What is the difference between a pressure reducing valve and a safety valve?
Pressure reducing valves and safety valves are both valves that regulate pressure, but their roles and working principles are different. The main role of the safety valve is to protect the safety of equipment and personnel, when the pressure in the pipeline exceeds the set value, the safety valve will automatically open, discharge pressure to protect the equipment from damage. Pressure reducing valves, on the other hand, regulate the pressure in the pipeline to maintain it within a safe range to ensure the safety of equipment and operators. Pressure reducing valves can adjust the pressure in piping to suit different operational requirements.
Overview
Pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through adjustment and keeps the outlet pressure stable automatically by relying on the energy of the medium itself. By changing the throttling area, so that the flow rate and the kinetic energy of the fluid changes, resulting in different pressure losses, so as to achieve the purpose of pressure reduction. Then rely on the control and regulation system adjustment, so that the fluctuation of the pressure after the valve is balanced with the spring force, so that the pressure after the valve is kept constant within a certain error range.
A safety valve is a device used to protect equipment and systems from damage caused by excessive pressure. When the system pressure exceeds the preset safety value, the safety valve will automatically open to vent a portion of the gas/fluid in the system to the atmosphere/outside the pipeline, so that the system pressure does not exceed the permissible value, in order to prevent equipment damage or accidents. Safety valves are usually installed upstream of critical equipment or systems to ensure timely pressure reduction in case of emergency. Safety valves are relatively simple in design and operation and usually do not require complex control systems.
In summary, pressure reducing valves are used to continuously reduce system pressure and maintain stability, while safety valves are activated when system pressure exceeds a set point to prevent system pressure from becoming too high.
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