A check valve is a type of valve that allows fluids to flow in one direction but closes automatically to prevent flow in the opposite direction backflow. Check valves are used in a wide variety of locations, but the focus of the discussion in this tutorial will be the installation of check valves at the steam trap outlet side. Check valves are necessary if there is a risk of condensate backflow. For example, when a trap discharges into a common condensate collection line, there is the potential risk of backflow from condensate discharged from other traps, so as a rule a check valve should be installed.
DFT® Check Valves can be installed Horizontal, Vertical Flow up, or Vertical Flow Down | DFT® Inc
There are many different requirements when designing fluid flow systems and installing the correct check valves for the application. Not all styles of check valves function properly or are suitable for vertical flow directions. When installing a check valve, a horizontal line is always preferred, because it takes gravity out of the equation. However, in real-world applications, the ideal situation is not always available.
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By: Bruce Ellis. We are going to discuss check valve flow orientation and position! The issue can come from different requirements caused by pump design or space limitations.