone |
Media resistance |
Medium media resistance |
Temperature resistance |
-60°C to +200°C |
Standard color |
Red |
Standard hardness |
70 Shore A |
Industries |
Food industry, gas/water installation |
Production |
Compression molding and injection molding |
Tolerances |
DIN ISO 3601 |
Durability |
10 years |
We can supply material as NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, ACM ,SBR , FLS , etc...
What's Each Rubber's Typical Features ?
NBR Rubber Features:
Nitrile rubber (NBR, Buna-N) provides excellent resistance to petroleum oils as well as mineral and vegetable oil.
Nitrile rubber also offers strong resistance to heat aging - often a key advantage over natural rubber.
Nitrile rubber performs well in carburetor and fuel pump diaphragms, aircraft hoses, seals and gaskets as well as
oil-lined tubing. Due to its versatility, nitrile is used in applications involving not only oil and fuel resistance, but
those applications requiring resistance to heat, abrasion, water, and gas permeability.
EPDM Rubber Features:
EPDM rubber is a high density rubber primarily used for outdoor applications. It has dynamic and mechanical
properties between natural rubber and synthetic rubber.
Do not use EPDM if continual contact with petroleum based products is required.
Not recommended for usage in food applications or those that are exposed to aromatic hydrocarbons.
HNBR Rubber Features:
Hydrogenated Nitrile Butadiene Rubber (HNBR), also known as Highly SaturatedNitrile (HSN), is special class of nitrile
rubber (NBR) that has been hydrogenated to increase saturation of the butadiene segment of the carbon polymer
backbone. Subsequent improvements to the material properties, over that of a nitrile rubber (NBR), include greater
thermal stability, broader chemical resistance, and greater tensile strength.
HNBR is classified by ASTM as a DH-type polymer. This classification indicates 150ºC service temperature as well as less
than 30% swell in IRM 903 oil. HNBR can be formulated to meet application temperatures ranging between -50°C and 165ºC.
SBR Rubber Features:
1.Main materials: Styrene-butadiene rubber (SBR), a general-purpose synthetic rubber,produced from a copolymer of
styrene and butadiene. Exceeding all other synthetic rubbers in consumption, SBR is used in great quantities in automobile
and truck tires, generally as an abrasion-resistant replacement for natural rubber (produced from polyisoprene).
2.Available place: They are widely used in automobile, electrical appliances, building vibration isolation and other industry.
For example, air blower, water pump, instrument, measuring of ships and so on.
3.Main performance: SBR has similar chemical and physical properties to natural rubber, with generally better abrasion
resistance,outstanding strength,good creep and stress relaxation resistance and low cost,etc. It is not recommended to
use SBR in applications that involve ozone, strong acids, oils, greases, fats and most hydrocarbons.
Neoprene Rubber Features:
Neoprene Rubber, also known as neoprene polychloroprene, is an extremely versatile synthetic rubber with more than 75
years of proven performance.
In the automotive world, neoprene is used for many under-the-hood and underbody parts that require a reasonably priced,
mid-performance polymer with a good all-around balance of performance properties.
Natural Rubber Features:
Natural rubber was originally derived from latex found in the sap of rubber trees. The purified form of natural rubber can
also be produced synthetically. Natural rubber is an ideal polymer for dynamic or static engineering applications.
Caution: Natural rubber is not recommended for applications where the rubber part will be exposed to ozone, oils, or solvents.
PU/Polyurethane Rubber Features:
Polyurethane is an organic polymer. Polyurethanes are formed by reacting a polyol (an alcohol with more than two reactive
hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives.
Polyurethane is a widely used compound due to its superior strength, tear and abrasion resistance. Polyurethane also provides
excellent permeation resistance.
Features:
- Good hydraulic oil and gasoline resistance
- Resistant to pure aliphatic hydrocarbons (propane, butane, fuel)
- Resistance to mineral and silicone oils and greases
- Resistant to water, oxygen, ozone and aging
- Excellent tear and abrasion resistance
- Available in multiple types and compounds to meet performance and cost requirements
We have certificates :ISO 9001:2015 , ISO 14001:2015 ,ISO 45001:2018 , IATF , FDA, REACH, ROHS, SGS etc.
IATF 16949 2016.pdf
ISO 9001 2015.pdf
ISO45001.pdf
ISO 14001.pdf
SIL-ROHS CANEC23015740921(SZP23-030677).pdf
SIL-REACH CANEC23015740923(SZP23-030677).pdf
SIL-FDA CANEC23015737709(SZP23-030799).pdf
For color , we can make as customers' requirements .Below table is the colorful o rings
we made.If you need colored o rings , you can give me pantone number .

1. Since 2006, focus on rubber seals, especially for auto parts
4. Molds > 10000 sets, especially o rings, about 5000 sets.
5.O-ring series covers American standard (AS568), Japanese standard (JIS), national
standard(GB), and produces a large number of customized non-standard parts.
6. Material: NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, SBR .The rubber materials
7. Material Certificates: FDA, ROHS, REACH, UL157, CP65 WRC, EN549,EN45545.
8. Products are widely used in automotive parts, electronic connectors, valves, pneumatics,
power tools, new energy, medical equipment, electronic products and other fields.
9. company has introduced HRP, ERP and other systems since its inception.
10. The company's labor cost, raw material procurement, production process and
product quality were comprehensively and scientifically controlled.