HNBR valve seat for wafer / lug / flange butterfly valve 1''-54''
Hydrogenated nitrile rubber (HNBR)
1. Basic characteristics
1.1 Hydrogenated nitrile rubber, although saturated by
hydrogenation, retains the properties of the original nitrile. It
has tensile crystallinity and thus high strength.
1.2 Has good heat and ozone resistance, weather resistance and
chemical and alkali resistance.
1.3 Swelling properties of good technical resistant liquids
(including oils containing corrosive additives).
1.4 Good mechanical properties, even at temperature rise
1.5 Significant wear resistance under extremely hazardous
1.6 The vulcanizate has a higher tensile strength than nitrile
rubber and neoprene, which is close to that of carboxylated nitrile
1.7 Excellent acid-resistant (hydrogen sulfide) environment and
resistance to amine/oil mixtures, as well as resistance to
oxidizing fuels and lubricants.
1.8 Glass transition temperature Tg with hydrogenation degree
between -15- -40 °C, brittle temperature -50 °C.
2. Scope of application: Due to its unique performance, it is
widely used in the fields of oilfield industry, automobile
industry, aircraft manufacturing industry and construction
industry, such as manufacturing drilling pipe, drilling tube
protection layer, accumulator, automobile fuel and lubrication.
Gaskets, O-rings, seals, etc. are used in systems and engines.
The butterfly valve seal is an essential component for blocking all
three potential leakage paths: the sealing of pipes, flanges and
operating shafts, in shut-off valves, flap valves and disk valves.
In their materials and design, they must be configured optimally
for the respective application.
Sealing solutions from our factory offer a precisely calibrated
material quality and torque-reducing geometries. On one hand, they
allow the flap to close with a low expenditure of force. On the
other hand, they nonetheless feature a high pressing action for
Free of both dead space and the penetration of contamination, the
designs make possible hygienic applications for the food and
We can offer the FDA foodgrade rubber for your application.
Materil temperature chart
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