What is a quick-close valve
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A quick-shut valve was mentioned in the context of hydrocracking technology – what is that? :handshake Last edited by kaminoCMYhc on 2009-3-31 15:55 ]
Seeking information on the main steam valve and emergency shut-off valve of steam turbines: http://bbs.hcbbs.com/viewthread.php?tid=184265&highlight=%CB%D9%B9%D8%B7%A7. Working principle of the emergency shut-off valve system: http://bbs.hcbbs.com/viewthread.php?tid=405603
A quick-close valve, as the name implies, is a valve that closes rapidly. This type of valve has only two states: fully open and fully closed. It is generally used in two locations: one is at the steam inlet of the turbine, where it serves to quickly cut off the driving steam in order to protect the turbine ； Secondly, it is used at the connection between high pressure and low pressure to quickly cut off the flow of fluid and prevent overpressure in the low-pressure area. Hydrogenation units with a pressure of 6.0 MPa or higher, including hydrogenation refining and hydrocracking units, have two different scenarios, which is why they are all equipped with quick shutdown valves. For detailed structure and working principle, please refer to the address on floor 2.
The hydraulic valves used in specific locations on the process equipment must be a type of quick-close valve, with an opening/closing time of 1–2 seconds
A so-called quick-close valve is a valve that can be closed rapidly
A quick-shut valve seems to be the same as an ESD safety valve; it has only two states – open and closed – and its opening degree cannot be adjusted. It can act quickly in the event of an accident
The quick-shut valve is installed horizontally on the steam inlet pipeline of the turbine cylinder; it consists of components such as a valve body, filter screen, and hydraulic cylinder. This valve serves as the main closing mechanism between the new steam pipeline network and the turbine, and in the event of an accident during operation, it enables the steam supply to the turbine to be cut off in the shortest possible time.
On steam turbines, the quick-shut valve is also known as the main steam valve
A quick-close valve, also known as an emergency shut-off valve, can only be in either the fully open or fully closed position. It maintains its current operating state even when the instrument air supply is interrupted, and it can be adjusted automatically or manually.
Quick cut-off valve, which allows for rapid shutdown in emergency situations to ensure the safety of the device
A quick-shut valve is an emergency shutdown mechanism for the steam entering a turbine; it is used to shut off the steam valve in case of abnormalities, thereby stopping the operation of the turbine. It is mainly to ensure the safety of the protective devices
The quick-shut valve is horizontally installed on the intake pipeline of the turbine cylinder, and consists of components such as the valve body, filter screen, and hydraulic cylinder. The quick-shut valve is the main closing mechanism between the new steam pipeline network and the turbine; in the event of an accident during operation, it can cut off the steam flowing into the turbine in the shortest possible time.