Spring Loaded Check Valve
There are two kinds of valves that employ spring when opening or closing the valve.
Spring Loaded In-Line Check Valve
The spring loaded in-line check valve has one of the simplest designs for check valves. This is also known as nozzle check valves or silent check valves. If you want to know more about brass inline check valves, check the video above.
There is a spring that aids the quick closing of the valve. Media flows into the valve when the pressure is higher than the cracking pressure, which then pushes the disk open, allowing the media to pass through.
If the back pressure or when the initial pressure has died down, the disc closes with the aid of the spring. One disadvantage of this type of check valve is that full removal of the valve is required for maintenance or repair.
Spring Loaded Y-Check Valve
The spring loaded Y-check valve is the other spring check valve type. Unlike the in-line variety where the spring and disc are in the same with the rest of the valve parts, the loaded y-check valve is positioned in an angle, creating a Y-shaped valve.
This makes the cleaning and maintenance of the valve easier because there is no need to detach it from the valve body. The only disadvantage is that the valve is bulkier than the in-line variety.