【Daily Question】The installation requirement for stop valves is low inlet and high outlet (50 points for participation + 2 points for wealth). Deadline: 12/8/2015
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This post was last edited by HSLJHZ on 2015-12-8 at 09:26. In order to increase the popularity of the heat exchange section, a \"Question of the Day\" activity has been introduced there; this helps to foster an active atmosphere for technical exchanges while also providing members with financial rewards. 【Daily Question】True or False: The installation requirement for globe valves is to have the inlet at a lower level and the outlet at a higher level. ( ) Reply with your answer in the comments to participate; +2 wealth points will be awarded (automatic addition of wealth points is enabled; no additional points or comments will be given if your answer is incorrect). An additional 3–8 wealth points will be given if all answers are correct. Extra wealth points will also be awarded if the questions or answers are analyzed and explained thoroughly (or if there is a standard-based explanation). If your answer is correct and your analysis and explanation are accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours to reveal the answers and explanations, as well as the best response (the best help). Charisma Reward: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will have a moderator grant you charisma points. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights and opinions. After registration, we will rank based on the content of the posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score getting +5 charm. Other news: The competition for “Active Experts and Weekly Stars” in the Machinery Forum has begun. http://bbs.hcbbs.com/thread-1489069-1-1.html Recruitment for forum moderators and technicians in the [Machinery Forum] – applications and referrals are welcome. [Valid indefinitely] Come if you’re interested! 】http://bbs.hcbbs.com/thread-1288857-1-1.ht【Mechanical Section】Comprehensive Guide to Preventing Freezing of Equipment Over Winter http://bbs.hcbbs.com/thread-1502793-1-1.html
Generally, that’s the case. Accidental situations cannot be ruled out.
The installation requirement for stop valves is low inlet and high outlet. (Generally, this is the case.) Usually, both domestic stop valves and imported valves have the inlet at a lower level and the outlet at a higher level. This arrangement has an advantage: since the pressure or temperature is usually higher at the inlet side, when the stop valve is closed, the outlet side can be emptied, which makes it easier to replace the packing in the valve. If the inlet is at a higher level and the outlet at a lower level, repairs may be more difficult in case there is a leak in the packing area. If installed in the wrong orientation with high inlet and low outlet, the valve will vibrate even when left in the open position, and it must be replaced. However, some valves, such as those made by Wuxi, have a design with high inlet and low outlet, which is intended to ensure a tight seal. Under high pressure, valves are also designed with a high inlet and low outlet to ensure a tight seal.
The installation requirement for stop valves is low inlet and high outlet. (V)
Yes, for stop valves, the fluid generally flows from low to high; in special cases, reversing their installation can improve sealing performance.
√ Generally, domestic stop valves and some imported valves have the inlet at a lower level and the outlet at a higher level. One advantage of this design is that since the pressure or temperature is usually higher at the inlet side, when the stop valve is closed, the outlet side can be emptied, which facilitates the replacement of the packing in the stop valve； If there is a high inlet pressure and a low outlet pressure, and if there is a leak at the filling area, it is not easy to carry out repairs. If installed in the wrong orientation with high inlet and low outlet, the valve will vibrate even when left in the open position, and it must be replaced. However, some valves currently have high inlet and low outlet; this design is intended to ensure a tight seal. Furthermore, under high pressure, the valves are also designed with flow from high to low in order to ensure a tight seal.
Yes. But now some large-diameter stop valves tend to have high inlet and low outlet.
Generally, it is correct to have low inlet and high outlet, but nowadays there are many globe valves, especially high-pressure self-sealing globe valves, in which high inlet and low outlet are also common.
The judgment is wrong; not everything needs to be bought low and sold high. There’s a post in the Piping and Valves section.
The installation requirement for stop valves is low inlet and high outlet. (Mistake) Most globe valves have flow from low to high, but there are also those with flow from high to low
The installation requirement for stop valves is low inlet and high outlet. (right)