Add time：15-08-25 14:28:09    Excerpt：www.othchina.net

　　O-Ring Overview

　　1.O-ring Specifications

　　O-ring specifications are UHSO-ring model specifications, UHPO-ring size, UNO-ring size, DHO-ring size, piston O-ring size, high temperature O-rings, high pressure O-rings, corrosion-resistant O- ring, wear-resistant O-ring.

　　2.O-ring Application Description:

　　Hole YX-type O-ring Application: hydraulic cylinders for reciprocating the piston seal. Scope: TPU: general Hydraulic cylinder, general-purpose equipment hydraulic cylinder. CPU: construction machinery with hydraulic cylinders and high temperature, high pressure cylinder. Material: Polyurethane TPU, CPU, rubber.

　　Hardness: HS85 ± 2 ° A Temperature: TPU: - 40 ~ +80 ℃, CPU: -40 ~ +120 ℃ Working pressure: ≤ 32Mpa Working Medium: Hydraulic oil emulsion.

　　YX-type O-rings block the hole with a Purpose: This standard applies to tank when working pressure greater than 16MPa with YX-ring use, or cylinder eccentric force, the role of the protective seal Working temperature: -40 +100 degrees. Working medium: hydraulic oil, emulsion, fish hardness: HS 92 ± 5A Material: Teflon. Shaft O-ring type with YX Usage: reciprocating hydraulic cylinder piston rod seal in scope: TPU: general Hydraulic cylinder, general-purpose equipment hydraulic cylinder. CPU: construction machinery with hydraulic cylinders and high temperature, high pressure cylinder. Material: Polyurethane TPU, CPU, rubber hardness: HS85 ± 2 ° A Temperature: TPU: - 40 ~ +80 ℃ CPU: -40 ~ +120 ℃ Working pressure: ≤ 32Mpa, working medium: hydraulic oil, emulsions. O-ring sealing performance, high working life, the dynamic pressure of sealing products, rubber seal life than conventional 5-10 times higher, up to several times, under certain conditions, sealed the substrate with the same life. O-ring friction is small, dynamic and static friction are equal, is "0" shaped rubber ring friction 1/2-1/4, to eliminate low speed, low pressure movement of the "crawling" phenomenon. High wear-resistant O-ring sealing surface with automatic wear compensation elasticity. O-ring good self-lubricating properties. Can be used for oil-lubricated seal. O-ring structure is simple, easy to install. O-ring operating pressure :0-300MPa; working speed: ≤ 15m / s; working temperature: -55-250 degrees. O-ring for media: hydraulic oil, gas, water, mud, oil, emulsion, water - ethylene glycol, acid.

　　3.O-ring advantage

　　O-ring seals and other types of comparison, has the following advantages: - for a variety of seals in the form: static seals, dynamic seals materials for various purposes, sizes, and grooves have been standardized, interchangeable - for more kinds of movement pattern: rotation, axial reciprocating movement or combination of movements (such as rotary reciprocating motion combined) - for a variety of sealing medium: oil, water, gas, chemical, or other media, mixed media by appropriate choice of materials and rubber appropriate formulation, to achieve the oil, water, air, gas and chemical media and effective seal. Wide temperature range (- 60 ℃ ~ + 220 ℃), fixed up the pressure when used 1500Kg/cm2 (with the reinforcement ring and use). - Design a simple, compact, easy assembly and disassembly O-ring cross-section structure is extremely simple, and there is self-sealing, sealing performance and reliable. As the O-ring and install parts of the structure itself is extremely simple, and has become standardized, so installation is very easy to replace. - Material varieties can be selected according to different fluid: a nitrile rubber (NBR), Viton (FKM), silicone rubber (VMQ), ethylene-propylene rubber (EPDM), chloroprene rubber (CR), butyl rubber (BU), polytetrafluoroethylene (PTFE), natural rubber (NR), etc. - low cost - a relatively small dynamic friction

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