Flying Bull (Ningbo) Electronic Technology Co., Ltd.

Structure principle, classification and usage of solenoid valve

Solenoid valve plays a role in adjusting the direction, flow, speed and other parameters of medium in industrial control system. Although it is a small accessory, it has a lot of knowledge. Today, we will organize an article about its structural principle, classification and usage. Let’s learn it together.


Structure Principle

This product is mainly composed of valve body, air inlet, air outlet, lead wire and plunger, and its working principle can be known from its structure.

When the product is not electrified, the valve needle will block the passage of the valve body under the action of the spring, so that the product is in the cut-off state. When the coil is connected to the power supply, the coil will generate magnetic force, and the valve core can overcome the spring force and lift upward, so that the channel in the valve opens and the product is in a conducting state.


 The workers who classify products can be divided into three categories: direct-acting, step-by-step direct-acting and pilot-acting, and can be divided into direct-acting diaphragm structure, step-by-step diaphragm structure, pilot diaphragm structure, direct-acting piston structure, step-by-step piston structure and pilot piston structure according to the structure and material of the valve disc.
 When using the pilot product, we should pay attention to whether the internal pressure difference in the pipeline is enough. If the pressure difference is too small and the product cannot work normally, direct-acting products can be selected. The pressure difference is too large, so you should choose high-pressure products. Second, the general products are installed horizontally, not only on the side, but also on the side, which is likely to cause the valve to close loosely and cause internal leakage. Third, when it is used continuously for a long time, it is necessary to ensure that the seal between the piston and the valve seat is good. Once the seal becomes worse, the sealing surface of the piston and the valve seat can be re-ground. Fourth, always pay attention to the pressure gauges before and after the valve to ensure that the working pressure and working pressure difference are within the rated pressure and rated pressure difference, and stop using the product if it is found that the working pressure and working pressure difference exceed the specified value.

Post time: Apr-24-2023