Can a stop valve be installed vertically?
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Hello everyone, the stop valve is installed vertically with steam flowing from top to bottom – is there overall internal leakage in the valve? Was it a wrong selection?
This post was last edited by Yimi on 2016-3-3 at 16:28. It’s fine to install the stop valve vertically, but note that the stop valve itself has specific flow direction requirements
It seems that globe valves have no requirements regarding their installation orientation.
In vertically installed globe valves, the valve stem is in a cantilevered state, and seal failure can easily occur due to bending of the stem during use; the larger the diameter, the more pronounced this phenomenon is. It is recommended to switch to a globe valve with a guide valve disc, which would be much better.
Vertical installation is definitely no problem. One still needs to be careful with low input and high output; frequent internal leakage may indicate poor quality of the valve.
Smaller diameters are fine, but for larger diameters it is recommended to install them horizontally – firstly to facilitate operation (manual handling), and secondly to prevent leaks at the valve stem~~
This post was last edited by Leyou_2014 on 2016-3-4 at 16:41. Well, we have also carried out similar engineering designs; when selecting or purchasing valves, it’s essential to specify your requirements. For example, in vertical installation, valves of the same pressure class and type will have different internal components when installed horizontally versus vertically. Vertical-mounted globe valves seem to have an additional limit rod, which serves to prevent damage to the valve stem or packing seal due to the stem being too heavy (or too long). Valve manufacturers’ designers should know more about it. In cases like yours where there is a leakage, it’s usually because no specific requirements were given, and the manufacturer assumed a horizontal installation; it just so happens that your design requires a vertical orientation.
Pay attention to the flow direction during installation. It is no problem to install it on vertical pipes