Guidance on the selection method of the hottest st

Guide the selection method of stop valve

the stem axis of stop valve is perpendicular to the sealing surface of valve seat. The opening or closing stroke of the valve rod is relatively short, and it has a very reliable cut-off action, which makes this valve very suitable for cutting off or adjusting the medium and throttling. Once the disc of the stop valve is in the open state, its seat and the sealing surface of the disc will no longer be in contact, and has a very reliable cut-off action. This kind of valve is very suitable for cutting off or adjusting the medium and throttling

once the stop valve is in the open state, there will be no contact between its seat and the sealing surface of the disc, so its sealing surface has less mechanical wear. Because most (4) energy losses (pointer friction, bearing friction and air resistance) should meet the requirements of Table 1 energy losses, the seat and disc of the stop valve are relatively easy to repair or the whole valve does not need to be removed from the pipeline when replacing sealing elements, This is very suitable for occasions where valves and pipelines are welded together. When the medium passes through such valves, the flow direction changes, so the flow resistance of the stop valve is higher than that of other valves. Fluorine lined butterfly valve

there are several commonly used stop valves: 1) angle stop valve; In the angle stop valve, the fluid only needs to change the direction once, so that the pressure drop through this valve is smaller than that of the conventional stop valve. 2. The use and detection of each material is also the most important in the production of rail transit assembly enterprises. 1) doctors with 7 years of clinical experience in DC stop valves; In the once through or Y-shaped stop valve, the flow passage of the valve body forms an oblique line with the main flow path, so the damage degree of the flow state is smaller than that of the conventional stop valve, so the pressure loss through the valve is correspondingly smaller. 3) Plunger stop valve: this type of stop valve is a variant of the conventional stop valve. In this valve, the disc and seat are usually designed based on the plunger principle. The valve disc is polished into a column plug and connected with the valve rod. The sealing is realized by two elastic sealing rings sleeved on the plunger. The two elastic sealing rings are separated by a collar, and the sealing ring around the plunger is firmly pressed by the load applied on the bonnet by the bonnet nut. The elastic seal ring can be replaced and made of various materials. The valve is mainly used for "opening" or "closing", but it is equipped with a special plunger or special collar, which can also be used to adjust the flow