Selecting any type of component for a system is important, and it should be done based on system-specific information. This is particularly important when it comes to a one way check valve.
These valves are responsible for automatically responding to changes in pressure in the lines on the downside an upside ports of the valve. The pressure on the upside port keeps the valve open, but when that pressure drops the valve seals, preventing backflow through the system and equipment any possible contamination or damage to parts and components.
To ensure the correct one way check valve is selected, there are several essential factors to know about the system. In some cases, particularly for new product development, a custom-designed check valve to meet the specific needs of the system may be required. These custom valves are more expensive than a standard valve, but they can extend the operational life of the valve and also eliminate the risk of damage to more essential components with reliable operation at critical times.
Type of Media
The type of media in the system is always a factor in choosing a one way check valve. The more corrosive or aggressive the material flowing through the system, the more the design and materials used in the check valve become important. Seals also have to be considered in corrosive or aggressive media as the function of the seal on the intake port is critical to prevent backflow.
Pressure Difference for Activation
The pressure difference or change required to activate the check valve and cause it to seal to prevent backflow is always a critical factor. Additionally, as these valves are not manually operated, it is important to consider the typical life or duty cycle of the valve in the same type of application.
The best valves have a long duty cycle, durable seals and maintenance-free operation, making them ideal for critical types of applications.