Fluid Controls Ltd is one of the UK’s leading distributors for pressure control
Check Valve Types

Check valve working principle

Check valves are important to many different processes and applications, including gas and fluid systems. But how does a check valve work? In this article, we will be discussing the check valves working principle, as well as check valve types and applications.

How does a check valve work?

The check valve working principle is based on allowing flow in one direction and automatically preventing flow in the reverse direction. Check valves are one of the only valves that are completely self-automated and do not require human interaction to manually cycle them.

The construction of a check valve is normally quite simple including components such as a body, seat, disc and cover. These valves are flow sensitive and depend on media to open and close the seat. The internal disk allows media to flow forwards, which forces the valve to open. The flow is then reversed, closing the valve.

Check valve types and applications

There are six different check valve types, all of which can be used in an array of applications and processes. These include:

• Swing check valves
• Dual disc check valves
• Silent check valves
• Nozzle check valves
• Ball check vales
• Tilted check valves

When discussing check valve applications, we must first consider the media being processed. In relation to gaseous processes, check valves are often used when multiple gases are mixed into one gas stream. A check valve is installed on each of the individual gas streams to prevent mixing of the gases in the original source.

Check valves are also used in many fluid systems, such as those in chemical and power plants. Typical applications in the nuclear industry include feed water control systems; dump lines; make-up water; miscellaneous process systems; N2 systems; and monitoring and sampling systems. In aircraft and aerospace, check valves are used where high vibration, large temperature extremes and corrosive fluids are present.

Check valves from Fluid Controls

At Fluid Controls, we are proud distributors of Parker check valves. Designed for uni-directional flow control of fluids and gases, Parker check valves are a cut above the rest, offering many check valve types. Mainly used in industries such as chemical processing, oil and gas production and transmission, Parker check valves are perfect for any application.

F9 High Purity Check Valve

Veriflo Division’s F9 Series Check Valve is an all welded high purity check valve, featuring a patented asymmetric spring design for a consistently quiet operation. The F9 Series Check Valve offers high Cv (up to Cv = 0.90) in a small footprint to conserve much-needed panel space.

Hi Check Valve

These high-performance check valves offer two options for cold working pressure ratings of Class 2500 and Class 4500, with an opening pressure of 10 psi max. By offering a true two-piece design, body leakage paths are kept to a minimum.

CO Series Check Valves

Parker’s CO Series of uni-directional flow control valves are suitable for the control of fluids and gases in industries such as chemical processing, oil and gas production and transmission, pharmaceutical, pulp and paper, power and utilities. The CO Series Check Valve is particularly suitable for applications requiring high integrity leak rates and re-sealing capabilities.

Speak to a Fluid Controls expert today about check valve types and applications by calling 0118 970 2060. For more information, on how a check valve works send us an email at fluid@fluidcontrols.co.uk our technicians will be happy to help.

Latest News

How back pressure regulators work At Fluid Controls, we supply back pressure regulators from some of the industry’s leading manufacturers. From Equilibar’s sensitive high-performance back pressure regulators to spring-loaded high pressure BPR’s from Thompson, Dutch and Burling Valves - we have an extensive portfolio to suit most... Read More
Which Thompson regulator is right for your application? Thompson Valves have a regulator for every application. But which Thompson pressure regulator is right for you? In this blog, we take you through the top Thompson pressure regulators in the Fluid Controls range, to help you find the most suitable product for your specific application. Spring Loaded... Read More
Three trends shaping the future of the wastewater industry The world is changing and we must change with it. That is as true for industrial water and wastewater as it is for any other industry. Advancements in technology and increasing environmental issues are contributing toward the need for evolution. Fortunately, all signs point towards a sustained growth.... Read More
Products to help maintain a constant flow rate Here at Fluid Controls, we are reputable stockists of flow rate measurement devices. If you are striving to achieve a consistent rate of flow, we can help identify the right flow controller for your application. In this article, we will cover which of our flow control and measurement products can best... Read More
Why flow control is important in hazardous environments All industries that require the delivery of gas or liquid media for chemical processes use flow controllers. However, when processes occur in potentially hazardous environments or involve volatile gasses or liquids, flow control becomes crucial. In this article, Fluid Controls discusses the importance... Read More