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Globe Valve Manufacturing Process Is Better, Easy To Repair
Jun 22, 2017

The Globe Valve stem shaft and the Globe Valve seat sealing surface perpendicular to the stem open or close the stroke is relatively short, cut Globe Valve Globe Valve once in the open condition, and its Globe Valve seat and sealing surface between the no longer contact, And has a very reliable cutting action, making the cut-off Globe Valve products suitable for the media as a cut or adjust and throttling use. Once the stop Globe Valve is in the open state, it is no longer between the Globe Valve seat and the sealing surface of the Globe Valve, so the sealing surface of the sealing Globe Valve mechanical wear less. Since most of the Globe Valve seat and Globe Valve flap are easy to repair or replace the sealing element without the need to remove the entire Globe Valve from the pipeline, which for the Globe Valve and pipeline welding into one place is very suitable. The flow direction of the medium through such a Globe Valve has changed, so the flow resistance of the Globe Valve is higher than other Globe Valves. 

The most obvious advantage of the cut-off Globe Valve is that during the opening and closing process, the friction between the Globe Valve flap and the sealing surface of the Globe Valve body is smaller than that of the gate Globe Valve. The opening height of the shut-off Globe Valve is generally only 1/4 of the diameter of the seat passage and is therefore much smaller than the gate Globe Valve. Usually in the Globe Valve body and Globe Valve only one sealing surface, and thus manufacturing process is better, easy to repair. 

The principle of selection of cut-off Globe Valve is:

1, high temperature, high pressure medium pipe or device should use the cut-off Globe Valve. Such as thermal power plants, nuclear power plants, petrochemical systems on the high temperature, high pressure pipeline.

2, cut-off Globe Valve used in the pipeline on the flow resistance on the strict management of the pipeline. That is, the pressure loss is not considered much place.

3, small Globe Valve can choose needle, instrument Globe Valve, sampling Globe Valve, pressure needle and so on.

4, there are flow regulation or pressure regulation, but the regulation accuracy is not high, and the pipe diameter is relatively small, such as the nominal through the ≤ 50mm on the pipeline, should use the cut-off Globe Valve.

5, synthetic 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 Globe Valve or high pressure angle throttle. 6, alumina Bayer production of the desilicon workshop, easy to coke on the pipeline, easy to use the Globe Valve body separately, the seat can be, the carbide seal of the DC-type cut-off Globe Valve or DC throttle.

7, the city in the construction of water supply, heating works, the nominal through the smaller pipelines, optional shut-off Globe Valve, balance Globe Valve or plunger Globe Valve, such as the nominal through less than 150mm on the pipeline.

The leakage is also good handling, for the flange in the flange, the bolt in the next tight again, if not enough, it is necessary to open to see if the flange gasket is damaged, for the filler leak, tight packing gland , If the filler is too loose, it is necessary to add filler, if the body is directly on the leak, import pump repair, Grundfos maintenance, ITT maintenance, fly maintenance, low pressure, then you can weld, if it is high pressure to give up directly ,Safety first.

For the internal leakage problem, the situation is not sure: first, may not shut down, and then force off about, the second, seat seal damage, this will re-grinding, for the spool damage, depends on the erosion is damaged or Damaged by the media impact, but both have to re-welding the sealing surface.

The internal leakage is generally the Globe Valve seat or spool sealing surface damage, this can be grinding seat or spool sealing surface, but there is an ad hoc situation if it is electric or pneumatic it is possible to set the Globe Valve stroke is not set.

If the leakage should be a problem on the sealing surface, the sealing surface to look at the effect.

Leakage to see what place to drain, if the Globe Valve body leakage can only change the Globe Valve.

Yuhuan Sinpo Valve Co.,LtdTel: +86-576-89903137