Little knowledge of safety valve

Safety valve is a special valve that prevents the dielectric pressure in the pipeline and equipment from exceeding the specified value by discharging the medium to the outside of the system when the dielectric pressure in the equipment and pipeline exceeds the specified value. Safety valves are automatic valves, mainly used in boilers, pressure vessels and pipelines, and the control pressure does not exceed the specified value. NOTE The safety valve must be pressure tested before it can be used. The structure management of safety valve can be divided into: 1. Spring-type safety valve: The spring-type safety valve is mainly composed of valve seat, valve core, valve stem, spring, guide sleeve, adjusting screw, lifting handle, valve body and other components. It uses the pressure of the spring acting on the valve core to balance the supporting force of the steam pressure acting on the valve core. 2. Lever-type safety valve: The lever-type safety valve consists of a valve body, a valve disc, a valve seat, a valve stem and a heavy hammer. It uses the action of a lever and a heavy hammer to compress the valve disc on the valve seat. When the pressure of the steam acting on the valve disc exceeds the pressure acting on the valve stem by the heavy hammer, the valve disc is lifted, and the steam passes through the safety valve. When the steam pressure is discharged, the steam pressure decreases; when the steam pressure acting on the valve disc is less than the weight pressure acting on the valve stem, the valve disc is re-compressed on the valve seat, so that the boiler can continue to operate. The following points should be paid attention to when setting the safety valve: 1. When there are gas and liquid two-phase materials in the container, the safety valve should be installed in the gas phase part. 2. When the safety valve is used to discharge flammable liquid, the outlet of the safety valve should be connected to the accident storage tank. When the discharged material is high-temperature combustible, its receiving container shall have corresponding protective facilities. 3. When there is a block valve at the inlet of the safety valve, the block valve should be in a normally open state and be sealed with lead to avoid errors. Matters needing attention: Safety valve is an important accessory to limit pressure and release pressure in special equipment (boiler, pressure vessel, pressure pipeline, etc.) and play an important role in safety protection. Safety valves are generally installed directly on special equipment. Its design, manufacture, installation, use, inspection, etc. conform to the relevant regulations of special equipment. The reliability and performance of that action are directly related to the safety of equipment and people. It is closely related to energy saving and environmental protection. If you still have questions about the safety valve, you can consult Lianke Valve Co.,Ltd., contact: +86-577-8585 9626.
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