Maintenance of safety valves

It needs to be verified once a year. No special maintenance is required on a regular basis; safety valves equipped with manual devices such as steam valves should be checked manually on a periodic basis (every 2–3 months).

If the safety valve is exposed to the outdoors, it is advisable to use a stainless steel safety valve. Another option is to apply rust-proof paint to the surface of the valve body, and install a discharge pipe about one meter long at the valve’s discharge outlet; this will help protect the valve element from being damaged by rainwater. Of course, a safety valve must be calibrated at a certified inspection agency before it is put into use. During operation, it is necessary to carry out regular maintenance on the safety valve to keep it clean, preventing the valve body and springs from being clogged by oil or dirt or from becoming corroded, as well as preventing oil or other foreign substances from blocking the discharge pipe ； Regularly check whether the lead seal is intact, to prevent the weight of the lever-type safety valve from becoming loose or being moved, and to prevent the adjustment screw of the spring-type safety valve from being adjusted arbitrarily ； If a leak is detected in the safety valve, it should be replaced or repaired promptly. It is strictly prohibited to use methods that increase load (such as increasing the compression of the spring, moving the weight, or adding additional weights) to eliminate the leak ； To prevent the valve disc and seat from sticking due to contaminants such as oil in the gas, for air and steam safety valves, manual exhaust can be carried out periodically depending on the specific conditions of the gas.

So, how should a safety valve be selected? ?

Bro, where is your safety valve installed? What type of safety valve is it? How can it rust? Generally, the internal components of safety valves are made of materials that do not rust. Brother on the 4th floor, generally speaking, when selecting a safety valve: for safety valves on pressure vessels, the design team responsible for the vessel calculates the required discharge volume for safe release. As long as the discharge capacity of the safety valve is sufficient to meet this requirement (in other words, the valve’s discharge volume is greater than that of the vessel), it will be possible to ensure the protection of the vessel. Some standards require that the discharge volume of the safety valve be 1.1 times greater than the release volume, etc.; the requirements vary from standard to standard. The design agency provides the parameters to the safety valve manufacturer, who can then determine the size, type, and quantity of safety valves based on those parameters. The design unit provides the following parameters: discharge volume, discharge medium, set pressure (trip pressure, opening pressure, i.e., the pressure at which the safety valve activates), and medium temperature.

Bro, where is your safety valve installed? What type of safety valve is it? How can it rust? Generally, the internal components of safety valves are made of materials that do not rust. Brother on the 4th floor, generally speaking, when selecting a safety valve: for safety valves on pressure vessels, the design team responsible for the vessel calculates the required discharge volume for safe release. As long as the discharge capacity of the safety valve is sufficient to meet this requirement (in other words, the valve’s discharge volume is greater than that of the vessel), it will be possible to ensure the protection of the vessel. Some standards require that the discharge volume of the safety valve be 1.1 times greater than the release volume, etc.; the requirements vary from standard to standard. The design agency provides the parameters to the safety valve manufacturer, who can then determine the size, type, and quantity of safety valves based on those parameters. The design unit provides the following parameters: discharge volume, discharge medium, set pressure (trip pressure, opening pressure, i.e., the pressure at which the safety valve activates), and medium temperature.