China Professional Manufacturer for All Kinds of Rubber Seal Ring

1: What is rubber seal ring
Rubber seal is a common form of a device for preventing leakage of fluid from one part of a container to another, whether dynamic or static. It is also called as rubber ring, rubber sealing. The catagories of rubber seals includes hydraulic seals(piston ring, rod ring, wipers, guide ring, buffer ring...), rotary shaft seal(oil seal, coolant/water seal, V-seals...), o rings and so on. Care is needed in design, since poor tolerances can cause extrusion of the seal under pressure. Material is also critical to performance, the following is the introduction of materials:
Materials
Morgan rubber seal ring Material Includes Nitrile rubber, fluorine rubber, ethylene propylene rubber, neoprene, chloroprene rubber, silicone rubber and so on.
NBR (Nitrile Butadiene Rubber)
Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between 18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the elasticity and compression set are not as good. The NBR has good mechanical properties and good wear resistance. However, its resistance to atmospheric agents and the ozone is relatively low.

Chemical resistanceAliphatic hydrocarbons (propane, butane, petroleum, diesel fuel)
Mineral oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Diluted acids, alkaline and saline solutions for low temperatures
Water (up to +100°C max)Compatibility issueFuels with a high aromatic content
Aromatic hydrocarbons (benzene)
Chlorinated hydrocarbons (trichlorethylene)
Polar solvents (ketone, acetone, acetic acid, ethylene-ester)
Strong acids
Glycol-based brake fluids
Atmospheric and ozone agentsTemperature range-30°C / +100°C (short-term peak at +120°C)
-40°C / +100°C with special NBRs

FKM (fluorinated rubber)
Depending on their structure and fluorine content, fluoroelastomers can vary in terms of chemical resistance and resistance to cold. This FKM-based rubber is very often used for high-temperature hydraulic and pneumatic systems, industrial valves, injection/fuel systems, motor seals and high-vacuum systems.

Chemical resistanceMineral oils and greases, ASTM n°1, IRM 902 and IRM 903 oils.
Fire-resistant liquids (HFD)
Silicone oils and greases
Mineral and vegetable oils and greases
Aliphatic hydrocarbons (propane, butane, petroleum)
Aromatic hydrocarbons (benzene, toluene)
Chlorinated hydrocarbons (trichlorethylene)
Petrol (including high alcohol content)
Atmospheric and ozone agentsCompatibility issueGlycol-based brake fluids
Ammoniac gas
Organic acids with a low molecular weight (formic and acetic acids)Temperature range-20°C / +200°C (short-term peak at +230°C)
-40°C / +200°C with special FKMs

EPDM (Ethylene Propylene Diene Monomer rubber)
As an Ethylene Propylene Diene Monomer copolymer, EPDM is commonly used for hot water taps, cooling systems, brake systems, dishwashers and washing machines.

Chemical resistanceHot water and steam up to +150°C
Glycol-based brake fluids (Dot 3 & 4) and silicone-based brake fluids (Dot 5)
Organic and inorganic acids
Cleaning agents, sodium and potassium alkalis
Hydraulic fluids (HFD-R)
Silicone oils and greases
Polar solvents (alcohols, ketones and esters)
Atmospheric and ozone agentsCompatibility issueMineral oils and greases
Hydrocarbons
Low impermeability to gasTemperature range-45°C / +150°C (short-term peak at +175°C)

HNBR (Hydrogenated Nitrile Butadiene Rubber)
This HNBR-based elastomer is obtained through selective hydrogenation of the NBR's butadiene groups. It is commonly used for power-assisted steering and for air conditioning.

Chemical resistanceAliphatic hydrocarbons
Mineral and vegetable oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Diluted acids, saline solutions and bases for low temperatures
Water and steam up to +150°C
Atmospheric and ozone agentsCompatibility issueChlorinated hydrocarbons
Polar solvents (ketones, esters and ethers)
Strong acidsTemperature range-30°C / +150°C (short-term peak at +160°C)
-40°C / +150°C with special HNBRs

VMQ (silicone rubber: methyl vinyl polysiloxane)
This FVMQ-based rubber is very often used for fuel systems.

Chemical resistanceAnimal and vegetable oils and greases
Moderate water temperature
Diluted saline solutions
Atmospheric and ozone agentsCompatibility issueSuperheated steam up to +120°C
Chlorinated hydrocarbons with a low molecular weight (trichlorethylene)
Aromatic hydrocarbons (benzene, toluene)Temperature range-60°C / +200°C (short-term peak at +230°C)

FVMQ (fluorosilicone rubber)
The FVMQ has mechanical and physical properties that are very similar to those of VMQ. However, the FVMQ offers better resistance to fuels and mineral oils. However, resistance to hot air is not as good as that of VMQ.

