I. standard O ring /O-RING
O ring friction resistance is small, static and dynamic friction equal, is the "0" shape rubber ring friction 1/2 - 1/4, can eliminate low-speed, low pressure movement of "crawling" phenomenon.
O ring high wear resistance, sealing surface wear, automatic elastic compensation function.
O ring has good self lubrication performance. It can be used as oil-free lubrication seal.
The O ring is simple in structure and easy to install.
Ring type O working pressure: 0-300MPa; working speed: 15m/s; working temperature: -55-250 degrees.
O ring applicable medium: hydraulic oil, gas, water, mud, crude oil, emulsion, water, ethylene glycol, acid.
Two, the use of standard O rings
O - shaped sealing ring is suitable for all kinds of mechanical equipment, in the specified temperature, pressure, as well as in different liquid and gas medium, in the static or moving state of sealing. In machine tools, automobiles, ships, aerospace equipment, metallurgical machinery, chemical machinery, engineering machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and all kinds of instruments and meters, a large number of applications of various types of the sealing element. O type sealing ring is mainly used for static sealing and reciprocating sealing. For rotary motion seals, it is limited to low speed rotary seals. O type sealing ring is generally installed in the outer circle or inner circle, the cross section of the rectangular groove, sealing role. O type sealing ring in the oil, acid and alkali, grinding, chemical erosion and other environments still play a good sealing, damping effect. Therefore, the O ring is the most widely used seal in hydraulic and pneumatic transmission systems.
Two, the standard O ring, O type sealing ring compared with other types of sealing ring, has the following advantages:
Suitable for all kinds of seals: static seal and dynamic seal
- it is suitable for various purposes, materials, sizes and grooves are standardized, and interchangeability is strong
- suitable for a variety of modes of motion: rotational motion, axial reciprocating motion, or combined motion (e.g., rotational, reciprocating, combined motion)
- suitable for a wide variety of sealed media: oil, water, gas, chemical media, or other mixed media
- through the selection of suitable rubber materials and proper formulation design, the oil, water, air, gas and various chemical mediums can be effectively sealed. The range of temperature is wide (- 60 DEG C + 220 DEG C), and the pressure can reach 1500Kg/cm2 when used in fixed use.
- simple design, compact structure, convenient assembly and disassembly
Three, the standard O ring and O ring section structure is extremely simple, and has the self sealing function, the sealing performance is reliable.
Because the O ring itself and the installation site structure are extremely simple and standardized, the installation and replacement are very easy. Many varieties of materials, can be selected according to different fluid: nitrile rubber (NBR) and fluorine rubber (FKM), silicone rubber (VMQ) and ethylene propylene rubber (EPDM) and chloroprene rubber (CR), butyl rubber (BU), polytetrafluoroethylene (PTFE), natural rubber (NR) etc. - low cost - friction resistance is relatively small