Choose the material by medium按介质选材质
| Material材质 | Good with适用介质 | Not suitable for不适合 | Typical range参考温度 |
|---|---|---|---|
| NBR丁腈 NBR | Mineral oil, fuel, hydraulic oil, water矿物油、燃油、液压油、水 | Ozone, strong acids, brake fluid臭氧、强酸、制动液 | -30 to 100 °C-30 ~ 100 °C |
| EPDM三元乙丙 EPDM | Hot water, steam, brake fluid, weather热水、蒸汽、制动液、耐候 | Mineral oil and fuel矿物油、燃油 | -50 to 130 °C-50 ~ 130 °C |
| FKM氟橡胶 FKM | High temperature, oils, many chemicals高温、油品、多种化学品 | Hot water/steam, ketones热水蒸汽、酮类 | -20 to 200 °C-20 ~ 200 °C |
| Silicone硅橡胶 | Food, medical, wide temperature食品、医疗、宽温域 | Oils, high wear油品、高磨损 | -60 to 200 °C-60 ~ 200 °C |
| PTFE-coated / PTFE四氟包覆 / 四氟 | Aggressive chemicals强腐蚀介质 | Dynamic high-elasticity needs需高弹性的动态场合 | -60 to 260 °C-60 ~ 260 °C |
Figures are typical industry reference values. Final selection depends on your actual operating conditions; contact us to confirm.数据为行业常见参考值,最终选型以实际工况为准,欢迎联系我们确认。
Sizing and standards尺寸与标准
O-rings are specified by inside diameter and cross-section. Common standards include AS568 (inch), ISO 3601 and GB/T 3452.1 (metric). Hardness is usually 70 Shore A unless pressure or extrusion requires harder.
O型圈以内径和线径标注。常见标准有 AS568(英制)、ISO 3601 和 GB/T 3452.1(公制)。硬度一般为邵氏 70A,高压或有挤出风险时选更硬。
Not sure of the size? Send the old O-ring or a groove drawing and we will match it.
不确定尺寸?发旧O型圈或沟槽图纸,我们帮您匹配。
FAQ常见问题
What do I need to order an O-ring?订购O型圈需要提供什么?
Inside diameter × cross-section (for example 50 × 3.5 mm) or the standard size code, plus material, hardness and quantity.内径×线径(如 50×3.5 mm)或标准规格代号,以及材质、硬度和数量。
Can I use an NBR O-ring with hot water?丁腈O型圈能用于热水吗?
Not recommended. EPDM is the usual choice for hot water and steam; NBR suits oils and fuels.不建议。热水和蒸汽通常用三元乙丙;丁腈适合油品和燃油。
Need help choosing?需要选型帮助?
Send your medium, temperature, pressure and size. We will recommend a material and quote.
把介质、温度、压力和尺寸发给我们,我们给出材质建议并报价。
Request a quote获取报价 WhatsApp