Summary: Compared with manual and proportional valves, CNC electric needle valves have the characteristics of digital control, high sensitivity, fast response, and low hysteresis. This paper introduces the localized alternative products of intelligent numerical control electric needle valve developed for foreign products. These products have the same technical indicators and performance, but are more cost-effective. Compared with the domestic similar CNC electric needle valve, it has the characteristics of small size and flexible secondary development and application. At the same time, with the 24-bit precision controller, it can give full play to the fine-tuning function of the CNC electric needle valve.
1 Overview
Needle valve is a kind of fine-tuning valve, its valve plug is needle-shaped, mainly used to adjust the air flow. The needle-shaped valve plug in the needle valve can make the opening of the valve port gradually become larger, and can be continuously and finely adjusted from the closed to the maximum opening. As a valve that can be precisely adjusted, needle valve is widely used, mainly used for fine adjustment and control of gas flow, vacuum degree and pressure.
The commonly used adjustment forms of needle valves are generally handwheels and handles, but in laboratory and industrial automation production processes, digitally controlled needle valves that can be connected to computers and other control instruments are often required. The opening of the needle valve can be controlled by digital programming. Numerical control electric needle valves are used in many fields such as various high-precision analytical instruments, semiconductor process equipment, vacuum process equipment and high-precision flow control.
In addition, compared with proportional valves, CNC electric needle valves have the characteristics of high sensitivity and small hysteresis. Therefore, in response to the market demand for CNC electric needle valves, Shanghai Yiyang Industrial Co., Ltd. has developed a series of CNC electric needle valves driven by stepping motors, which have the same technical index performance as the corresponding foreign CNC electric needle valve products. Higher cost performance. Compared with domestic similar CNC electric needle valves, it has the characteristics of small size and flexibility for secondary development and application. At the same time, combined with the 24-bit high-precision controller, the fine adjustment ability of the CNC electric needle valve can be fully utilized.