[Daily Question 20090417] The use of regulating valves
Thread Content
Have you ever used high-pressure sleeve regulating valves and sleeve-guided regulating valves? Tell us what you think about the usage scenarios of the two. How is the usage situation? What kind of problems did you encounter? How to solve it? Eliminate writing on the blackboard and support originality.
We have all used it, but I'm sorry, I haven't studied it. It seems to be used in high-pressure places to prevent excessive fluid pressure from damaging the valve core. Upvote, I hope more sea friends will see the answer and be eager to learn. * one time.
The high-pressure sleeve type control valve is mainly used when the pressure drop of the control valve is large, which cannot be satisfied by a single-seat valve or the noise is too high. In addition, if a single-seat valve is used where cavitation may occur due to high pressure difference, a sleeve-type valve should also be considered. Sometimes it can be an angle valve, but it must be calculated. If the noise still cannot be reduced, a labyrinth-type multi-stage pressure reducing valve can be used, which can reduce noise and ensure no cavitation.
This topic is finally becoming somewhat popular, haha. I hope you will continue to discuss this topic.
my understanding: In fact, high-pressure sleeve control valves and sleeve-guided control valves are both derivatives of sleeve valves, which are determined according to different operating conditions. High-pressure sleeve valves are used in higher pressure places to overcome vibration and noise caused by high pressure, while guided sleeve valves are used to achieve low noise and anti-cavitation. We all know that sleeve valves have the advantages of larger flow coefficient than double-seat valves, large allowable pressure difference, and good stability. Moreover, the guide structure has high rigidity and is not prone to vibration during operation. By replacing different sleeves, different flow capacities and flow characteristics can be obtained, completely replacing single and double-seat regulating valves to a large extent. Our sleeve valves are used in a wide range of applications. A typical fault occurs when the sleeve valve is used for the first time in medium and high-pressure steam places. After being heated for a period of time, the sleeve and the valve seat become stuck, resulting in the inability to adjust. Check that the cause of the failure is the expansion of the sleeve material. During processing, the outside of the sleeve needs to be thinned under the guidance of the manufacturer. There have been no less than 10 such examples, so it’s no surprise.