An Overview Of Common Types Of Check Valve

In mechanical engines, check valves are basically used to direct fluids towards a particular direction so that they don't stray into other parts of the engine.

Check valves play a very crucial role, especially in a ship where the engine rooms, as well as other important areas, are usually enclosed in tight spaces.

In such situations, the check valve function in kicking back oily fluid on the hot engine, and this makes check valves to be very important.

So, with such a critical role of check valves in the mechanical engine, when considering to invest in one, always team up with a reputable check valve manufacturer in china for the best deal.

Now, let’s take a quick look at some basics about check valves.

Check valves are usually two-port valves that have up to two holes on the body of the valve.  

One of the holes on the body of the check valve is usually for the passage of gas, fluid of air (the media) to gain entrance into the inlet port.

The second opening on the valve body is the exit port that gives way for the exit of media from the valve.

Similar to all kinds of check valves, spring-loaded check valves do not need any external control to function effectively.

Apart from the spring, a spring-loaded check valve has a similar design element with all other types of check valves.

Characteristics and Uses of Spring Loaded Check Valve

1. No human control is required to function

2. Provide pressure relief for system safety

3. Prevent contamination from backward flow

4. Protect equipment from reverse flow damage

5. Powered by differential pressure and flow with help from spring pressure

Common Types of Check Valves and Features

1. Lift Check Valve

This type of valves work in high-pressure applications, and the internal parts move in the same manner as a piston.

In the lift check valve, the flow usually goes in beneath the seat of the valve, and as this happens the ball or piston is raised up.

As soon as flow stops, the ball returns to the seat in order to prevent backflow.

2. Butterfly Check Valve

This type of valve has a wafer in the middle of the valve that twists in order to regulate the flow of fluid.

In this type of check valve, the reverse flow of fluid when there is a drop in pressure can be avoided by adding a spring to the valve.

3. The Swing Check Valves

This type of check valve has a disk that swings in the opposite direction to the seat in order to give room for fluids to flow forward and backward to the seat and also to prevent backflow.

4. Tilting Disk Check Valve

This type of check valves is usually very important in lower pressure applications.  

Just as their name suggests, the disc in the valve tilts as a result of the flow of liquid, and it closes as soon as there is a drop in the flow of liquid.

Wrap Up

Check valves are very important to engine component in most ship or service vessel.

For the durability and maximum performance of check valves such as the tilting disc, butterfly, swing, and lift check valves, proper setup and adequate maintenance is required.

Beyond all of these, sourcing for check valves from a professional check valves manufacturer in China remains the best way to have a smooth operation with check valves.