Do you know what check valves are? Our team has prepared a comprehensive guide that will explain in detail everything you need to know about check valves: what they are, what types there are, what they're used for, and much more!

Check valves are devices used to prevent the reverse flow of fluids such as water, gases, vapors, etc. Check valves allow flow in a single direction and prevent return in the opposite direction.

The energy used for its operation is that of the fluid itself, eliminating the need for human force in this process. This type of valve is suitable for use with coal gas, oil gas, air, or steam.

To ensure efficient application, it is important that you use the correct check valve for your operation. To help you, we list the main types of check valves below, including:

• Piston Check Valve: Piston check valves are operated by a valve (piston) that moves freely within a guide system attached to the valve body, allowing flow to pass through the fluid's own action. It also closes by reversing the flow direction or by gravity if there is no flow and when the fluid pressure acting below the valve is not sufficient to keep it away from the seat ring, providing a rapid closing action. As a self-operated valve, the valve's valve opens, closes, or varies its position in response to volume and pressure variations that occur during the flow process. The piston valve is suitable for operating with clean, compressible fluids that develop high flow velocities (turbulent flow). It is designed to operate only in horizontal pipelines and with the valve opening in an upward direction. The minimal clearance between the valve and its guide system makes this type of valve unsuitable for fluids containing suspended solid particles.
• Swing Check Valve: Swing check valves are used in pipelines that transport gases, liquids, and saturated vapors. This type of valve is less prone to flow reversal because it operates with fluid pressure. This valve model can be installed in suction pipelines for a variety of fluid types and temperatures, as it is lightweight and compact.
• Double-Cut Check Valve: Double-cut check valves control the flow of liquid and gaseous materials within the piping network. They allow flow to pass through and also block it. A key feature of this type of valve is its durability, as it operates in high-pressure environments that also experience pressure fluctuations. Therefore, it must ensure maximum safety for the entire system and its operators.
• Cast iron: Cast iron valves are widely used, generally being applied in sanitation systems, and in situations where precise flow control is not required.
• Stainless steel : This type of valve is widely used in the pharmaceutical and food industries because regulatory agencies require a higher level of purity during production. Stainless steel valves offer greater durability and corrosion resistance. This type of valve is used for liquid fluids, gases, and vapors.

When we talk about Check Valves , these are the main types, contact our team of experts to learn more about our options!