How to increase the opening speed of a valve?
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Our company has a relief valve, and the process requirements specify that the valve should open quickly, within 1 second. However, during actual testing, the solenoid valve loses power, resulting in an opening time of around 15 seconds. The attached diagram shows a rough sketch of the air circuit; how can this circuit be modified to ensure that the valve opens as quickly as possible?
1S – This means starting the rocket. Who told you to increase it to 1S? Who are you going to ask to develop such a system? It’s necessary to empty the air from such a large cylinder in just 1S. Although the time required for signal transmission can be ignored, friction within the valves and between the sealing elements also needs to be taken into account.
Increase the diameter of the exhaust pipe and the solenoid valve.
Keep the time as short as possible; it’s not necessary to achieve it in 1 second, but it definitely should be possible within 3 seconds. This is a valve for steam piping systems; when the unit shuts down, the valve opens rapidly in response to this action, thereby enabling flow rate control. It’s not impossible to achieve this; the 1S quick-opening function is already very mature, and it’s available in Leslie, Copais, and BMW valves.
A 1s on/off valve should be feasible; why does your vent valve also have a positioner? Is it perhaps a control valve? Our relief valve opens quickly in 200MS.
It is a control valve, which features a 1S quick-opening function that can be achieved by de-energizing the solenoid valve.
It’s not just the issue of the solenoid valve losing power; the key is the exhaust speed.
Yes, our problem isn’t likely related to exhaust; it’s probably the slow intake of air. When the solenoid valve loses power, the air that enters the lower cylinder comes from the air tank, and the pipeline in that route is too narrow
This post was last edited by Meng, Luoxuan on 2017-8-27 22:59 to speed up discharge with the control valve. The desired effect can be achieved
Change it to hydraulic oil, which has high pressure. Have you heard of a quick-shut valve?
The words in the diagram you drew are not clear. Here are two suggestions; I’m not sure if they will work. To speed up exhaust: 1. Close the exhaust port of the cylinder to facilitate faster exhaust; the closer it is to the cylinder, the better, as this reduces the time taken for gas to flow, thereby accelerating exhaust. 2. Activate the gas supply amplifier on the side of the cylinder, using a smaller gas line to control the inflow of gas through a larger line (4-mm or 6-mm pipes can be used, as long as the valves can handle them)