The valve plays an important role in the flow control process. It can transport, shut off, regulate, and even mixing and diverter. However, the valve has a variety of designs, each of which has a different function. In this article, we will give you a brief introduction to fail open valves and fail close valves to help you to understand and choose a suitable valve for your project.
What Is Fail Close Valves?
Fail close valves mean the valve will auto close once the power is off or air is interrupted.
For example, in the case of power or air supply, the valve is open. When the power or the air is cut off, the valve will automatically close to ensure the safety of the project.
Therefore, if your project is dangerous and you need that the valve can be automatically closed in an emergency, then fail close valves will be your best choice.
At COVNA, we have spring return air actuated valve, fail-safe miniature motorized valve and fail-safe type electric actuator valve to meet your needs.
There is a number of springs in the spring return actuator. So once the air is interrupted, the valve will be auto close.
There is a battery in the fail-safe motorized actuator. Once the power is off, the battery will be a power source and it will drive the actuator to close the valve.
Those 2 types of valves are recommended to be a fail close valve and applied in your application.
What Is Fail Open Valves?
Fail open valves mean the valve will auto-open when the power is off or air is interrupted.
It is different from the fail close valves. Supplying power or air, the valve is closed. But once the power is off or the air is interrupted, the valve will auto open.
So the fail open valve is very suitable for the fire protection system. Because the valve will open and transport the water to extinguishing when the power is off as the fire accident.
Every valve could be customized into fail open valves. Such as auto return normally open motorized valves or spring return normally open air actuated valves.
Hope this article will be helpful to you. And any inquires about valve, welcome to consult us at sales@covnavalve.com
Post time: Nov-25-2021