Black NBR valve seat for wafer / lug type butterfly valve 1''-54''
Basic characteristics of nitrile rubber (NBR):
1. Due to the presence of polar nitrile groups, it has high
stability to non-polar or weakly polar mineral oils, animal and
vegetable oils, liquid fuels and solvents. Oil resistance is its
greatest specialty. The higher the propylene content, the better
the oil resistance.
2. heat resistance is better than natural rubber, styrene butadiene
rubber, neoprene, can be used in the air at 120 ° C for a long
3. good air tightness, second only to butyl rubber.
4. Cold resistance and low temperature resistance are poor, and the
higher the acrylonitrile content, the worse the cold resistance.
5. because of the non-crystalline rubber, the raw rubber strength
is low, must be blended with a reinforcing agent, improve the
amount of acrylonitrile combined to help increase strength and wear
resistance, but the elasticity is reduced.
6. The dielectric properties of nitrile rubber are inferior and
belong to semiconductor rubber.
7. The balance between oil resistance and permanent deformation of
the rubber compound, and the balance between oil resistance and
electrical properties is important.
8. the scope of application: Mainly used in the production of
oil-resistant rubber products, widely used in the manufacture of
seals, gaskets, gaskets and other molded products and extruded
products, all kinds of rubber rubber rollers, oil-resistant hoses,
industrial supplies and adhesives, etc.
9. Certificate: KTW W270 EN681-1,ACS,NSF61/372;WRAS,EC1935;FDA,EC1935;REACH,ROHS
Related Material Quick Selection Table:
|Nitrile rubber has good self-expanding properties, abrasion
resistance and hydrocarbon-resistant properties. It can be used as
a general material for water, vacuum, acid, salt, alkali, grease,
oil, butter, hydraulic oil, glycol, etc. Can not be used in places
such as acetone, ketone, nitrate, and fluorinated hydrocarbons.|
Ethylene-propylene rubber is a good general-purpose synthetic
rubber that can be used in hot water systems, beverages, dairy
products, ketones, alcohols, nitrates, and glycerin, but not in
hydrocarbon-based oils, inorganics, or solvents.
|Neoprene is used in media such as acids, oils, fats, butters and
solvents and has good resistance to attack.|
|Fluororubber is a good hydrocarbon-resistant base oil, fluorinated
hydrocarbon rubber for oily gas and other petroleum products. It is
suitable for water, oil, air, acid and other media, but it can not
be used for steam, hot water or thicker than 82 °C. Alkali system.|
|SR||-70℃~200℃||Silicone rubber is resistant to high temperature, low temperature
and stable chemical properties, and is widely used in industries
such as strong acid, weak alkali and food.|
Special materials: carboxylated nitrile rubber, hydrogenated
nitrile rubber, corrosion-resistant ethylene-propylene rubber,
steam-resistant fluoroelastomer, chlorosulfonated polyethylene