The valve stem shaft and the valve seat sealing surface perpendicular to the stem open or close the stroke is relatively short, the valve valve valve once in the open state, and its valve seat and sealing surface between the no longer contact, And has a very reliable cutting action, making the Globe Valve products suitable for the media as a cut or adjust and throttling use. Once the stop valve is in the open state, its valve seat and the valve seal surface is no longer between the contact, so the sealing valve sealing surface mechanical wear less. Since most of the valve seat and the valve flap are easier to repair or replace the sealing element, it is not necessary to remove the entire valve from the pipeline, which is suitable for the welding of valves and pipelines. The flow direction of the medium through such a valve has changed, so the flow resistance of the valve is higher than other valves.
The most obvious advantage of the Globe Valve is that during the opening and closing process, the friction between the valve flap and the sealing surface of the valve body is smaller than that of the gate valve. The opening height of the shut-off valve is generally only 1/4 of the diameter of the valve seat passage, and therefore is much smaller than the gate valve. Usually in the valve body and the valve only one sealing surface, so the manufacturing process is better, easy to repair.
The principle of selection of the valve is:
1High temperature, high pressure medium pipe or device should use the Globe Valve. Such as thermal power plants, nuclear power plants, petrochemical system of high temperature, high pressure pipeline.
2The shut - off valve is used on a pipe with a tight flow resistance on the pipe. That is, the pressure loss is not considered much place.
3Small valve can choose needle, instrument valve, sampling valve, pressure needle and so on.
4There is flow regulation or pressure regulation, but the regulation accuracy is not high, and the pipe diameter is relatively small, such as the nominal through ≤ 50mm on the pipeline, should use the Globe Valve.
5Synthetic industrial production of small chemical fertilizer and large chemical fertilizer should use the nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa high pressure angle valve or high pressure angle throttle.
6Alumina Bayer process in the production of desilicon workshop, easy to coke on the pipeline, easy to use the valve body separately, the seat can be, the carbide seal of the DC-type Globe Valve or DC throttle.
7Water supply in the construction of the city, the heating project, the nominal through the smaller pipeline, the choice of Globe Valve, balance valve or plunger valve, such as the nominal through less than 150mm on the pipeline.
The valve stem of the globe valve is perpendicular to the sealing surface of the valve seat. The stem is open or closed with a relatively short stroke and has a very reliable cut-off action, making this instrument valve ideal for cutting or regulating media and throttling.
Once the valve valve valve is open, its valve seat and the valve seal surface is no longer between the contact, and has a very reliable cutting action, together that the instrument valve is very suitable as a medium cut or adjust and Throttle use.
In addition, once the stop valve is in the open state, its valve seat and the valve seal surface is no longer between the contact, so its sealing surface mechanical wear less, because most of the valve seat valve and the valve is easier to repair Or replace the sealing element without the need to remove the entire instrument valve from the pipeline,Globe Valve which for the instrument valve and pipeline welding into one place is very suitable. The flow direction of the medium through such instruments when the valve has changed, so the flow resistance of the valve is higher than other instrument valves.