What are the methods for selecting Gate Valve?

A Gate Valve is an automatic pressure relief device used on pressurized equipment, containers or pipelines. When the pressure in the protected system rises above the allowable value, the valve automatically opens and discharges part of the excess medium to prevent the system pressure from continuing to rise. When the system pressure drops to a certain specified value, the valve can automatically close again, thereby ensuring The system operates normally. How to correctly select Gate Valve is directly related to the economic benefits of the user and the safety of operators and equipment. The following is a brief introduction to several key points in selecting Gate Valve:

The working pressure of the Gate Valve and the nominal pressure as well as the working pressure level of the spring have completely different meanings and cannot be confused. Working pressure refers to the static pressure in front of the Gate Valve during normal operation, which is the same as the working pressure of the protected system or equipment.
The working pressure level of the spring refers to the working pressure range allowed by a certain spring. Within this pressure range, the opening pressure (that is, the set pressure) of the Gate Valve can be adjusted by changing the preload compression amount of the spring. Gate Valve with the same nominal pressure can be divided into many different working pressure levels according to spring design requirements. The specific classification is shown in the table below. The premise of classification is to ensure that the upper and lower pressure limits of each working pressure level can meet the action performance indicators stipulated in relevant standards.