[Chinese-English version] performance features of sealing materials main application place

[Chinese-English version] performance features of sealing materials main application place


[Chinese-English version] performance features of sealing materials main application place







Nitrile –






has good wear resistance, air permeability and oil resistance, and is suitable for hot water in mineral hydraulic oil, grease, silicone oil, flame retardant liquid and 80 ℃. It is not suitable for polar solvent and brake fluid. Ozone Resistance and weather resistance are general, but this will not affect the general seal because it is installed in the cylinder. Xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0


Good mechanical technological parameters,e.g. high abrasion resistance, low gas permeability and good resistance to mineral oil based lubricating oils and greases, hydraulic oils,highlynon-flammable hydraulic fluids HFA, HFB, HFC, silicone oils and greases, water up to approx. 80°C.NBR is generally not resistant to polar solvents, glycol-based brake fluids and highly non-flammable hydraulic fluids HFD. It has a low resistance to ozone, weathering and ageing. In most hydraulic applications this has no effect because the hydraulicseals are installed internally in the hydraulic components.




Because of its good comprehensive mechanical performance and good oil resistance, it is the most widely used


Hydraulic sealing materials for general use.


NBR is frequently used in the hydraulic field due to its good mechanical characteristics and resistance to mineral oil based lubricating oils and greases.






High temperature resistance and medium resistance are good, and good resistance can still be maintained even at high temperature


Medium and compression-resistant deformation.


FKM is a fluorocarbon elastomer with high thermal and chemical


resistance.Its broad spectrum of resistance and relatively good


compression set, even at high temperatures.




Flame retardant, good air permeability. Applied to high temperature, ozone resistance and


Occasions with high Hou resistance requirements.


FKM is known especially for its non-


flammability, low gas permeability and excellent


resistance to ozone, weathering and aging.




High mechanical strength, wear resistance, extrusion resistance, high pressure resistance, tear resistance, strong tear resistance


High degree. Good elasticity and ozone resistance


PU materials display higher mechanical strength,high abrasion, wear and extrusion resistance, high pressure load capacity,as well as a high tear and elongation at break resistance. Also have good flexibility xa0and very good ageing and ozone resistance.




Widely used in mineral hydraulic oil, silicone oil, HFA/HFB type


Flame retardant solution, some grades are suitable for hot water up to 50 °c.


PU materials are suitable for application in


mineral oils and greases,hydraulic oils, silicone


oils and greases, highly non-flammable hydraulic fluids HFA and HFB and water up


to 50°.








Wear resistance, extrusion resistance and low temperature resistance are good, and the product has good dimensional stability and moisture absorption resistance.


Have high wear resistance, good low temperature resistance and high pressure load and extrusion resistance. In addition rubber fabric hydraulic seals are inherently very dimensionally stable and have a low moisture expansion tendency in hydraulic media.




Especially suitable for heavy duty environment.


Particularly well suited for rough application


conditions, such as in mobile hydraulics or other


heavy duty applications.






Or (Or)


Good heat resistance, good dielectric properties, good low temperature elasticity, Hou resistance, ozone resistance and UV resistance


Okay. Generally not suitable for mineral oil. Xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0xa0


VMQshows excellent heat resistance, cold flexibility,dielectric properties and especially good resistance to weather, ozone and UV rays.Not suitable for oil based fluid.




It is widely used in food and low temperature environment.


xa0Foodstuff and cryogenic engineering.


Polypropylene rubber






Excellent resistance to ozone, weather and heat-resistant air, general mechanical strength, elasticity and resistance


Low temperature is not good.


ACM shows excellent resistance to ozone, weathering and hot air, although it shows only a medium physical strength,low elasticity and a relatively limited low temperature capability.




Mainly suitable for cars with extreme pressure additives in high temperature environment


Use grease.


ACM materials are mainly used in automotive applications which


require special resistance to lubricants containing many additives


(incl. sulfur) at high temperatures.


EPDM rubber






Diene Rubber


Or (Or)


Good heat resistance, ozone resistance and weather resistance, good elasticity, low temperature performance and insulation performance.


