1. High temperature, high-pressure medium pipe or device should choose the cut-off valve. such as thermal power plants, nuclear power plants, petrochemical systems of high temperature, high-pressure pipe road.
2. Piping on the road is not strictly regulated by convection. That is where the pressure loss is not considered.
3. Small valves can choose needle valves, instrumentation valves, sampling valves, pressure gauge valves and so on.
4. There is a flow adjustment or pressure adjustment, but the adjustment of the precision requirements are not high, and the pipe diameter is relatively small, such as the nominal flux ≤ 50mm of pipe road, it is advisable to choose.
5. Synthetic industrial production of small fertilizer and large fertilizer should choose the nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa high pressure angle-type cut-off valve or high pressure angle valve.
6. Alumina Bayer process in the production of silicon removal workshop, easy-to-coking pipe road, easy to choose the valve body separated, valve seat can place, cemented carbide sealed DC valve or DC-type cut-off valve.
7. Urban construction of water supply, heating project, the nominal diameter of the smaller pipeline, can choose cut-off valve, balance valve or plunger valve, such as the nominal diameter of less than 150mm of Pipe road.