Category Archive: Check Valves

DFT Inc.’s Pulp and Paper Check Valves: Write On!

If you think of paper manufacturing (and its raw material, wood pulp), you probably think of trees, huge mills, and giant rollers. Water and liquid chemical delivery systems might not be the first things that come to mind. Both, however, comprise important steps in both pulp and paper production. Quick explanation: wood pulp is made up of certain fibers from wood, separated out from the main piece. This separation can be achieved through a number of different methods, one of which is through chemicals specially intended to break down the raw wood, while leaving the key cellulose fiber intact. As you might imagine, these chemicals can be fairly harsh, which is why DFT Inc.’s severe service check valves are the perfect replacement for standard swing check valves on batch digester systems.


The Check Valve Doctor™

DFT in-line check valves began over 60 years ago with a customer’s need for a small metal-seated check valve that could be installed in any position while providing tight shutoff. The Basic- Check® valve was developed to satisfy that need. Over the following decades, other customers’ needs led to the development of the ALC®, DLC®, DSV®, Excalibur®, GLC®, PDC®, SCV® and WLC® styles of axial flow, non-slam silent check valves. Each of these DFT check valves addresses the particular needs of a modern day customer.

DFT’s objective is to diagnose check valve problems, provide solutions and prevent failures. DFT has learned by listening to customers like you that each industry has special needs that can exceed other check valve designs. We specialize in providing in-line check valves that meet customer requirements as opposed to simply meeting line size. In some cases, minor modifications to our valves have solved customer problems while improving performance and extending service life.

The Check Valve Doctor™ continues to grow from satisfying these needs and solving problems, supported by quick response manufacturing and relentless quality control. That’s why DFT non-slam check valves are known around the world as the valve to use to prevent or eliminate water hammer problems. Whatever your size, pressure or piping configurations, DFT has a check valve for you. Thank you for considering DFT for your check valve requirements.

Click here to view our Check Valve Catalog: DFT CHECK VALVE CATALOG