How should I choose when buying a butterfly valve?

Butterfly valve with wear resistance, long life, good sealing performance, light switch, etc., mainly for the use of cut-off valve, the current butterfly valve in the use of low-pressure large and medium diameter pipe more and more.
Butterfly valve a wide range of users need to use the butterfly valve when the need to select the specific use of the butterfly valve, the first need to be clear that the diameter of the pipeline, according to the pipeline need to clear the discharge capacity of the butterfly valve can be allowed flow resistance,

The size of the diameter, etc., and according to the pipe temperature to select the appropriate material. For the choice, the advantages of Tianjin valve manufacturers choose the following principles:
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1, The need for flow adjustment, the choice of worm gear drive, pneumatic or electric with V-shaped opening adjustment butterfly valve.
2, Oil, natural gas pipeline, need to clean the pipeline, but also need to be buried in the ground, the choice of full diameter, all-welded structure of the butterfly valve; buried in the ground, select the full diameter welded or flange connection butterfly valve.Use flange connection, welded connection, full diameter or reduced diameter butterfly valve.
3, Metallurgical systems, power systems, petrochemical plants, urban heating systems in the high-temperature medium of the pipeline system or device, the choice of metal-to-metal seal butterfly valve.
4, The refining unit of the catalytic cracking unit of the pipeline system, the choice of lift rod butterfly valve.
5, The oil pipeline and storage equipment, the choice of flange connected butterfly valve.
6, Metallurgical system in the oxygen pipeline system, should be selected after a rigorous degreasing treatment, flange connection of the fixed ball butterfly valve.
7, The chemical system of acid and alkali and other corrosive media devices and piping systems, should use austenitic stainless steel, Teflon valve seat seal for the whole stainless steel butterfly valve.
8, The city gas and natural gas pipeline, the choice of flange connection and internal thread connected floating butterfly valve.
9, Low-temperature medium piping systems and devices, should use the valve with the low-temperature butterfly valve.
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The market is full of different quality of the valve products, the selection of butterfly valve should try to select some well-known domestic manufacturers, such as RUIDU VALVE,JKTL VALVE such as good reputation of the valve good service companies, more to protect the quality and service life of butterfly valve.