Soft seal butterfly valve refers to the valve sealing ring material is non-metallic material butterfly valve, the most common non-metallic materials are EPDM rubber, nitrile rubber, and PTFE fluorine plastic three. Because these non-metallic materials have a certain degree of elasticity, after the butterfly valve is closed, the metal butterfly plate can press the soft seal valve seat, enhancing the sealing performance of the butterfly valve and achieving zero leakage.
The three different seal ring materials of the soft seal butterfly valve correspond to the applicable media in the pipeline.
EPDM rubber is ozone-resistant, aging-resistant, non-toxic and harmless. It can be installed in pipelines such as freshwater, sewage, and seawater and steam.
Nitrile rubber has certain toxicity, so it is not suitable for mediums such as fresh water, but on the other hand the nitrile rubber has outstanding oil resistance. It is very suitable for use in oil pipelines, oil-based media, but pay attention Nitrile rubber is limited in heat resistance and cannot be overheated.
Teflon material has a strong anti-corrosion properties, it is characterized by resistance to a variety of acids and bases and organic solvents. Because of its excellent corrosion resistance, this material is mainly used in corrosive media pipelines in the petroleum, chemical, smelting, and dyeing industries.
Soft seal butterfly valve is easy to use, uses a wide range of different soft seal materials, can adapt to a variety of corrosive, non-corrosive and a variety of acid and alkaline media, but also because of the limitations of soft seal material, soft seal butterfly valve Not suitable for high temperature and high pressure, especially strong in the pipeline medium.
Regarding the type of soft seal butterfly valve, because the soft seal butterfly valve can have many classifications according to the connection mode, drive mode, etc., the codes corresponding to different classifications are also different, and because the soft seal butterfly valve can only be used in the normal pressure environment, its Working pressure is ≤ 16 kg. Below we use the example to explain the composition of the soft seal butterfly valve.
D971X-16Q electric soft seal butterfly valve
Butterfly Valve Code D
Electric drive code 9
Wafer connection code 7
Midline structure code 1
Rubber soft seal lining material
Working pressure 6kg 10kg 16kg
Body material code Q
