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Valves are shut-off or regulating equipment placed along the path of a fluid stream.
In this video we will show you how a check valve works. Watch also the other videos on our playlist to find out all the other types of valves we use every day.
JAES, for over a decade has been providing its customer with the best solutions for their supply chain and in their catalogue you can find any kind of valve from the leading manufacturers.
The check valve, also called non-return valve is a one-way valve, where fluids flow in one direction only. For instance, in the hydraulic field they are installed on the circulation pump pipes and on the autoclave, since they nullify the water hammer effect; a phenomena which we’ve explained on our last video.
This valve is composed of an element bound by a guide which is pushed against the base of the valve by a spring. When the fluid flows and there is enough pressure, the valve will open letting the fluid to pass through; on the other hand, if there isn’t enough pressure or if the fluid is flowing from the opposite side, the valve stays closed; this is why it is also known as non-return valve, because it doesn’t let the fluid to flow back.
There are several types of check valves, let’s see them in detail:
1- Swing check valves, consisting of a flat disk; they are mostly used in inner tubes, in which they inflate the tire without letting the air coming out from inside.
2- Ball check valve, which consists of a small metal ball, also called drive sphere, which is located inside a cylindrical well, and a spring that counteracts the movement of the sphere. The well is blocked at the top by a ring nut of smaller diameter than the sphere, where the latter can lean without getting out.
3- Butterfly check valve with counterweight, which has a flat disk sectioned in the center and a spring that closes the valve. Its movement resembles the butterfly’s wings.
In this video we will show you how a check valve works. Watch also the other videos on our playlist to find out all the other types of valves we use every day.
JAES, for over a decade has been providing its customer with the best solutions for their supply chain and in their catalogue you can find any kind of valve from the leading manufacturers.
The check valve, also called non-return valve is a one-way valve, where fluids flow in one direction only. For instance, in the hydraulic field they are installed on the circulation pump pipes and on the autoclave, since they nullify the water hammer effect; a phenomena which we’ve explained on our last video.
This valve is composed of an element bound by a guide which is pushed against the base of the valve by a spring. When the fluid flows and there is enough pressure, the valve will open letting the fluid to pass through; on the other hand, if there isn’t enough pressure or if the fluid is flowing from the opposite side, the valve stays closed; this is why it is also known as non-return valve, because it doesn’t let the fluid to flow back.
There are several types of check valves, let’s see them in detail:
1- Swing check valves, consisting of a flat disk; they are mostly used in inner tubes, in which they inflate the tire without letting the air coming out from inside.
2- Ball check valve, which consists of a small metal ball, also called drive sphere, which is located inside a cylindrical well, and a spring that counteracts the movement of the sphere. The well is blocked at the top by a ring nut of smaller diameter than the sphere, where the latter can lean without getting out.
3- Butterfly check valve with counterweight, which has a flat disk sectioned in the center and a spring that closes the valve. Its movement resembles the butterfly’s wings.
The main advantage of the check valve is the absence of backflow and water hammer, which could damage the pipes.
However, this valve also has some disadvantages, such as Leakage, when a large amount of grime is placed between the base of the valve and its disk, so that the valve can’t close properly. Another disadvantage is the locking, when a bad sliding of the guide doesn’t let the plate to close completely, and most of the times the cause is due to the oxidation of the components.
Check valves are part of Safety Valves category, because they increase the safety level of a thermo-hydraulic system. For example, non-return butterfly valves are safety valves used in water pumping systems.
There are many applications for this type of valve; it is used in industrial processes for fluids management, such as in power plants, nuclear plants for waste lines, make-up water, while in the aerospace field they are used in propulsion systems for fuel pipes. They are often used when different types of gases have to be mixed. The return valves are placed on both ends of the pipes in order to prevent the mixing of gas in the original source. For example, if a fuel and an oxidizer have to be mixed, check valves will normally be placed on both the fuel and the oxidizer ends to ensure that the original gas cylinders remain pure and therefore non-flammable.
The efficiency of a non-return valve is also affected by the wear of its components, such as the closing spring which tends to wear out easily, which is why the valve must be inspected constantly to prevent the fluid from flowing to the opposite direction.
In this video we have seen how a check valve works but do you know how many types of valves we use daily? Watch the videos of our playlist, you will discover all the types of valves that surround us.
If you found this video useful, please let us know by leaving a like and a comment.
You can also share it, and don’t forget to subscribe to our YouTube channel.
However, this valve also has some disadvantages, such as Leakage, when a large amount of grime is placed between the base of the valve and its disk, so that the valve can’t close properly. Another disadvantage is the locking, when a bad sliding of the guide doesn’t let the plate to close completely, and most of the times the cause is due to the oxidation of the components.
Check valves are part of Safety Valves category, because they increase the safety level of a thermo-hydraulic system. For example, non-return butterfly valves are safety valves used in water pumping systems.
There are many applications for this type of valve; it is used in industrial processes for fluids management, such as in power plants, nuclear plants for waste lines, make-up water, while in the aerospace field they are used in propulsion systems for fuel pipes. They are often used when different types of gases have to be mixed. The return valves are placed on both ends of the pipes in order to prevent the mixing of gas in the original source. For example, if a fuel and an oxidizer have to be mixed, check valves will normally be placed on both the fuel and the oxidizer ends to ensure that the original gas cylinders remain pure and therefore non-flammable.
The efficiency of a non-return valve is also affected by the wear of its components, such as the closing spring which tends to wear out easily, which is why the valve must be inspected constantly to prevent the fluid from flowing to the opposite direction.
In this video we have seen how a check valve works but do you know how many types of valves we use daily? Watch the videos of our playlist, you will discover all the types of valves that surround us.
If you found this video useful, please let us know by leaving a like and a comment.
You can also share it, and don’t forget to subscribe to our YouTube channel.