We can replace pretty much any hydraulic directional control valve in the market. Most valves do follow certain standards and as long as we have the proper configuration most valves can be easily replaced.
Here is a hydraulic circuit schematic for a crossover hydraulic check valve system. This is an example on when and why you should use a crossover check on your hydraulic machinery.
What are the differences between a direct acting relief valve and a pilot operated relief valve? When and why should you use one valve over the other one?
These are different examples of system applications for hydraulic check valves. Check valves are a very important component for proper work of hydraulic equipment as shown in these examples.