name

Code

Main characteristics

working temperature ℃

Main use

Nitrilo butadiene rubber

NBR

Good oil resistance, and compatible with most mineral-based oil and grease . It does not apply to a phosphate ester series of hydraulic oil and gear oil containing polar? additive, Impatient with aromatic and chlorinated hydrocarbons, ketones, amines, anti-burning liquid HFD.

－40～＋120

used to manufacture O-ring, oil seal, etc. Applied to the hydraulic oil, water and glycol HFC oil-in-water emulsion HFA, HFB, animal fats, vegetable oil, fuel, boiling water, seawater，resist with methane, ethane, propane and butane。

Rubber-plastic Compound

RP

high elastic modulus, high strength. Other properties are same as Nitrilo butadiene rubber.?

－30～＋120

used to manufacture O-ring,Y ring and dust ringetc. Used in sealing of the hydraulic system of engineering machinery .

Fluorine rubber

FKM or FPM

Compatible with temperature, acid? alkali and other chemicals。Grease proof(include phosphate ester series of hydraulic oil)，apply to all lubricants, fuel, hydraulic oil, compounded oil etc. Resistant with? anti-burning liquid HFD, fuel, chain? hydeocarbon, aromatic and chlorinated hydrocarbons and most inorganicacid. But impatient with ketones,amines, anhydrous ammonia, low molecular weight organic acids such as formic acid and acetic acid.

－20～＋200

Feature is its resistance to high temperature, weather , chemical media and? ozone, almost all? mineral-based and synthetic hydraulic oil. But in cases of steam, hot water or low temperature occasions,? has a certain limitations. It has limited? low-temperature performances,media compatibility with the steam and hot water, ?in case of such an occasion, it is necessary to use special fluorine rubber. hydraulic oil seal in? it is wudely used metallurgical, power and other industries as anti-burning? hydraulic oil seal .

Polysiloxane rubbrt

PMQ or MVQ

Heat and cold resistance, compression permanent deformation is small, low mechanical strength, is only applicable to static sealing.

－60～＋230

Apply to sealing of food machinery, electronic products under high and low temperature.

Polyacrylate rubber

ACM

Better heat resistant than NBR，work In? containing lubrication, hydraulic oil, petroleum series hydraulic oil containing polar additives，poor hydraulic resistance。

－20～＋150

used in car oil seal and various gear boxes and? gear case, resist with medium and high-temperature.。

Ethylene-Propylene-Diene Monomer or Elastic Plastic Membrane

EPDM or EPM

Good weather resistant，resist with aging in tha air and weak acid， be resistant with Freon and variety of refrigerant，Does not apply to mineral oil.

－55～＋260

Widely used in refrigerators and refrigeration machinery seale. Steam resistant to 200°C and high-temperature gases to 150 ° C.

polytetrafluoroethylene

PTFE

Chemical stable，good heat,cold ,oil,water,gas, chemicals and variety of media resistance. High mechanical strength，high pressureresistance,good wear resistance，，good self-lubricating. PTFE have squirm and cold flow phenomena，under sustained load deformation? continued to increase as time increase（the phenomenon is closely related to temperature）。pure PTFE is generally not used hydraulic seal material，only filled PTFE can be used，is often filled with bronze powder and fiberglass , these fillers lower coefficient of thermal expansion, improve thermal conductivity capacity, increasing wear resistance，enhance their cold flow (creep) resistance Performance. PTFE has no flexibility，so it is always used in conjunction with the elastomer，they provide the necessary preload to complete a perfect seal.

－55～＋260

Used in the manufacture of sealing ring,? wear ring, the guidance ring (belt),ringetc.it is used to sealing material in machinery. Widely used in almost all industrials such as metallurgical, petrochemical, engineering machinery, light machinery industry .

nylon

PA

good oil ,temperature and wear resistance，high pressure resistance，good shock resistance，but poor dimensional stability.

－40～＋120

used to manufacture? guidance ring ,guide bush , supporting ring,? pressure ring ring, etc..

polyoxymethylene

POM

good oil ,temperature and wear resistance，high pressure resistance，good shock resistance，good self-lubricating properties，good dimensional stability，but poor flexure。

－40～＋140

used to manufacture? guidance ring ,guide bush , supporting ring,? pressure ring ring, etc..

Chlorobutadiene rubbe3r

CR

Anti-aging and antibrine? properties。

－30～＋160

Frequently used in refrigeration industries (such as fluorine 12), Outdoor applications and adhesive industries.

Fluorocarbon silicone rubber

MFQ or FVMQ

good high? and low temperature resistance performance。

－100～＋350

Commonly used in? oil and flame-resistant occasions, such as aerospace.

polyurethane

PU or AU

Have very good mechanical properties，small compression deformation，high tensile strength，very high shear strength、anti-extrusion strength and wearability. In particular, our company use the company imports PU，seal performance is far more effective than domestic products，and the performance almost have no distinction with imported. Mineral oil and grease resistance，resist with below ＋50℃ anti-burning ?HFA and HFB。Impatient with? the water, acid and alkali? above +50 ° C. Hydrolysis polyurethane excluded.

－30～＋110

In the hydraulic system used to create complex sealed, such as Y-shaped ring, U-ring, etc. Widely used in hydraulic cylinder seal of engineering machinery, such as loaders, forklifts, bulldozers, excavators? .