What are the common types of seals and their uses?

Rubber O-ring: It is mainly used for precision sealing and reciprocating motion sealing. When it is used for rotary motion sealing, it is limited to low-speed rotary sealing device. The pressure of fine seal is 0～400Mpa, and the pressure of dynamic seal is 5～35Mpa. O-ring working medium: air, water, mineral oil, crude oil, emulsion, water-glycol, etc. It is mainly suitable for general hydraulic cylinders, general equipment hydraulic cylinders, engineering machinery hydraulic cylinders and high temperature and high pressure cylinders. The materials are nitrile rubber, fluorine rubber, silicone rubber, ethylene propylene rubber, neoprene rubber, butyl rubber, polytetrafluoroethylene, etc.
Y-shaped seal ring: mainly used for reciprocating motion seals that require low friction or want a large gap, and the pressure range is 15-25Mpa. Y-ring working medium: air, mineral oil, water, emulsion, etc. It is mainly suitable for pneumatic and hydraulic systems, such as hydraulic cylinders and pistons and piston rod seals in cylinders. The main materials are fluorine rubber, nitrile rubber, polyurethane rubber, silicone rubber and so on.
V-shaped sealing ring: mainly used for reciprocating motion sealing under high pressure, fast movement speed and large diameter, and the pressure can reach 20～60Mpa. V-ring working medium: lubricating oil, fuel oil, hydraulic oil, air, water, etc., mainly used for sealing cylinders, chemical pipelines, valves, bearings, etc. The materials are mainly nitrile rubber, neoprene, PTFE, Fluorine rubber, FAB, etc.
U-shaped sealing ring: It is mainly used to manufacture reciprocating seals in hydraulic systems, single-acting or double-acting standard hydraulic cylinders of piston rods or pistons, and the pressure is 0～40Mpa. U-ring working medium: lubricating oil, air, mineral oil, water, hydraulic oil, etc. It is mainly suitable for the sealing of hydraulic cylinders, hydraulic cylinders and hydraulic cylinders in construction machinery. The materials are mainly nitrile rubber, cloth rubber, polyurethane rubber Wait.
Rectangular sealing ring: It is mainly installed in a groove with a rectangular cross-section on the outer or inner circle to play a sealing role, with a pressure of 5 ~ 50Mpa. Working medium of rectangular ring: water, air, mineral oil, hydraulic oil, emulsion, etc. It is mainly suitable for two-way reciprocating motion sealing of cylinder and hydraulic cylinder piston. The materials are mainly nitrile rubber, fluororubber, silicone rubber, polytetrafluoroethylene , Ethylene propylene rubber, neoprene, etc.
L-type sealing ring: mainly used for piston sealing of hydraulic and pneumatic equipment, working pressure ≤1.0Mpa. Working medium: liquid, gas, mainly used for general machinery, cylinder, hydraulic cylinder and other seals, the material is PTFE, silicone rubber, fluorine rubber, etc.
J-type sealing ring: mainly used for hydraulic and pneumatic piston rod sealing, working pressure ≤1.0Mpa. Working medium: liquid, gas, mainly used for sealing of engineering machinery oil cylinders, general machinery, cylinders, etc. The materials are PTFE, silicone rubber, fluorine rubber, etc.