How Can the Noise of a Normally Open Solenoid Valve Be Reduced?

I think everyone knows how many decibels it produces when using a normally open solenoid valve, which makes quite a few people very unhappy. So how can this kind of noise be eliminated? Below is a brief introduction to the solution.

General noise elimination methods.

1. Selection of a low-frequency normally open solenoid valve

There is a special electromagnetic device on the market, precisely to reduce noise. For a 3-position 5-way normally open solenoid valve, some use a solenoid to connect the winding and the solenoid, so that the speed in the pipeline becomes slow, thereby reaching supersonic speed — for example, a suitable 2-way 2-position solenoid valve model. This kind of solenoid valve uses a low-noise sleeve valve, which can reduce the noise to just over ten decibels.

Types of low-noise valves.

2. Application of sound-absorbing materials

Its production method is very simple: wrap it with a material that can absorb sound waves. This is a very good method, and it is also very expensive when there is no noise, especially when the pipeline is very long — for example, selecting a suitable coil, such as the more typical air-pressure one-way solenoid valve. However, remember that the noise will diffuse with the flow of the liquid, so this method is very expensive.

3. Application of an amplifier muffler

This method is to use something to protect against the noise.

4. Application of thick-walled pipelines

The ordinary diameter will also affect the noise; a thin-walled pipeline can shorten it by 5 days, and the thickness shortens it by 20 days compared with a thick-walled pipeline. The thickness of the pipe diameter has a certain influence on noise reduction and the size of the pipe diameter. In this respect, the design of a carbon canister normally open solenoid valve is very good, but the price cost needs attention.

The principle of series throttling is to distribute the pressure drop of each component evenly to each component. In order to make it work better, it is necessary to analyze each component in detail and design it according to the actual size and shape, ensuring that the noise of the solenoid valve is the same as the noise of the diffusion device. Using an amplifier is the recommended method for reducing sound.