Why should valves be installed with the inlet at a lower level and the outlet at a higher level?
Thread Content
Regarding the installation sequence of valves, why is it that for globe valves, fluid should flow in from below and out from above? What is the purpose of this?
Generally, medium and low-pressure stop valves have the inlet at the lower level and the outlet at the higher level; this arrangement ensures that the packing is not under stress when shutting off, reducing the likelihood of leakage and thus extending the valve’s service life； Generally, for stop valves with DNA100 or higher, a high-inlet and low-outlet design can be used ； Under large-diameter and high-pressure conditions, it is difficult to close the valve when using a low-inlet, high-outlet configuration. Secondly, in such high-pressure and large-diameter conditions, the valve stem is subject to water pressure for an extended period, which can cause it to deform or bend, thereby affecting the valve’s safety and sealing performance ； Thirdly, by choosing a high inlet and low outlet position, the diameter of the valve stem can be reduced, which also saves costs for both manufacturers and users.
It can still be used even if worn the other way around, but the data usage will be lower