Emergency shut-off valve

An emergency shut-off valve is a specialized type of valve that requires higher standards than ordinary valves; not only must it be of high quality, but there are also strict requirements regarding failure rates, opening and closing speeds, and sealing performance. If you need it, feel free to contact me and I’ll send you the relevant information.

An emergency shut-off valve, also known as a safety shut-off valve, is a special type of valve device. In the event of an emergency, this valve can be quickly closed or opened to prevent accidents. Emergency shut-off valves are usually connected to various safety monitoring instruments or controllers. For example, when connected to a combustible gas leak detection device, once the device detects a leak, the emergency shut-off valve will automatically and quickly close the main gas supply valve, thereby cutting off the gas supply and preventing serious accidents from occurring. Similarly, when connected to the safety controllers for the extreme temperature (pressure) of thermal equipment, if the temperature (pressure) at the monitoring point within the equipment exceeds the set limit values, the emergency shut-off valve will also automatically and quickly close the gas supply valve, thereby stopping the supply of fuel. In addition, emergency shut-off valves are also widely used in the central fire alarm systems of high-rise buildings, as well as in the gas supply networks of cities or factories. In high-rise buildings, in the event of a fire, emergency shut-off valves can automatically cut off the gas supply inside the building, preventing gas explosions. In the gas supply networks of cities or factories, emergency shut-off valves can be centrally controlled from a control room, allowing for the immediate shutdown of gas supply to the affected area via remote control. Emergency cut-off valves are typically normally open pulse-actuated solenoid valves, equipped with accident self-locking and manual reset functions. It is an important component of the emergency shut-off device, available in both automatic and manual types. The automatic emergency shutdown device is mainly composed of sensing instruments, a logic operation unit, and an emergency shut-off valve, while the manual emergency shutdown device can be divided into remote manual and local manual types. Overall, emergency shut-off valves play an important role in ensuring industrial safety and preventing accidents.

No, ordinary manual gate valves or ball valves generally do not belong to emergency shut-off valves. An emergency shut-off valve is a valve used to quickly stop the flow of fluid in emergency situations; it is typically required to be capable of automatic or remote operation, such as safety valves and solenoid valves. .

How can manual operation achieve emergency shutdown? Only valves equipped with single-acting actuators can enable emergency shutdown; only such valves can be called emergency shut-off valves

Are there any standards or definitions that specify what an emergency shut-off valve is?

Article 3.1 of “Emergency Shut-off Valves for Liquefied Gas Equipment” (GB/T 22653-2008) defines an emergency shut-off valve as “a valve installed on tank trucks, tank containers, storage tanks, or pipelines, which can be quickly closed manually or automatically in emergency situations”. Article 3.1 of “Emergency Shutoff Valves for Cryogenic Media” (GB/T 24918-2010) defines an emergency shutoff valve as “a valve installed on tank trucks, storage tanks, or pipelines, which can be quickly closed manually or automatically in the event of an accident”. According to this definition, a manual operation can also be used for an emergency shut-off valve