O-ring is suitable for all kinds of mechanical equipment, in the specified temperature, pressure, and different liquid and gas media, in static or moving state to play a sealing role. In machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, engineering machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, as well as various instruments and meters, a large number of types of sealing elements are applied. O-ring is mainly used for static seal and reciprocating seal. It is used for low-speed rotary sealing device when rotary motion seal is used. O-ring is generally installed in the groove with rectangular section on the outer circle or inner circle to seal. O-ring still plays a good role in oil, acid and alkali resistance, grinding, chemical erosion and other environments. Therefore, O-ring is the most widely used seal in hydraulic and pneumatic transmission system.
Compared with other sealing rings, O-ring has the following advantages:
--Suitable for a variety of sealing forms: static sealing and dynamic sealing
It is suitable for all kinds of materials, and its size and groove are standardized, with strong interchangeability
--Suitable for multiple motion modes: rotary motion, axial reciprocating motion or combined motion (such as rotary reciprocating combined motion)
--Suitable for a variety of different sealing media: oil, water, gas, chemical media or other mixed media
By choosing the right rubber material and the right formula design, it can effectively seal oil, water, air, gas and various chemical media. The temperature range is wide (- 60 ℃ ~ + 220 ℃), and the fixed pressure can reach 1500kg / cm2 (used together with reinforcing ring).
--Simple design, small structure, easy to install and disassemble
O-ring has simple section structure, self sealing function and reliable sealing performance.
As the O-ring itself and its installation parts are simple and standardized, it is very easy to install and replace.
--Materials: NBR, FKM, VMQ, EPDM, Cr, Bu, PTFE, NR, etc
--Low cost
--The dynamic friction resistance is relatively small
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