Globe valve medium flow why low into high?

 

The opening and closing parts of the globe valve are plug shaped discs, which are sealed flat or conical, and the disc moves in a straight line along the centerline of the valve seat. Stem movement form, (common name: dark rod), there are also lifting rotary rod type can be used to control the flow of air, water, steam, a variety of corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid. Therefore, this type of cut-off globe valve is ideal for cut-off or regulation and throttling. Due to this kind of valve stem open or close stroke is relatively short, and has a very reliable cut off function, and because of the change of the valve seat opening and the stroke of the disc is directly proportional, very suitable for convection regulation.

 

Low pressure cut-off valve is generally low in higher, truncation packing don’t stress, reduce the rate of leakage, can prolong the service life of the general > DNA10 cut-off valve can be used in a high to low, large diameter and high pressure condition with low close valve into the above words are difficult, because if with low and high pressure, large diameter state into the above, The valve stem is easily deformed and bent by water pressure for a long time, which affects the safety and sealing of the valve. Three is the choice of high into low on the stem diameter can be small, for manufacturers and users will save some cost.
Small-bore cut-off valve generally with low into the above, the main reason is that the packing is not to work long hours in the state with pressure, prolong the service life of the packing, the second, also have certain protective effect to the stem, the most important is security, if the valve stem fracture or other malfunctions occur, stop valve can automatically open, prevent the system from overpressure.
The large-caliber globe valve adopts high inlet and low outlet. The reasons to consider are the size of the operating force and the sealing problem. If the low inlet and high inlet are still used, the operating force and sealing problem is not easy to solve.

 

Nortech is one of the leading industrial valve manufacturers in China with quality certification ISO9001.

Major products: Butterfly Valve, Ball Valve,Gate Valve, Check Valve, Globe Vavlve,Y-Strainers, Electric Acurator , Pneumatic Acurators .