Types of integrated check valves

An integrated check valve refers to the check valve which has combined a strainer-filter assembly with a compact structure.
There are two main check valve types:
1) Inlet check valves are more often used in pumps. Internal air/fluid pressure from squeezing the pump closes the inlet valve and the air/fluid is forced through the flat check valve into the bladder. While the pump is returning to its original shape, a vacuum is created, opening the inlet valve and drawing outside air/fluid in for the next cycle.
2) Flat check valves are primarily used in air-cells as a port to introduce air/fluid.  They can also be used as a check to prevent the same air/fluid from escaping.
It is obvious to see that the are holding a wide range of possible applications. The excellent features have done plenty of favors at the employment of the integrated check valves. For example, the elongated conduit gives an inlet and on outlet connecting a fluid passageway.