Information on the resistance of seals
General information on the resistance of our pressurised sprayers and the seals (O-rings) used. Seals are essential for perfect functionality. NBR seals are usually used in normal pressure sprayers. However, such seals cannot be used at all for acidic products or substances, for example, as they are quickly destroyed by decomposition or swelling. It is therefore important to select the right pressure sprayer with the "RIGHT GASKETS" for the area of application.
Pressure sprayers with NBR seals (nitrile butadiene rubber)
Chemical resistance:
- vegetable and animal fats
- mineral oils, such as lubricating oils, hydraulic oils
- other. fuels (aliphatic hydrocarbons HFA, HFB, HFC fluids)
- common plant protection products such as: Algicides, fungicides, herbicides Pesticides, liquid fertilisers etc.
- NBR is only slightly resistant to weathering and ozone.
- Alcohols polar media such as esters, ketones and chlorinated hydrocarbons.
- Solvents and flame-retardant hydraulic fluids.
- organic acids, such as acetic acid
Pressure sprayers with Viton® FKM/FPM fluoro rubber
Chemical resistance:
- Especially with mineral oils
- aliphatic hydrocarbons (petrol, butane, propane, natural gas)
- Synthetic hydraulic fluids, aromatics (benzene, tuluene)
- chlorinated hydrocarbons
- Hydrofluoric and nitric acids, as well as other inorganic acids in concentrations of max. 10%
- Sulphuric acid and phosphoric acid only in concentrations of max. 30%
Not, or conditionally resistant to
- Glycol-based brake fluids,
- Polar solvents,
- Skydrol 500 and 7000,
- Bases, including sodium hydroxide, potassium hydroxide,
- short-chain organic acids, including acetic acid, alcohols, ethers,
- aldehydes and ketones
- Ask beforehand: Chlorine products for disinfection, including sodium hypochlorite
- organic solvents, including ethyl acetate and other flammable liquids with a temperature of over 40°C, sticky and viscous liquids and solutions that leave deposits.
Pressurised sprayer with EPDM (ethylene propylene diene rubber)
Chemical resistance:
- Bases
- alcohols
- ketones
- ethers
- and organic acids including acetic acid up to a concentration of max. 15%
- Potassium and sodium hydroxide in concentrations of up to 20%
Not or conditionally resistant to:
- Mineral oil products (lubricants, fuels).
- Inorganic acids, including hydrochloric acid,
- Chlorine products for disinfection, including sodium hypochlorite,
- organic solvents, including ethyl acetate and other flammable liquids with a temperature of over 40°C, sticky and viscous liquids and solutions that leave deposits.