Understand the selection principle of globe valve

Globe valves are valves in which the shut-off piece (disc) moves along the center line of the seat.According to this movement of the disc, the change of seat vent is proportional to the disc stroke.Because the stem opening or closing stroke is relatively short, and has a very reliable shutoff function, and because the change in seat opening is proportional to the disc stroke, it is very suitable for flow regulation.Therefore, this type of valve is ideal for cutting or adjusting and throttling.

Z61H, Z61Y, Z61W

Selection principle

1, high temperature, high pressure medium on the pipeline or device should choose the cut-off valve.Such as thermal power plants, nuclear power plants, petrochemical system of high - temperature, high - pressure pipeline.

2. The tube path where convection resistance is not strictly required.Where the pressure loss is not taken into account.

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

4. There is flow regulation or pressure regulation, but the regulation accuracy is not high, and the diameter of the pipeline is relatively small, such as the nominal tube path ≤50mm, it is appropriate to choose.

5. synthetic industrial production of small and large chemical fertilizers should choose the nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa high pressure Angle globe valve or high pressure Angle throttle valve.

6. alumina bayer production of desilicate workshop, easy to coking on the pipeline, easy to choose the valve body separation, valve seat can be removed, hard alloy sealing pair of straight flow globe valve or straight flow throttle valve.

7. For water supply and heat supply projects in urban construction, cut-off, balance valve or plunger valve can be selected for smaller pipelines through nominal channels, such as pipelines with nominal channels less than 150mm.