Not all check valve styles are suitable for vertical flow directions. However, axial flow check valves do not have this problem as they function through an internal spring.įigure 2: Check valve The highlighted arrow shows the direction of media flow Check valve installation in vertical pipe runsĪ horizontal pipe is always preferred while installing a check valve as it rules out the effect of gravity. If the pipeline angle exceeds 5 degrees, the disk may not touch the seat, so the check valve may leak.

Pipeline level: Tilting disk and swing check valves have their seating surfaces machined on a 5-degree inclined plane relative to the valve centerline.

The arrow is normally printed on a separate tag or permanently marked on the valve body. The arrow indicates the proper positioning of the check valve relative to the pipe’s flow, as seen in Figure 2.

Orientation: Note the arrow on the check valve that points towards media flow.

As discussed in the next section, all check valves may not function in a vertical piping run. Always ensure that the valve is approximately five pipe diameters away from tees, elbows, or other valves that can cause turbulence. Positioning: Keep an eye on where the check valve is installed within the piping.Choosing the wrong valve can result in premature wear and tear and component failure. Selection: Choose the check valve according to the pipe’s size, media compliance, and flow rate.Mistakes during installation can reduce the efficiency of the valve or even cause substantial damage to the equipment. It is critical to employ the best practices for check valve installation to reap the full benefits of the valve.

A check valve will allow dirty water or sewage to leave the residence through pipes, but prevent it from coming back up from the main discharge back into the house. One of the most common residential examples of check valve installation is for plumbing. Installing the right check valve can prevent serious issues like water hammers and safeguard the entire process and equipment installed in piping. View our online selection of check & ball valves!Ī check valve lets the media pass through in one direction but prevents its flow in the opposite direction.

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