Using the correct part for a given system or application is critical for many different reasons. Through the choice of a quality valve, the risk of valve failure is greatly reduced while the overall life cycle of the valve is maximized.
This is particularly relevant in the choice of a chemical check valve. When corrosive chemicals are involved, the need for dependable, reliable and durable parts are even more important. These valves are used in everything from actual chemical production facilities to chemical application systems and in manufacturing and processing facilities.
Check Valve Operation
Any type of check valve is a relatively simple valve, but correct sizing and the choice of the right valve for the application will be crucial. A chemical check valve has wetted surfaces that are treated to prevent corrosion and damage to the surface of the valve that can result in early valve failure.
The check valve also called a no-return or a one-way valve, is designed to prevent backflow, particularly in clean processes where this is an essential requirement. Without a check valve in place, pressure differentials in the lines to and from the check valve could result in the fluid moving back through the system.
The value of the check valve is that the backflow is prevented automatically without the need for the automated system or an operator to turn the valve on and off. This means they operate continuously even during power failures or inability of operators to get to the valve in times of pressure drop in the line coming into the valve.
It is essential to consider the application and the type of pressure that will be in the system when choosing the right chemical check valve for the job. This includes understanding what the lowest pressure will be as well, as these valves are designed to operate between a floor and ceiling pressure limit for the maximum life cycle.
