Applicable occasions and selection principles of stop valve
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Release Time：2021-05-21
The applicable occasions and selection principles of the cut-off valve:(1) the cut-off valve should be selected on the pipeline or device of high temperature and high pressure medium. Such as thermal power plants, petrochemical system of high temperature, high pressure pipeline. (2) On the pipeline with lax requirements on the flow resistance. That is, the pressure loss is not considered.
Applicable occasions and selection principles of stop valve
(1) high temperature, high pressure medium on the pipeline or device should be selected stop valve. Such as thermal power plants, petrochemical system of high temperature, high pressure pipeline.
(2) On the pipeline with lax requirements on the flow resistance. That is, the pressure loss is not considered.
(3) Small valves can be selected as cut-off valves, such as needle valves, instrument valves, sampling valves, pressure gauge valves, etc.
(4) There is flow regulation or pressure regulation, but the regulation accuracy is not high, and the pipe diameter is relatively small, such as the nominal diameter of less than or equal to 50 on the pipe, should choose the cut-off valve or throttle valve.
(5) synthetic industrial production of small fertilizer and fertilizer should be selected in the nominal pressure PN160 or PN320 high pressure angle valve or throttle valve.
(6) In the desilication workshop and the pipeline easy to coke in the production of alumina, the straight-flow stop valve or the straight-flow throttle valve with the valve body separated, the valve seat can be taken out and the hard alloy sealing pair should be selected.
(7) urban construction in the water supply, heating engineering, nominal diameter smaller pipeline, can choose the stop valve, balance valve, plunger valve.
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