Installing swing check valve

Not sure which brand to go with? There are a few good options for home usage. Our top picks are Zoeller, Superior Pump and Flotec. It is affordable on any budget and has a long working life — plus almost no risk of leaks! One of the most common questions homeowners ask us is: which is better brass or PVC swing check valves? Both types of check valves have pros and con.

Brass valves have a longer working life and can withstand a higher water pressure but tend to cost a little more. PVC valves on the other hand have a slightly shorter working life and more prone to cracking but they cost less than brass valves. Swing check valves on drain lines to prevent water from flowing the wrong direction once the sump pump has deactivated.

What is the difference between a spring check valve and a swing check valve? Spring check valves are powered by an internal spring while swing valves use water pressure to open and close. Best Sump Pumps. Best Pump Alarms. Improper installation of the valve, or using the wrong type of check valve, can reduce the valve lifespan.

Also, there should be a regular maintenance schedule to ensure that faulty valves are replaced at the first sign of failure. Fault location: Leakage at the connection between the valve cover and the valve body.

The nut of the connecting bolt is not tightened, or the cloth is evenly loosened. The sealing surface of the middle flange is damaged or has dirt. Repair the sealing surface and remove dirt. Fault location: Leakage at the sealing surface of the valve disc and the valve seat. Dirt is trapped between the sealing surfaces. Like all check valves, Swing check valves are used to avoid reverse flow in the pipe.

The fluid pressure that passes through a system opens the valve, whereas the valve is closed by any flow reversal. The swing check valve functions by allowing the flow forces to push the closure part, it is a hinged clapper that rotates or swings around a supporting shaft. The swinging away of the disc from the valve seat allows flow in the forward direction and returns when the upstream flow is stopped to the valve seat to prevent backflow.

Swing check design is one of the most common and best general-purpose check valves. These valves produce the lowest pressure drop, while the internal contours and shapes allow them to open fully at low fluid velocities and create a smooth flow path through the valve when compared to other check valves of the same size.

The design is simple and easy to maintain and can be used for configurations of pipes either horizontally or vertically fluid flowing upward. This makes the swing check valve suitable for wide range of applications such as petroleum, chemical, pharmaceutical, fertilizer, power, and other industries.

NTGD valve is professional swing check valve manufacturer , if you have any inquiry, please feel free to contact us. China Email: sales ntgdvalve. Ta ble of Content: 1. Definition 2. Working Principle 3. Structure Features 4. Product Standard 5. Application of swing check valve 6. Maitenance of swing check valve 7. Installation and uses of swing check valve 8.

Fault and troubleshooting 9 Summary Swing Check Valve Working Principle The swing check valve adopts a built-in rocker swing structure.

Swing Check Valve: Structural features 1. Maintenance of Swing Check Valve The swing check valve does not require much maintenance.

Installation and Uses of Swing Check Valve 1. Fault and Troubleshooting Swing check valves are very critical components in many situations, as the reverse flow is very damaging sometimes. Examples: Fault location: Leakage at the connection between the valve cover and the valve body.

The cause of the failure: 1. The gasket is damaged. Solution: 1. Tighten the nut evenly. Replace the gasket. The cause of failure: 1. The sealing surface is damaged.

When installing a swing check valve, it is vital that it opens when liquid is passing through the desired direction.

If you install one of these valves and no water goes through, then it is the wrong way around and must be reinstalled. If your swing check valve has a true union design, it can easily be removed from the pipeline. These valves are available in many different forms.

Metal swing check valves are often seen in heavy industrial use. However, a PVC swing check valve can often handle the same jobs and will be much less expensive. As stated before, a swing check valve is for when you want fluid traveling in only one direction. Another important detail about these valves is that they require no external power, which makes them ideal for a wide range of applications.

They also let fluid pass through without slowing down the flow much when fully open. One of the most common uses of a swing check valve is the flapper valve in a flush-toilet mechanism. This allows water to enter from the bottom of the tank, but prevents it from draining out the same way.

Swing check valves are the most common type of valve in water and wastewater pumping systems. In any situation where backflow could cause problems, swing check valves are the go-to. One iteration of the swing check valve is a spring check valve.

These valves function in the same way as swing check valves, but they have a spring to stay closed when there is no flow in the correct direction. That means that as soon as fluid stops flowing through, the valve claps shut. It is easy to get swing and spring check valves confused, but they do serve different purposes. Swing check valves are forced close by backflow and spring check valves are closed by default, requiring more pressure to open their door and allow fluid through.

Make sure you get the one you need! Many online forums debate on which are best for certain jobs. Checking those could help you decide which you need. Hopefully you know a little more about swing check valves now.