Whether the flow resistance of the stop valve is higher than that of other valves
Classification:
Release Time：2017-08-10
Valve stem axis perpendicular to the valve seat sealing surface, stem opening and closing stroke is relatively short, and has a very reliable cut-off action, so this kind of valve is very suitable for cutting off the medium or adjust and throttle use. Valve once in the open state, it is no longer between the valve seat and valve sealing surface contact, so its sealing surface mechanical wear is small, because most of the valve seat and valve is relatively easy to repair or replace the sealing element without the entire valve removed from the pipeline, which for the valve and pipeline welded into one occasion is very applicable. The direction of flow of the medium through such valves has been changed.
Globe valveThe stem axis is perpendicular to the valve seat sealing surface, the stem opening and closing stroke is relatively short, and has a very reliable cutting action, so this kind of valve is very suitable for cutting off the medium or adjusting and throttling use.
Valve once in the open state, it is no longer between the valve seat and valve sealing surface contact, so its sealing surface mechanical wear is small, because most of the valve seat and valve is relatively easy to repair or replace the sealing element without the entire valve removed from the pipeline, which for the valve and pipeline welded into one occasion is very applicable. Medium through the valve flow direction has changed, so the flow resistance of the valve is higher than other valves.
Commonly usedGlobe valveThere are the following kinds:
1) Angle cut-off valve: In the angle cut-off valve, the fluid only needs to change the direction once, so that the pressure drop through the valve is smaller than that of the regular structure.
2) DC cut-off valve: In DC or Y-shaped cut-off valve, the flow channel of the valve body forms an oblique line with the main flow channel, so that the degree of damage to the flow state is smaller than that of the regular cut-off valve, so the pressure loss through the valve is relatively small.
3) Plunger cut-off valve: This form of cut-off valve is a variant of regular cut-off valve. In this valve, the disc and valve seat are usually designed based on the plunger principle. The valve clack is polished to connect the plunger and the valve stem, and the seal is realized by two elastic sealing rings on the plunger. The two elastic sealing rings are separated by a collar and the sealing rings around the plunger are pressed firmly by the load applied to the bonnet by the bonnet nut. Elastic sealing ring can be replaced, can be made of different materials, the valve is mainly used for "open" or "off", but with a special form of plunger or special collar, can also be used to adjust the flow.
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