The performance of any type of system that moves media from one place to another in a process is only as good as each of the components. This includes the pipe or tubing, the fittings, as well as the valves used throughout the system. Failing to choose the right type of component not only increases the risk of a leak or a problem, but it can also create unsafe and potentially dangerous situations if the media is corrosive, dangerous, or hazardous.
Often, the smallest of components is the most critical in these types of systems. A simple yet crucial part of any type of system is the check valve. This is an in-line valve that works automatically to detect any drop in pressure on the upstream side of the valve and immediately shut, preventing and backflow through the system.
As these valves have an essential role to play in eliminating contamination and preventing the potentially dangerous mixture of chemicals in the system, a PTFE check valve is often the best choice.
A PTFE check valve has the wetted surface of the valve coated with PTFE. This chemical, correctly known as polytetrafluoroethylene, is also commonly known as Teflon.
There are several reasons why the PTFE check valve is essential in chemical system application. Understanding these advantages ensures the right quality of valve is selected to provide years of trouble-free operation.
PTFE is a chemical that provides a non-stick surface. In valves, this is essential to prevent the chemicals in the system from adhering to the valve components and preventing the valve from sealing if there is a pressure change.
The choice of PTFE is also critical to prevent damage from corrosion in the valve, and it also is a coating material that is resistant to high temperatures, eliminating the loss of protective coating that is found with other types of wetted surfaces.