Problems with the use of control valves
Thread Content
A single-seat control valve, with a diameter of DN100, for hot water as the medium. Due to operating conditions, there is a lot of gas in the hot water, resulting in severe air hammer effects and intense vibration of the control valve. Sometimes the noise is quite loud. It is temporarily not possible to remove it for inspection due to the hand valve. Is there any good way to protect the control valve in this situation? There is a concern that the air hammer could severely break the valve stem of the control valve, resulting in serious damage to the valve. Is there any way to protect it?
Since the process conditions are not available, shock absorption and reinforcement must be carried out outside the battery.
Can the gas be discharged through the valves at the high and low points of the pipeline?
The measuring medium is hot water. Steam is present on the inner surface due to process reasons. A gas hammer is generated. It must be quite difficult to get this out
I think this is quite difficult to handle; it would be good to have a vapor-liquid separator to separate the water side from the steam. The valve is being reinforced now.
The pipes near the control valve have now been reinforced with support structures. What concerns me the most at present is whether the connection between the valve core and the valve stem will break. The vibration is quite intense; when the air hammer passes by, the forces acting on the valve core and valve stem are very large. I’m not sure how long they will be able to hold up. Gas-liquid separation is a good solution, but the internal leakage in the manual valve is very severe at the moment. The medium pressure is still 8 kilograms. It is relatively difficult to carry out modifications. This pipeline has also been shut down. The entire plant has to be shut down! I can’t dare to stop now; I just have to keep going!
Fixed! But the effect isn’t very significant; mainly, it’s subjected to severe irregular forces internally
Do your valves have stop valves at the front and back? It can be controlled using a stop valve. Could we try lowering the temperature a bit?
Is it possible to find a solution from a technical perspective? What are the process conditions? Could you talk about it?
Could the original poster clarify whether by \"gas\" they mean steam or non-condensable gases? Is this hot water steam condensate?
There’s no other way without exhaust; install an exhaust valve