What are the suitable and unsuitable oils for rubber seals?
Rubber seals are widely used in hydraulic systems to prevent liquid leakage and maintain sealing.
However, different rubber materials have different adaptability to oil. Here are some oils that are and are not suitable for contact with rubber seals.
Suitable oils kinds
- Hydraulic oil: Rubber seals can come into contact with most hydraulic oils, such as mineral oil, synthetic hydrocarbons, esters, etc. These oils have high viscosity and good lubricating properties, which protect the seal and maintain its sealing performance.
- Lubricating oil: Rubber seals can also come into contact with lubricating oil, such as engine oil, gear oil, etc. These oils provide lubrication, reduce friction and wear, and extend the life of machinery.
- Special oil: Some special oils, such as thermal oil, silicone oil, etc., can also come into contact with rubber seals. These oils have special properties and uses to meet specific process needs.
Illustrations of some common rubber seals and oils suitable for them;
- NBR (Nitrile Butadiene Rubber) Seals:
- Suitable oils: mineral oil (such as lubricating oil and hydraulic oil), diesel oil, fuel oil, etc.
- Unsuitable oils: polar solvents, ketone solvents, ester solvents, etc.
- EPDM (ethylene propylene rubber) seals:
- Suitable oils: hydrocarbon oils (such as gasoline, diesel), ketone solvents, refrigerant, etc.
- Unsuitable oils: lubricating oil, hydraulic oil, etc.
- FKM (fluorine rubber) seals:
- Suitable oils: synthetic lubricants, hydraulic oils, ketone solvents, etc.
- Unsuitable oils: low molecular weight ketone solvents, ester solvents, alcohol solvents, etc.
- VMQ (silicone rubber) seal:
- Suitable oils: synthetic lubricants, ketone solvents, low-temperature freezing fluids, etc.
- Unsuitable oils: hydrocarbon solvents, hydraulic oil, etc.
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