safety valve

Description

safety valve

The safety valve prevents the increase of pressure in the pipelines, if the pressure in the pipeline is higher than the pressure set on the pilot installed in the control circuit of the valve, the valve will automatically open and drain the required amount of water out of the system. Does up from the increase
Avoid pressure.

If this valve is installed between the two upstream and downstream areas in high areas, it maintains the minimum pressure for the upstream area to avoid being overshadowed.

According to the API 520 Part 1 standard, which examines how to choose, calculate the size, how to install pressure breaker equipment in refineries. this valve is closed with a spring. And when the pressure behind the valve reaches a specific static pressure, it opens quickly. (This action is called POPping the valve) Safety valves are usually used for compressible fluids. By knowing the surface area of ​​the orifice and the size of the nozzle, it is possible to determine the volume of liquid that will come out of the valve. First, the size of the outlet nozzle (called the orifice) should be calculated.

In industry, pressure vessels must be protected by a safety valve.

Safety valves are designed at a pressure about 10% higher than the pressure that the tank must hold or at the highest pressure that the tank can withstand.

In explosion-proof tanks, the tank pressure should not exceed 20% of the design pressure.

The opening method of the safety valves and their working characteristics are directly related to the design of the internal parts of the valve.