{"id":830,"date":"2025-03-17T10:14:33","date_gmt":"2025-03-17T02:14:33","guid":{"rendered":"https:\/\/hengoseal.com\/?p=830"},"modified":"2025-08-04T16:09:00","modified_gmt":"2025-08-04T08:09:00","slug":"what-are-o-rings-how-they-work","status":"publish","type":"post","link":"https:\/\/hengoseal.com\/uk\/what-are-o-rings-how-they-work\/","title":{"rendered":"What Are O-Rings? Functions, Materials, and How to Choose the Right One"},"content":{"rendered":"

Ever wondered how a small rubber ring can prevent a high-pressure hydraulic system from leaking? That\u2019s the power of an \u0443\u0449\u0456\u043b\u044c\u043d\u044e\u0432\u0430\u043b\u044c\u043d\u0435 \u043a\u0456\u043b\u044c\u0446\u0435<\/strong> \u2014 compact yet crucial, simple yet essential. <\/p>\n

\u043d\u0430 HENGOSEAL<\/strong>, we\u2019ve been manufacturing and exporting industrial-grade O-rings to over 20 countries. Whether your application involves hydraulic cylinders, pneumatic equipment, or automotive engines, choosing the right O-ring can make or break performance.
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What Is an O-Ring and How Does It Work?<\/h2>\n

\u0410\u043d \u0443\u0449\u0456\u043b\u044c\u043d\u044e\u0432\u0430\u043b\u044c\u043d\u0435 \u043a\u0456\u043b\u044c\u0446\u0435<\/strong> is a circular elastomer seal that blocks the passage of fluids or gases between mechanical parts. When compressed in a groove between two surfaces, it deforms to create a tight seal that resists pressure, temperature changes, and vibration. <\/p>\n

In hydraulic systems, this deformation is the key to leak-free operation. You can learn more about their role in fluid power systems in our \u041a\u0435\u0440\u0456\u0432\u043d\u0438\u0446\u0442\u0432\u043e \u043f\u043e \u0433\u0456\u0434\u0440\u0430\u0432\u043b\u0456\u0447\u043d\u043e\u043c\u0443 \u0443\u0449\u0456\u043b\u044c\u043d\u0435\u043d\u043d\u044e<\/a>.<\/p>\n


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How to Select the Right O-Ring Material for Your Application?<\/h2>\n

Material selection impacts temperature resistance, chemical compatibility, and lifespan. Here\u2019s a quick reference:<\/p>\n\n\n\n\n\n\n\n\n
\u043c\u0430\u0442\u0435\u0440\u0456\u0430\u043b<\/th>\n\u0414\u0456\u0430\u043f\u0430\u0437\u043e\u043d \u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440 (\u00b0C)<\/th>\n\u041a\u043b\u044e\u0447\u043e\u0432\u0456 \u0441\u0438\u043b\u044c\u043d\u0456 \u0441\u0442\u043e\u0440\u043e\u043d\u0438<\/th>\n\u0417\u0430\u0433\u0430\u043b\u044c\u043d\u0456 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u0438<\/th>\n<\/tr>\n<\/thead>\n
NBR (\u043d\u0456\u0442\u0440\u0438\u043b)<\/a><\/td>\n-40 \u0434\u043e 120<\/td>\n\u0412\u0456\u0434\u043c\u0456\u043d\u043d\u0430 \u043c\u0430\u0441\u043b\u043e\u0441\u0442\u0456\u0439\u043a\u0456\u0441\u0442\u044c, \u0435\u043a\u043e\u043d\u043e\u043c\u0456\u0447\u043d\u0430 \u0435\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u0456\u0441\u0442\u044c<\/td>\n\u041f\u0430\u043b\u0438\u0432\u043d\u0456 \u0441\u0438\u0441\u0442\u0435\u043c\u0438, \u0433\u0456\u0434\u0440\u0430\u0432\u043b\u0456\u043a\u0430<\/td>\n<\/tr>\n
FKM (Viton\u00ae)<\/a><\/td>\n-20 \u0434\u043e 230<\/td>\nHigh temperature and chemical resistance<\/td>\nAerospace, engines<\/td>\n<\/tr>\n
EPDM<\/a><\/td>\n-50-150<\/td>\nWeather, ozone, and steam resistance<\/td>\n\u041d\u0430 \u0432\u0443\u043b\u0438\u0446\u0456, \u041e\u0412\u041a<\/td>\n<\/tr>\n
PTFE<\/a><\/td>\n-200-260<\/td>\nChemically inert, food-grade<\/td>\nMedical, food, laboratory<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

If you\u2019re unsure which to choose, see our detailed Silicone vs FKM O-Rings Comparison<\/a> for complex environments.<\/p>\n


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How Do You Measure O-Ring Sizes Correctly?<\/h2>\n

For the perfect fit, always measure: <\/p>\n