Chemical resistanceAromatic mineral oils (IRM 903 oil)
Fuels
Aromatic hydrocarbons with a low molecular weight (benzene, toluene)Temperature range-70°C / +175°C

ACM (Polyacrylate)
Polymers containing ethyl acrylate (or butyl acrylate) have a small amount of monomer, which is necessary for cross-linking; ACM is a material with better heat resistance than NBR. It is often used for automatic gearboxes.

Chemical resistanceMineral oils (motor oils, gear box oils, ATF oils)
Atmospheric and ozone agentsCompatibility issueGlycol-based brake fluids (Dot 3 & 4)
Aromatic and chlorinated hydrocarbons
Water and steam
Acids, alkalis and aminesTemperature range-25°C to + 150°C (short-term peak at +160°C)
-35°C / +150°C with special ACMs

AEM (ethylene acrylate rubber)
As a methyl acrylate and ethylene copolymer, AEM is considered to be better resistant to heat than ACM. Its characteristics make it an intermediary between ACM and FKM.

Chemical resistanceCoolants
Aggressive mineral oils
Atmospheric agents
WaterCompatibility issueAromatic solvents
Strong acids
Brake fluids
Gearbox oils
ATF oilsTemperature range - 40°C à + 150°C

CR (Polychloroprene)
This CR-based elastomer is used in the refrigeration industry and for ventilation systems. This chloroprene was the first synthetic rubber to be developed and marketed.

Chemical resistanceParaffinic mineral oils
Silicone oils and greases
Water and water-based solvents for use at low temperatures
Refrigerant fluids
Ammoniac
Carbon dioxide
Atmospheric and ozone agentsLimited chemical resistanceNaphthenic mineral oils
Aliphatic hydrocarbons (propane, butane, petroleum)
Glycol-based brake fluidsCompatibility issueAromatic hydrocarbons (benzene)
Chlorinated hydrocarbons (trichlorethylene)
Polar solvents (ketone, acetone, acetic acid and ethylene-ester)Temperature range-40°C / +100°C (short-term peak at +120°C)

FFKM (perfluorinated rubber)
FFKM has the best resistance to high temperatures and an excellent chemical inertia. This FKM-based rubber is very often used for high-temperature hydraulic and pneumatic systems, industrial valves, injection/fuel systems, motor seals and high-vacuum systems.

Chemical resistanceAliphatic and aromatic hydrocarbons
Polar solvents (ketones, esters, ethers)
Organic and inorganic acids
Water and steam
High-vacuum systemsProblème de compatibilitéCoolants (R11, R12, R13, R113, R114, etc.)
PFPETemperature range-15°C / +320°C

The table below gives an overview of the physical, chemical and mechanical characteristics for each of the materials.

Characteristics/MaterialsACMAEMCREPDMFFKMFKMFVMQHNBRNBRVMQResistance to abrasion2322424224Acid resistant4322113133Resistance to chemicals4221111222Resistance to cold4222342222Dynamic properties3332324124Electrical properties3332141331Resistance to fire4424112443Resistance to heat1122111121Sealing water1122224224Resistance to oil1324112112Resistance to ozone1121111241Resistance to tearing2331434224Tensile strength3221213124Resistance to water / steam4431233123Resistance to atmospheric agents1111111231

2. Application Range
Applied in the hyraulic cylinder, rotary shaft, transmissions of heavy-duty machine and rolling mill, increase the (sealing lip) radial force on the axis of rotation by stretched spring. Sealing medium can be applied to provide adequate lubrication.

3. Characteristics
1- good chemical resistance;
2- good resistance to high and low temperature properties
3 -good corrosion resistance to ozone and climate adaptation
4- high wear resistance
5- low friction
6- low permanent deformation characteristics
7- excellent elasticity

4: Production Line and Warehouse:
Morgan seals had the biggest vulcanizing machine(4000T) and different kinds of seal moulds. So for the non standard rubber seals and rubber parts, please do not hesitate to contact with us. The following is the the picture of our production line and warehouse.
5:Cases:

Morgan seals is the supplier of many famous customer, such as the Siemens Primetals, Baosteels .... The largest rubber seal we produced is the sealing ring for Three Gorges Damn water-turbine generator(OD is 13000mm).
6: Our services:
Guangzhou Morgan Seals Co., Ltd the expert in sealing solution field who combines the rich seals research and production experience of her parent firm with the advanced technology and administration of Morgan, Worcester. Morgan Seals Research and Development ability is based on her parent firm who has won awards as scientific research achievements for more than 1000 projects and over 200 of them won scientific and technological progress prizes of municipal, provincial, ministerial and national levels. At the same time, it also has one National Certified Laboratory, one National Engineering Research Centers and three Industry Level Inspection Centers.