Check valves
Check valves and non-return valves ensure required function and prevent damage to machines
Check valves allow media to flow in pipelines in one direction only and prevent a reversal of the flow direction. In the event of backflow in the other direction, non-return valves close automatically by means of a closing element, which is closed by a spring when the pressure drops. If the pressure of the medium is higher than the spring force, the closing element remains open. Only when the direction of flow is correct do the non-return valves open again.
This function is required in many applications with compressible and non-compressible media. Various closing elements are used to ensure the blocking function of a non-return valve. Depending on the technical requirements of the check valve, we use balls, pistons, discs and lip seals.
When choosing the right check valve for your application, the most important parameters include the medium, pressure, flow rate, material, installation dimensions, dimension and connections. In addition to a wide range of standard products, TRI-MATIC offers special designs for your individual application. Many things are possible here and can be defined together with you in the project phase.
Closely related to check valves are safety valves, which, however, do not close completely. Safety valves open when a certain, predefined pressure is reached in a container and close again afterwards.
Check valves and non-return valves are installed in many systems in building services and pneumatics, in humidification systems and pipelines or when filling and emptying tanks, in order to ensure the required function and prevent damage to machines or systems. The various check valves are manufactured with ecological factors in mind. Current regulations and standards of industrial automation are fulfilled and continuously renewed.
Designs and Operating Principles of Check Valves
A check valve allows a medium to flow in only one direction and closes automatically as soon as the flow stops or reverses. In hydraulic systems, it protects pumps, cylinders and control blocks from uncontrolled backflow and helps maintain system pressure. Depending on the application requirements, different valve designs are used.
Overview of Check Valve Designs
Depending on the application, medium and nominal size, different valve designs are used – ranging from standard spring-loaded solutions to dead-space-free diaphragm versions.
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FAQ
A shut-off valve, also known as a shut-off fitting, is a technical component in pipework systems that can completely interrupt or release the flow of a medium. It is used to distribute, meter or combine media in a targeted manner or to isolate individual system components, e.g. for maintenance purposes.
There are numerous types: Ball valves, flap valves, gate valves, needle valves and more. The selection depends on the medium, temperature, pressure range and hygienic requirements.
A shut-off valve is a special type of shut-off valve, usually in ball valve form. The term shut-off valve is more comprehensive and includes many other designs, such as flap or slide valves.
Both components prevent a medium from flowing in the wrong direction. A check valve is the general technical term for all valves that restrict flow to one direction. A backflow preventer, on the other hand, specifically refers to standards-compliant devices used in potable water installations that prevent contaminated water from flowing back into the drinking water supply in accordance with EN 1717. In industrial applications, such as piping systems, the term check valve is generally used.
Valves from TRI-MATIC
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