Industrial Valves – The Check Valve

To protect pumps and other important equipment, you need to make sure that you won’t get a reverse flow. This is where industrial valves like the check valve come into play. Let’s discover how this valve works and some of the many types you’ll find today.

How the Check Valve Works

A check valve works on a simple principle. They only allow fluid to flow in one direction, and this action prevents backflow. In some systems (like sewage, water supplies, or nuclear energy applications) backflow can cause catastrophic results. There are several effective ways to prevent backflow.

These industrial valves can operate by themselves, and this is an important consideration. In other words, you don’t need actuators to use them. They do their jobs all day and all night, making sure a specific fluid system flows in the right direction. Once the pressure in the system drops, the closing mechanism activates and closes the valve. Here are some of the kinds you’ll see.

Ball Check

A round ball mechanism opens and closes the valve. The ball connects to a pressure sensitive spring. The valve stays open as long as pressure compresses the spring. Once the pressure drops, the spring extends and moves the ball over the hole, closing off the flow.

Piston Check

Similar to the ball check with a different design of the closure element

Swing Check

Swing valves are some of the simplest and easy to understand industrial valves. To see a swing valve in action, open the tank top to a standard toilet and watch the flap when you push the flush handle. Also see: Tilt Disc Check Valve.

Dual Disc

Similar to the swing check, this features double doors hinged in the center

Disc (Center Guided)

A disc and spring work together to maintain or stop fluid flow. The disk travels along a center guided shaft

Flap Check

An elastomer flap is utilized as the closure element

Silent Check

A type of disk check used in HVAC applications

Stop Check

Globe style with a loose disk- when open it functions as a globe valve but when the flow reverses the disk drops and blocks the backflow.

Choosing the Right Valve

If you need help choosing the best valve for the job, you can depend on Traeger Brothers & Associates business. Call us today at 305-371-5551 to see what we can do for you.