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USH is a shaft hole universal sealing ring, which is generally used in hydraulic cylinders and general-purpose hydraulic cylinder CPUs for the sealing of pistons in reciprocating hydraulic cylinders.
MATERIAL COMPARE
Material | Advantages | Temperature range | Hardness |
NBR | 1.Excellent resistance to oils ; 2.Good abrasion resistance ; 3.often used in the manufacture of all kinds of oil resistant gaskets, seals and so on | 40-90 Shore A | |
1.High chemical stability,Good oil resistance; 2. excellent resistance in mineral oils and fats; 3. use in mechanical devices requiringmaximum resistance to elevated temperatures,and many special medium,high vacuum applications, such as automobile, vacuum equipment and so on; | 52-92 Shore A |
Material | NBR, FKM |
Color | Black Brown |
Function | piston and rod seal,oil seal,U sharp seal |
Media | Hydraulic oils (mineral oil-based) |
Pressure | ≤ 21Mpa ,over 21Mpa use a back-up ring |
Temperature | NBR:-40°C~100°C FKM:-20~+200°C |
Application | Pump, Car, motor,Electrical equipment, Bearings,machinery, Hydraulic Cylinder |










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