Check valves are generally installed in the discharge pipeline of the pumping system to ensure that the pumped medium does not flow back. With so many check valves on the market, finding the right one for your application can be a challenge. Before you start shopping for check valves, make sure you know the answers to these five questions.

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1. Application intention of check valve

The intended use of the valve and the environment in which it will be used are critical in order to select the correct valve for your specific application. It is very common to install the wrong check valve in the piping system, and the check valve should generally be selected according to the size of the pipeline.

2. The flow rate of the check valve

Know that the flow rate is the most important, in gallons per minute (GPM), gallons per hour (GPH), if your process flow is higher than 8 feet per second flow through the valve, there will be higher wear Rate. When the flow rate is higher than 8 feet per second, whether it is a rubber valve or a metal valve, wear will cause performance degradation. The faster the flow, the more wear on the check valve, resulting in reduced life. Knowing the flow rate can help you choose the best check valve for your specific requirements.

3. The inlet pressure of the check valve

Knowing the inlet pressure will help determine which type of check valve you need. Do you need a "ball" style check valve? Do you need a "swing" check valve? Or do you need a silencer check valve? Or a flange check valve or a wafer check valve? Determining which check valve you need depends on the orientation of the check valve in the pump system.

4. The back pressure of the check valve

Back pressure is the pressure difference between the inlet and outlet pressures. For example, a valve is installed at the end of a pipe that discharges fluid into a small bore. How high will the water be above the surface as the flow rises? Back pressure occurs when water rises above this valve. Therefore, according to your detailed use, you should know how much back pressure the check valve needs to accept.

5. Whether the check valve valve is installed in the medium

If the valve is installed submerged in the medium, this means that there is always a back pressure on the valve. In this case, you need to pick a check valve that is intended for submerged conditions and is manufactured from the correct material. The mistake of putting the wrong check valve in the piping system is relatively common. If your check valves are having frequent problems, it may be the result of a poor selection. Before purchasing a check valve, please inform Vitoli Valve salesman of your working conditions and needs in detail, and then you can choose a more suitable valve!

Your Checklist For Choosing The Right Check Valve

Imagine water or some other fluid like oil or gas is flowing through a pipe. You need it to flow in one direction and not &#;backtrack&#;. That&#;s where a check valve comes in.

It&#;s important to use the right type of check valve in order to avoid problems or damage to pipeline systems. Here&#;s our easy guide to check valve types.

The Purpose of Check Valves

Check valves are designed to prevent the backflow of liquid through pipes. They are usually closed until the fluid goes through. They are also able to shut off the valve if the downstream pressure becomes stronger than the upstream pressure. 

In order for the system to work right, it&#;s essential that check valves are installed at the proper intervals.

Choose the Right Type of Check Valve

There are several types of check valves, and each serves a different purpose. Let&#;s take a look at the 3 main types.

1. Swing Check Valve

A swing check valve is one of the most common types of check valves. It consists of a body, a bonnet, and a disk with a hinge. The hinge allows the disk to swing back and forth (much like a gate hinge).

Swing valves keep fluids flowing forward. You can find them in different configurations, including traditional, dual-disc, and tilted disc.

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Common uses of swing valves:

• Flush toilet mechanisms
• Water & waste pumping systems
• Sewage systems
• Firefighting & flood prevention
• Work with materials like gas & liquids

Swing check valves are a little larger so they are better suited to situations where a full port valve is required and where space and flow are not an issue.

2. Lift Check Valve

A lift check valve works much like a globe valve. Rather than a hinge, it uses a piston or ball to open and close the valve. They are designed for use under high-pressure conditions or high-velocity flow.

Common uses of lift check valves:

• Water pipes
• Heating systems
• Pumps
• Domestic uses
• Industrial processes:
  • Pipelines
  • Oil & gas
  • Food & beverage
  • Biopharma industry
  • Marine industry

You can use lift check valves in either horizontal or vertical pipelines.

3. Piston Check Valve

Piston check valves are similar to lift check valves. The difference is that the design incorporates a &#;dashpot&#;, which consists of a piston and cylinder. This creates a cushioning or damping effect, which decreases the chances of damage to the pipes.

Piston check valves are available in a couple of different configurations, including Y pattern and 90-degree.

They are often used in conjunction with globe and angle valves, and in pipelines that change the direction of flow frequently.

Uses of piston check valves:

• Oil & gas pipelines
• Water & sewage pumps
• Water pipes

Piston check valves are well suited for high-pressure and high-velocity situations.

Choosing a Check Valve

Check valves offer an effective way to manage the forward flow of fluids through pipes and pipeline systems. They have many uses in domestic and industrial situations.

However, you must think about the needs of your system in order to choose the right type of check valve. You also need to think about the size and other specs for the pipes or systems.

Contact us to discuss your requirements of Globe Valve. Our experienced sales team can help you identify the options that best suit your needs.