What Is The Selection Principle Of Globe Valve?

The globe valve only allows the medium to flow in one direction, and has directionality during installation. The structural length of the globe valve is longer than that of the gate valve, and at the same time, the fluid resistance is large, and the sealing reliability is not strong during long-term operation.

Globe valves are divided into three categories: straight-through globe valves, right-angle globe valves and straight-through oblique globe valves.

The selection principle of globe valve is:

1. A globe valve should be selected on the pipeline or device of high temperature and high pressure medium. Such as thermal power plants, nuclear power plants, high temperature and high pressure pipelines of petrochemical systems.

2. On pipelines where the requirements for convection resistance are not strict. That is, where the pressure loss is not considered.

3. Small valves can choose needle valve, instrument valve, sampling valve, pressure gauge valve, etc.

4. There is flow adjustment or pressure adjustment, but the requirements for adjustment accuracy are not high, and the diameter of the pipeline is relatively small, such as the pipeline with a nominal diameter of ≤50mm, it should be selected.

5. Small fertilizers and large fertilizers in synthetic industrial production should choose high pressure angle globe valve or high pressure angle globe valve with nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa.

6. In the desiliconization workshop and the pipelines prone to coking in the alumina Bayer process, it is easy to choose a DC globe valve or a DC globe valve with a separate valve body, a removable valve seat, and a cemented carbide sealing pair.

7. In the water supply and heating projects in urban construction, the nominal passage is smaller, and the stop valve, balance valve or plunger valve can be selected, for example, the nominal passage is less than 150mm.