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Selection principle of cut-off valve
May 15, 2018

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, high-temperature, high-pressure Pipe road.

2, the pipe road convection resistance requirements LAX pipe.

Where the pressure loss is not considered.

3, small valve can choose needle valve, instrument valve, sampling valve, pressure gauge valve and so on.

4, has the flow adjustment or the pressure adjustment, but the adjustment precision request is not high, moreover the pipeline diameter is relatively small, if the nominal passage ≤50mm the Tube road, appropriate chooses.

5, the synthetic industrial production of small fertilizers and large chemical fertilizers should choose the nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa high pressure angle-type cut-off valve or high-pressure angular throttle valve.

6, Alumina Bayer production of the silicon Removal workshop, easy to focus on the pipeline, easy to choose the valve body separate type, seat can be, the Carbide seal Deputy DC-type cut-off valve or DC-type throttle valve.

7, the city construction of water supply, heating engineering, the nominal path of the smaller pipeline, can be selected cut-off, balance valve or plunger valve, such as the nominal diameter of less than 150mm pipe.

In the opening and closing process, because the disc is in the valve body tightness The friction between the cover is smaller than the gate valve, so it is wearable. The opening height is generally only 1/4 of the valve seat channel diameter, so it is much smaller than the gate valve. Usually there is only one sealing surface on the valve body and disc, so the manufacturing process is better and easy to repair.


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