The hydraulic control valve series produced by our company are basically self-control valves, but there will be some problems in the long-term operation of the project. In this article, we will introduce the problems and solutions for the self-control valves for our customers:
First, there is a sudden valve failure during operation: like this situation may be impurities blocking the inside of the valve, as in the front of the general self-control valve is tightly installed filter to protect the self-controlled hydraulic control valve will not Due to the influence of impurities, the valve must be cleaned before use to prevent the internal impurities from affecting the performance of the valve.
Second, the valve can be circulated normally, but for the situation of decompression and flow control efficiency is not good: like the company's 200X pressure reducing valve has customer response, in fact, the reason for this problem is nothing more than the following: 
1. It may be that the diaphragm or spring inside the valve is damaged.
2. It is also possible that the installation position of the pressure reducing valve is incorrect or the internal adjustment is not good.
3. The valve is not tightly sealed, the main valve and the valve seat are loose, and dirt is plugged inside.
Third, the valve is normal, it can not be adjusted normally: like this situation, it may be that the pressure pulse before and after the valve fluctuates too much, very unstable, and there is a possibility that the size of the spring installed inside is improper, and there is a valve The use time is long, and some internal components are aged to encounter problems that cannot be adjusted and work properly. The customer should always maintain and clean the valve during use, so that the valve can run longer and more stably.
Roundness Measuring Instrument
A roundness meter is a measuring tool that uses the rotation axis method to measure the roundness error of a workpiece. The roundness tester is divided into two types: sensor rotary and workbench rotary. During measurement, the measured part is installed concentric with the precision shaft system, and the precision shaft is equipped with an inductive length sensor or workbench for precise circular motion. The roundness meter consists of an instrument's sensor, amplifier, filter, and output device. If the instrument is equipped with a computer, the computer is also included in this system.
A roundness meter is a precision instrument used to measure the out of roundness of a rotating surface (shaft, hole, or spherical surface) of a component. There are usually two types: small desktop, where the workpiece is mounted on a rotating workbench and the measuring head is mounted on a fixed column; Large floor mounted, with the workpiece installed on a fixed workbench and the measuring head installed on the rotating spindle. During measurement, the measuring head contacts the surface of the workpiece, and the rotating part of the instrument (workbench or spindle) rotates for one cycle. Due to the extremely high accuracy of the supporting bearings in the rotating part, the measuring head will generate a high-precision circular trajectory on the measured surface during rotation. The out of roundness of the measured surface causes the measuring head to shift and transform into an electrical (or pneumatic) signal. After amplification, it can be automatically recorded on a circular recording paper, and the out of roundness of each part can be directly read out for accuracy evaluation and process analysis. Widely used in precision bearings, machine tools, and instrument manufacturing industries.
The roundness meter adopts a radius measurement method and operates in a rotating manner. The rotation axis system of the roundness meter adopts a high-precision air floating spindle as the measurement reference; The electrical part of the roundness tester is composed of advanced computers, precision circular grating sensors, and precision inductance displacement sensors. The circular grating sensors and precision inductance displacement sensors measure angle and radial displacement, ensuring the accuracy of measuring the angular displacement and radial value of the workpiece; The roundness meter measurement software adopts a roundness measurement software based on the Chinese version of WinXP operating system platform, completing data collection, processing, and measurement data management.
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