Check valves are commonly used when fluids are transferred through pipes, such as with water lines, HVAC systems, and discharge pumps. These devices only allow the liquid to move in one direction, and they open and close using the hydraulic pressure created by the flow of water. However, when they fail, reverse flow can cause significant damage to pipe fittings and other parts. To protect your equipment, review some common causes of failure below.

Why Do Check Valves Fail?

1. Clogged Piping

Debris can get inside your pipes and lodge inside the check valve, forcing it to remain open or closed. When this happens, the valve itself can break off and flow downstream. Clogs such as this can also cause pipe fittings to become dislodged and the piping to burst.

2. Poor Maintenance

Like any mechanical equipment, check valves should be routinely inspected and serviced to prevent failure. Valves need lubrication and can deteriorate over time, showing signs of rust and becoming dislodged. Debris in the pipeline is one sign the check valve needs to be replaced, since internal damage caused by the debris is likely.

3. Improper Installation

Many mistakes can happen during the check valve installation. Not all check valves are the same, as they come in different sizes and have different pipe flow capabilities, so choosing the right size and function is crucial for their application.

4. Reverse Flow

Significant pressure or excessive temperatures can sometimes cause reverse flow to occur, and when it does, the check valve can fail. Pumps can also experience considerable damage if this happens, so you should close your valves quickly and stop the water flow to prevent this.

If you need to replace your check valves or other pipe fittings, contact Caylor Industrial Sales in Dalton, GA. This family-owned industrial hardware supplier specializes in custom-machined parts in materials such as aluminum, brass, and stainless steel. Call (706) 226-3198 to discuss the type of valve or fitting you need, or visit them online for more information about their offerings.