Tips for valve selection
date：2017/10/27 14:34:14 source：
Welded stop valve and pipeline connection using welded structure. Sealing surface is not easy to wear, scratch, sealing performance, long life. Compact structure, good opening and closing, small height, convenient maintenance. It is suitable for water and steam oil pipeline and has the characteristics of high temperature resistance and high pressure resistance.
1, high temperature, high pressure medium pipeline or device should choose cut-off valve. High temperature and high pressure pipelines on fire power plants, nuclear power plants and petrochemical systems.
2, the pipeline convection resistance is not strict on the pipeline. Where the pressure loss is not considered very much.
3, small valves can choose needle valve, instrument valve, sampling valve, pressure gauge valve, etc..
4, a flow control or pressure regulation, but regulation accuracy is not high, but also the relatively small diameter pipes, such as the nominal pipe by less than 50 mm, should be selected.
5, small chemical fertilizer and large chemical fertilizer in synthetic industrial production should choose high pressure angle cut-off valve or high pressure angle throttle valve with nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa.
6, the alumina production process of the desilication workshop, easy coking pipeline, easy to choose valve body separation, valve seat can be located, carbide sealing pairs of DC stop valve or DC throttle valve.
7, in the construction of city water supply, heating engineering, nominal pipe by small, can use cut-off, balancing valve or piston valve, such as nominal pipe by less than 150 mm.