While some valve designs and types are used in a wide range of industries and across multiple, diverse types of applications, others are more specific to a few industries and a limited number of uses. A good example of this is the poppet check valve, which can be found in use in high purity types of applications as well as other types of systems.
A poppet check valve is most often used in monitoring and controlling the flow of a vapor or a gas in a system, and specifically to prevent backflow. They are often manufactured out of stainless steel, particularly when used in high purity types of applications, but they can also be used in small equipment and engines as well.
The same types of valves are used in vehicle engines and even in locomotive engines, and they can be used in a range of industrial processes where the constant opening and closing of valves is required.
How They Work
The poppet check valve uses a spring to control the movement of the valve stem base on pressure differentials in the system. The plug or valve stem moves towards the seat to seal the valve and prevent backflow, while the opposite pressure differential causes it to open.
All of the poppet valves have a specific cracking pressure. This is the pressure that triggers the opening and closing of the valve in the system to prevent the backflow or to restore normal flow once the pressure differential is correct. They can be used in low- or high-pressure systems with good results.
As with all check valves, the poppet valve can be designed with a range of different end connections. This allows the valve to be installed easily in any system, including in a pipe or tube as required for the specific system, engine or application.
