These check valves are ideal for use with larger size tubing where liquid is more likely to leak from the end of the tube once the dose is completed.
These check valves have two ports, one as an inlet for the media and one as the output for the media. Pressure from the liquid flowing through opens the valve and it then closes once the liquid pressure stops flowing through. The main purpose of a check valve is to prevent leaking from the end of the tubing once the set dose is completed. Liquid is held in the tubing and doesn't continue to flow resulting in messy leaking on work areas.