First, what is the safety valve
Refrigeration safety valve is a kind of valve used to protect the refrigeration equipment and system safety, belongs to the automatic pressure relief valve. Safety valve is usually composed of valve body, valve cover, spring, spool and guides. Its opening and closing parts in a normally closed state, when the pressure of the medium in the refrigeration equipment system exceeds the set safety value will be automatically opened, by discharging a certain amount of fluid to the outside of the system, in order to prevent the pipeline or equipment medium pressure exceeds the specified value. Safety valve in the refrigeration system to play a safety protection role.
Second, why install safety valves
Safety valves are mainly used to protect refrigeration equipment and pressure vessels (such as liquid storage tanks, condensers), etc. from damage caused by excessive pressure. The following are several reasons why safety valves need to be installed:
1. to prevent equipment rupture: when the pressure inside the refrigeration equipment or pressure vessel exceeds the pressure value set by the safety valve, the safety valve will automatically open to release some fluid to avoid equipment or vessel rupture.
2. Protecting personnel safety: Excessive pressure may lead to equipment explosion or leakage, causing injury to the operator. Installation of safety valves can reduce the pressure in time to protect the safety of personnel.
3. Avoiding system failure: Excessive pressure can cause damage to the refrigeration system, such as pipe rupture, equipment damage, etc. The installation of safety valves can avoid these failures. The installation of safety valve can avoid these failures and extend the service life of the system.
4. Meet regulatory requirements: According to relevant regulations and standards, some refrigeration equipment and pressure vessels must be installed with safety valves to ensure compliance with safety requirements.
Third, the safety valve selection factors to consider
In the selection of safety valves, the following factors need to be considered:
1. Equipment type and working conditions: according to the specific type of refrigeration equipment and working conditions, select the appropriate safety valve. For example, different refrigeration media, working temperature and pressure requirements will affect the selection of safety valves.
2. flow requirements: according to the flow requirements of the system, select the appropriate safety valve. The maximum flow rate and minimum flow rate of the system need to be considered to ensure that the safety valve can meet the needs of the system.
3. pressure range of the safety valve: according to the working pressure range of the system, select the appropriate safety valve. The set pressure of the safety valve should be slightly higher than the maximum working pressure of the system to ensure that it can be opened in time when the system reaches the maximum pressure.
4. safety valve material and corrosion resistance: according to the nature of the medium and corrosive, choose the appropriate safety valve material. Different media may have a corrosive effect on the safety valve, so you need to choose corrosion-resistant materials.
5. safety valve certification and compliance standards: select the safety valve with certification and compliance with relevant standards to ensure its quality and reliable performance.
6. Consideration of other factors: according to the specific needs, consider the adjustability of the safety valve, installation methods, maintenance and repair requirements.
Post time: Aug-21-2023