EPDM shows good heat, ozone and aging resistance. In addition they also exhibit high levels of elasticity, good low temperature behavior as well as good insulating properties




Commonly used in brake fluid and hot water environment.


EPDM can often be found in applications with


brake fluids (based on glycol) and hot water.


Hydrogen-coated rubber










Good comprehensive mechanical performance. The temperature used in mineral oil is-30-1 40 ℃, which can be used in a short time.


Up to 160 °c.Some grades can reach low temperature resistance-40 °c.


HNBR shows good mechanical properties.The operating temperature of HNBR ranges between -30°C and +140°C(for a short period of time up to +160°C) in contact with mineral oils.Special types can be used down to -40°C.




Mineral oil suitable for high temperature environment.


Mainly use in mineral oil at high temperature.






Xa0xa0xa0xa0xa0xa0 is ozone-resistant, Hou-resistant, chemical-resistant, and has good flame resistance, low temperature performance and mechanical strength.


In general the CR materials show relatively good resistances to ozone, weathering, chemicals and aging.Also they show good nonflammability, good mechanical properties and cold flexibility.




Used in the refrigeration industry and outdoors.


CR materials are found in sealing applications such as refrigerants, for outdoor applications.








Pure PTFE can withstand almost all hydraulic Media, solvents and various chemical media, with extremely low friction coefficient and no crawling phenomenon.Ozone Resistance, excellent weather resistance and flame resistance.In order to improve its cold resistance, filling materials are usually added when the seal is manufactured.


PTFE display almost universal chemical resistance,an extremely low friction value which results in very good sliding characteristics, no stick-slip effect,particular rigidity and almost unlimited ozone, weathering and ageing resistance. PTFE is impervious to almost all known hydraulic media, lubricants,chemicals and solvents.PTFE is non-flammable and so does not constitute an additional hazard in case of fire.Pure PTFE is not totally without disadvantages as it has a tendency to cold flow or crawl under pressure load.These weaknesses are counteracted by the use of seal compounds mixed with fillers.




Pure PTFE is especially suitable for the food, beverage and pharmaceutical industries.


Filled PTFE is suitable for almost all working conditions.


The elastic body or spring is used in conjunction with it, and it is widely used.


Used in hydraulic, compressor, chemical and other industries.


Pure PTFE is particularly suitable for food and


beverage applications, pharmaceuticals and


medical application areas. PTFE is not or only


slightly elastic. For this reason, PTFE seal


elements are activated by elastic energising


elements in the form of o-rings or stainless steel springs. xa0Compounds filled with bronze for example, give PTFE the ability to adapt to most application conditions.




Good anti-wear performance.It has the characteristic of volumetric expansion after moisture absorption.


PA has a good wear resistance.Water absorption and resulting change


in volume can be catered for by increasing housing tolerances.




It is commonly used in making wear rings and retaining rings of large specifications.


PA is a high-molecular polyamide from which


even large elements can be produced


economically,is used for large bearings and


support rings.




Good sliding performance, good dimensional stability, resistance and water absorption.


Excellent sliding characteristics, particularly in the dry-running range


of the bearing element.The material is tough and maintains good


stability of shape at different temperatures. Its chemical structure also


gives it high resistance to various fluids with low water absorbtion.




It is especially suitable for making guiding elements and retaining rings.


Particularly suitable for the functions which


guide rings and back-up rings are required to




Ultra high molecular weight polyethylene


Utra High Molecular


Weight Polyethylene


Excellent wear resistance.


Excellent wear and abrasion resistance.


-160~ +100℃


Commonly used in water and low temperature conditions.


Best in aqueous solutions and cryogenic




Phenolic Resin






C380 or


Composed of fiber and resin, the product has a long life, small friction resistance, elasticity and resistance


Good water absorption resistance.


With the selection of the optimal material combinations (fabric/resin), a


long product life, high restoring force, low friction and very high


contact pressure (load capacity) can be achieved. No moisture


expansion in water; or measurable absorption of water.




For occasions with high load and shear force, such as heavy load wear resistance


Selected for application areas in hydraulics with


high loads and shear forces,heavry duty wear


ring for example.