As the selection of the valve guide

by:AIRWOLF     2020-05-17
Globe valve valve stem axis and the valve seat sealing surface vertically. Open or close the valve rod travel relatively short, and very reliable cutting action, makes the valve door very suitable for used as medium cut or adjust and throttling. Globe valve valve disc once in an open position, it is no longer between valve seat and valve disc sealing surface contact, and have a very reliable cutting action, close to the valve door very suitable for used as medium cut or adjust and throttling. Once cut-off valve is fully open, it's between the valve seat and valve disc sealing surface will no longer have a contact, thus its sealing surface mechanical wear and tear is small, because most of the globe valve valve seat and valve disc is easier to repair or replace the whole valve door sealing components without removed from the pipeline, for the gate valve and pipeline welding into one occasion is very applicable. Medium through such valve flow direction of the door has changed, so the cut-off valve flow resistance is higher than other gate valve. Commonly used globe valve has the following kinds: (1) Angle type globe valve; Only need to change in Angle type cut-off valve, fluid direction at a time, that through this gate valve pressure drop is smaller than conventional structure of the cut-off valve. 2) Once-through globe valve; In once-through or y-shaped cut-off valve, the valve body of the flow channel and the mainstream way into a diagonal lines, so that the flow state damage than conventional cut-off valve, and through the pressure loss of valve door also corresponding small. 3) Plunger type globe valve: this form of cut-off valve is normal variant of globe valve. In the gate valve, the valve flap and valve seat is usually designed on the basis of the principle of plunger. The valve disc polishing pillars plug connected to the valve rod, seal is set in the column inserting two elastic sealing ring. Two elastic sealing ring with a set of rings is separated, and through the valve cover nut to the load of the valve cover pressed around the plunger seal. Elastic sealing ring to replace, can use a variety of materials, the valve is mainly used for door & other; Open & throughout; Or & other; Customs & throughout; , but with a special form of plunger or special thimble, can also be used to adjust flow
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