Solenoid valve is a common actuator in the industrial control systems to achieve remote control or program control of system media. Solenoid valve can realize the purpose of switch by converting electromagnetic force into mechanical force. Because of the advantages of small volume, safe and reliable, light weight, simple operation and convenient maintenance, solenoid valve has been widely used in many fields.But many people in the choice of solenoid valve, often do not know, in different working conditions in the environment with what kind of standards, choose to suit their project solenoid valve equipment. This article will combine China giant good valve industry in many projects in the rich practical experience, for everyone to introduce some of the selection of solenoid valve points for attention, to avoid the procurement of solenoid valve mistakes.
The selection guide of solenoid valve should follow the 5 principles of safety, science, reliability, applicability and economy, and should take into account the working conditions on site. For example: valve size, working pressure, media type, media temperature, ambient temperature, power pressure, connection, installation, body material, and for the special needs of solenoid valve.
Security
Different solenoid valve to adapt to different working conditions, corresponding to different media properties. For example, the general electromagnetic valve does not have waterproof characteristics, if you need to have waterproof performance of electromagnetic valve equipment, you need to give the manufacturers a special description. Each solenoid valve has a maximum nominal pressure calibration, the maximum pressure in the pipeline can not exceed the maximum nominal pressure solenoid valve equipment, or it will bring security risks.
Scientific
Scientific, that is, to understand the working principle of solenoid valve, to distinguish different types of solenoid valve, working environment, working pressure, application, to avoid inappropriate use. In fact, according to the working principle of the solenoid valve points, and can be divided into direct-acting, distributed direct-acting, pilot-type solenoid valve, and from the different principle of the valve core structure and material, it can be divided into six kinds: the straight piston structure, the step straight piston structure, the leading piston structure, the straight diaphragm structure, the step straight diaphragm structure and the leading diaphragm structure In use, you can consult the manufacturer.
Reliability
Reliability test solenoid valve service life problem, solenoid valve is divided into normally open and normally closed type two, generally choose normally closed type, turn on, turn off; if the project on the use of solenoid valve longer open time, is suitable for the selection of normally open-type solenoid valve.
Applicability
When selecting solenoid valve, the fluid medium in the pipeline must be the same as the medium calibrated in the series of solenoid valve; the medium temperature of the fluid must be less than the setting temperature of solenoid valve. According to the viscosity of the fluid, usually below 50cSt can be chosen arbitrarily, if the viscosity value of the fluid is higher than 50cSt, high viscosity solenoid valve equipment is needed. The applicability principle must take into account the nature of the medium and the operating conditions.
Economy
Electromagnetic valve equipment corresponding to the working conditions and requirements, but many electromagnetic valve equipment can be universal, in many cases, if the working conditions are not responsible, there is no specific requirement for the equipment, you can choose general electromagnetic valve, this is a more economical approach.
Post time: Nov-25-2021