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Working principle of safety valves: Safety valves are devices designed to prevent pressure equipment and containers from exploding, by preventing pressure builds up or ensuring that the internal pressure does not exceed safe limits. A safety valve is a safety device widely used in pressure systems such as pressure vessels, boilers, and pressure pipelines to ensure the safe operation of these systems. 2|(I8T9j#b&q9f0\Sinopec|Refining|Equipment|Lubricants|Engine oil|**Standards|Environmental protection|Petroleum industry software|Oil processing|Chemical engineering processes. When the pressure in the container exceeds the specified limits, the safety valve opens automatically to release the excess pressure inside the container, thereby preventing damage to the container or pipelines. When the pressure inside the container drops to the normal operating pressure, it automatically shuts off to prevent all the gas from being released due to overpressure in the container, thereby avoiding waste and production interruptions. !_&N(Y6P9k5T+j0W*_ 0_*D5d"K8?-w3[Sinopec|Refining|Equipment|Lubricants|Engine oil|**Standards|Environmental protection|Specialized software for the petrochemical industry|Oil processing|Chemical engineering processes $K7M3c.t9~2L"g'A$g5uSinopec|Refining|Equipment|Lubricants|Engine oil|**Standards|Environmental protection|Specialized software for the petrochemical industry|Oil processing|Chemical engineering processes A safety valve consists mainly of three components: a valve seat, a valve disc (valve element), and a loading mechanism. The valve seat is either integrated with the valve body or assembled with it, and it is connected to the equipment. The valve disc is often accompanied by a valve stem, which fits tightly against the valve seat. Above the valve disc is a loading mechanism, and the magnitude of the load can be adjusted. When the pressure inside the device is within a certain operating range, the force exerted by the medium inside on the valve disc is less than the force applied to the valve by the actuating mechanism; the difference between these two forces constitutes the sealing force between the valve disc and the valve seat, which keeps the valve disc pressed tightly against the valve seat, preventing the medium in the device from escaping. When the pressure inside the device exceeds the specified operating pressure and reaches the opening pressure of the safety valve, the force exerted by the medium inside on the valve disc becomes greater than the force applied to it by the actuating mechanism; as a result, the valve disc moves away from the valve seat and the safety valve opens, allowing the medium inside the device to be discharged through the valve seat. If the discharge capacity of the safety valve is greater than the device’s safe discharge rate, the pressure inside the device gradually decreases, and after a short period of discharge, the pressure returns to the normal operating level. At this point, the force exerted by the internal pressure on the valve disc is less than the force applied to it by the loading mechanism; the valve disc presses tightly against the valve seat, fluid discharge stops, and the equipment continues to operate at its normal working pressure. Therefore, a safety valve closes or opens on its own by the interaction between the force of the medium acting on the valve disc and the force exerted by the loading mechanism, thereby preventing the equipment from experiencing overpressure.