PHOSPHORIC ACID Resistant O-Rings and Seals
Phosphoric acid, also known as orthophosphoric acid, is an inorganic compound with the chemical formula H3PO4. It is commonly used in many industries, such as food and beverage, pharmaceutical, agricultural and industrial production, and water treatment. It is also used as a cleaning agent for metal surfaces and to remove rust from steel.
When rubber is exposed to phosphoric acid, it can experience premature aging, cracking, and discoloration due to the acidity of the chemical. It is especially corrosive to elastomers, which are typically used in rubber seals. Over time, the acid can cause the rubber to lose its elasticity and become brittle, leading to failure. Additionally, rubber that is exposed to phosphoric acid for extended periods of time can become permanently stained.
FKM (Viton®)
Viton ® o-rings from Marco Rubber offer excellent compatibility with a range of chemicals, oils and resist high temperatures up to 400F. Viton ® is also known as FKM made of fluoroelastomer one of the most versatile and widely used sealing materials.
V1000 FKM
- General purpose material
V1003 FKM
- General purpose material
V1007 FKM
- For higher pressure applications
Rubber Material Compatibility with PHOSPHORIC ACID
View some of our other material compatibility ratings with PHOSPHORIC ACID. If you don't see what you're looking for or need more guidance, our team of experienced sealing design engineers can help select the best sealing products and material for your specific application.
View Full Chemical Compatibility Guide
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