The difference between SMC solenoid valve and electric valve

The difference between SMC solenoid valve and electric valve is simple. The main difference between Japanese SMC solenoid valve and electric valve is that the control method is different.
The solenoid valve is controlled by electromagnetic, and the electric valve is electrically controlled.


Solenoid valves are electromagnetically controlled industrial equipment. They are the basic components for controlling fluids. They are actuators and are not limited to hydraulic and pneumatic. Used in industrial control systems to adjust the direction, flow, speed and other parameters of the media. The solenoid valve can be used with different circuits to achieve the desired control, while the precision and flexibility of the control can be guaranteed. There are many kinds of search for solenoid valves. Different solenoid valves play different roles in the control system. The most common ones are check valves, safety valves, directional control valves, speed control valves, etc.

The electric valve is simply to control the valve with an electric actuator to open and close the valve. It can be divided into upper and lower parts, the upper part is the electric actuator and the lower part is the valve. It can also be called an air conditioning valve.

The electric valve is a high-end product in the self-control valve. It can not only realize the switching function, but also adjust the electric valve to realize the valve position adjustment function. The stroke of the electric actuator can be divided into two types: 90° angular stroke and straight stroke. The special requirements can also meet the full stroke of 180°, 270° and 360°. The electric actuator of the angular stroke is used with the valve of the angular stroke to realize the 90° internal rotation of the valve to control the fluid continuity of the pipeline; the linear actuator of the electric stroke is used with the valve of the straight stroke to realize the fluid on and off of the valve on the upper and lower sides of the valve.

Main features of SMC solenoid valve and electric valve
1. Main features of SMC solenoid valve The external leakage of the solenoid valve is blocked, the internal leakage is easy to control, and the use is safe. Internal and external leakage is an essential element of safety. Other self-control valves typically extend the valve stem and control the rotation or movement of the spool by an electric, pneumatic, hydraulic actuator. This must solve the problem of external leakage of the long-acting valve stem dynamic seal; only the electromagnetic valve is applied by the electromagnetic force on the iron core sealed in the magnetic isolation valve of the electric control valve, there is no dynamic seal, so the external leakage is easy to block.

2, electric valve torque control is not easy, easy to produce internal leakage, and even break the stem head; the structure of the solenoid valve is easy to control internal leakage until it drops to zero. Therefore, solenoid valves are particularly safe to use, especially for corrosive, toxic or high temperature media. 3, SMC solenoid valve system is simple, then the computer is connected, the price is low and modest. The solenoid valve itself is simple in structure and low in price, and is easy to install and maintain compared to other types of actuators such as regulating valves. What’s more remarkable is that the self-control system is much simpler and the price is much lower.

4. Since the solenoid valve is controlled by the switch signal, it is very convenient to connect with the industrial control computer. In today’s era of computer popularization and price drop, the advantages of solenoid valves are even more obvious. SMC solenoid valve action express, small power, light weight.

The solenoid valve response time can be as short as a few milliseconds, even a pilot solenoid valve can be controlled in tens of milliseconds. Due to the self-contained loop, it is more sensitive than other self-controlled valves.

5, the well-designed solenoid valve coil power consumption is very low, is an energy-saving product; can also do just trigger the action, automatically maintain the valve position, usually does not consume electricity. The solenoid valve has a small size, which saves space and is light and beautiful. Solenoid valve adjustment accuracy is limited, suitable for medium restrictions.

6. Solenoid valves usually only have two states of switch. The valve core can only be in two extreme positions, which cannot be continuously adjusted. (There are many new ideas for breaking through, but they are still in the trial and trial stage), so the adjustment accuracy is also limited.

7. SMC solenoid valve has high requirements on medium cleanliness. Granular media cannot be used. If it is an impurity, it must be filtered first. In addition, viscous media is not suitable, and the viscosity range of the medium for a particular product is relatively narrow.

8, SMC solenoid valve models are diverse and widely used. Although the solenoid valve is inherently insufficient, the advantages are still outstanding, so it is designed into a wide variety of products to meet a variety of needs, and is extremely versatile. The advancement of solenoid valve technology is also based on how to overcome the inherent deficiencies, how to better play the inherent advantages and develop the difference between SMC solenoid valve and electric valve

Post time: Dec-07-2021