Pneumatic Check-Valve
Good Supplier offers you top-quality check valves, which are a critical component of pneumatic operating systems.
What is a check valve, and how it works? Let’s find out! Check valves are essential devices, yet they serve a necessary purpose in many pneumatic circuits.
A check valve is a device that only allows the flow of fluids in one direction. They have two ports, one as an inlet for the media and one as the output for the media.
Since they only allow media flow in one direction, they are commonly referred to as one-way valves or non-return valves.
The primary purpose of a check valve is to prevent backflow in the system.
Generally used in systems where backflow is not permitted, check valves are two-port valves that allow free flow in one direction and block flow in the opposite direction.
They can also be used as a bypass valve, allowing media around components such as needle valves that restrict flow in both directions.
Check valves rely on a pressure differential to work. They require a higher pressure on the input side of the valve than the output side to open the valve.
When the pressure is higher on the outlet side, or the input side pressure is not high enough, the valve will close. Depending on the valve type, the closure mechanism is different.
Unlike other valves, they do not need a handle, lever, actuator, or human to work correctly.
They are commonly installed in applications that backflow would cause an issue. However, since they are non-return valves, they are a cheap, effective, and easy solution to solve a potential problem.
Product Description
Backflow can cause an issue if the backflow is contaminated, and therefore, pollutes the media upstream. For example, a sewer line will have a non-return valve to ensure that waste can leave but not re-enter the system.
They are also used if backflow will cause damage to equipment upstream that can only allow media to flow in one direction. For example, a reverse osmosis filter can only have water pass through it in one direction, so a one-way valve is installed downstream to prevent this.
Product features
There are various sizes, designs, and materials to ensure a check valve for every application.
Common uses for check valves include:
⦿ Industrial processes, including fluid system in chemical and power plants
⦿ Aerospace applications, including aircraft hydraulic systems
⦿ Applications where multiple gases are mixed into a single stream
⦿ Irrigation sprinklers and drip irrigation systems
⦿ Home heating systems
⦿ Rainwater harvesting systems connected to the main water supply
Pneumatic check valves rely on airflow to function and are designed with a specified cracking pressure, which is the minimum pressure required for the valve to operate.
Because they are self-automated, pneumatic check valves do not require assistance to open or close and continue to function without a manual operator, electricity, or other external controls.
Pneumatic check valves are commonly used in vacuum breakers, steam lines, cooling towers, HVAC systems, sump pumps, pressure pumps, boilers, and more.
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