{"id":675,"date":"2025-02-26T12:00:29","date_gmt":"2025-02-26T04:00:29","guid":{"rendered":"https:\/\/hengoseal.com\/?p=675"},"modified":"2025-04-24T10:30:22","modified_gmt":"2025-04-24T02:30:22","slug":"buna-o-rings-guide","status":"publish","type":"post","link":"https:\/\/hengoseal.com\/vi\/buna-o-rings-guide\/","title":{"rendered":"Buna O Rings: How to Choose the Right One for Oil & Chemical Sealing?"},"content":{"rendered":"

I once struggled with seal failure in oily machinery \u2014 then I discovered Buna O-rings<\/strong>, and things changed.<\/p>\n

These affordable and reliable seals resist oils, fuels, and water. But how do you know which Buna ring to choose for your system?<\/p>\n

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Let\u2019s explore everything from material benefits to size selection, common uses, and how Buna compares to Viton and NBR.<\/p>\n

What makes Buna O-rings ideal for industrial sealing?<\/h2>\n

Buna O-rings are made from NBR (nitrile rubber), known for its resistance to oils, greases, and hydrocarbons.<\/p>\n

These seals offer excellent performance in automotive, hydraulic, and fuel systems \u2014 without the cost of exotic materials.<\/p>\n

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T\u00e0i s\u1ea3n<\/th>\nBuna (NBR) Performance<\/th>\n<\/tr>\n<\/thead>\n
Ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9<\/td>\n-40\u00b0C to 121\u00b0C<\/td>\n<\/tr>\n
Oil resistance<\/td>\nHigh \u2014 ideal for petroleum-based fluids<\/td>\n<\/tr>\n
Abrasion strength<\/td>\nStrong for dynamic sealing applications<\/td>\n<\/tr>\n
Cost-efficiency<\/td>\nVery affordable vs Viton or FFKM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Want a size guide? Explore our full Metric Buna O-Rings chart<\/a> to find your fit.<\/p>\n

What\u2019s the difference between Buna and Viton O-rings?<\/h2>\n

Buna works great for most petroleum applications, but Viton<\/strong> is better for aggressive chemicals and high heat.<\/p>\n

Here\u2019s a quick comparison:<\/p>\n\n\n\n\n\n\n\n\n
T\u00ednh n\u0103ng<\/th>\nBuna (NBR)<\/th>\nViton (FKM)<\/th>\n<\/tr>\n<\/thead>\n
Temp. range<\/td>\n-40\u00b0C to 121\u00b0C<\/td>\n-26\u00b0C to 204\u00b0C<\/td>\n<\/tr>\n
Oil resistance<\/td>\nCao<\/td>\nXu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n
H\u00f3a ch\u1ea5t<\/td>\nV\u1eeba ph\u1ea3i<\/td>\nSuperior (solvents, acids)<\/td>\n<\/tr>\n
Tr\u1ecb gi\u00e1<\/td>\nTh\u1ea5p h\u01a1n<\/td>\nCao h\u01a1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Read our full comparison: V\u00f2ng \u0111\u1ec7m Buna so v\u1edbi Nitrile<\/a><\/p>\n

Where are Buna O-rings commonly used?<\/h2>\n

I\u2019ve seen Buna O-rings used across dozens of industries. Here\u2019s where they shine:<\/p>\n