First, in the scope of application Electronic universal testing machine is widely used in various metal, non-metal and composite materials, such as wood, plastic profiles, wire and cable, paper, film, rubber, medicine, food packaging materials, fabrics, etc. for tensile performance testing. At the same time, according to the domestic and international standards provided by users, various test data processing software and test aids can be customized. The digital display electronic universal testing machine is suitable for users who only ask for relevant data such as force value, tensile strength and compressive strength. If the demand is a relatively complicated parameter, it is a better choice to purchase a computer-controlled electronic universal testing machine. Second, in terms of performance Electronic universal testing machine, no oil source, so it is cleaner, more convenient to use and maintain; its test speed range can be adjusted, the test speed can reach 0.001mm/min~500mm/min, the test stroke can be determined according to needs, more flexible The measurement accuracy is high, and some can even reach 0.2%; the volume is small, the weight is light, the space is large, and the corresponding device is conveniently added to do the mechanical tests of various materials, and the utility model is truly multi-purpose. The WE series microcomputer control electronic universal testing machine produced by Shanghai Ting Technology Co., Ltd. can achieve closed-loop control such as load control, strain control, displacement and speed control. The hydraulic universal testing machine is limited by the flow rate of the oil source and the test speed is low. Manual hydraulic universal testing machine, the operation is relatively simple, the price is cheap, but the control precision is low, and it has not met the requirements of GB/T228.1-2010; the electro-hydraulic servo universal testing machine has the performance and the computer-controlled electronic universal testing machine. Compared with the low speed, the control accuracy is not inferior; the microcomputer-controlled electro-hydraulic servo universal testing machine with load sensor can also achieve the accuracy of force value of 0.5%, and it is more reliable when making large-tonnage material mechanics test. More stable and more cost effective. The WE series microcomputer controlled electro-hydraulic servo universal testing machine produced by Shanghai Tingyi Instrument meets the requirements of GB/T228.1-2010. At the same time, the product has the fast-lowering function, and the test efficiency has the same efficiency as manual operation. Third, in the structural characteristics The electronic universal testing machine mainly uses the servo motor as the power source, and the screw and the nut are used as the execution components to realize the speed control of the moving beam of the testing machine. In the transmission control, the timing belt and the speed reducer are adopted; on the force measurement, the electronic universal testing machine adopts the load sensor, which has the characteristics of low transmission and low noise. The hydraulic universal testing machine mainly uses a high-pressure hydraulic source as a power source, and uses a manual valve, a servo valve or a proportional valve as a control element for control. Ordinary hydraulic universal testing machine can only be manually loaded manually. It belongs to the open-loop control system. Due to the price factor, the load cell generally uses a hydraulic pressure sensor. The electro-hydraulic servo universal testing machine adopts servo valve or proportional valve as the control component for control. The electro-hydraulic servo universal testing machine of Shanghai Tipping Instrument uses high-precision load sensor to measure force with higher precision, which can reach 0.5. level. Fourth, in terms of cost performance The electronic universal testing machine below 300kN has advantages. The hydraulic universal testing machine is mainly used for testing mechanical properties such as tensile, compression and bending of metal and non-metal materials and parts, components and components. The hydraulic universal testing machine is an ideal test equipment for industrial and mining enterprises, building materials, quality inspection centers, water conservancy and hydropower, bridge engineering, scientific research institutes, and mechanical laboratory of colleges and universities. Manually controlled hydraulic universal testing machine, because it does not meet the standard requirements at present, it is not recommended for customers to purchase. The electro-hydraulic servo universal testing machine is the best choice. At the same time, the electro-hydraulic servo universal testing machine has a single space structure and The double space structure form, the double space structure form of the universal testing machine is slightly unchanged due to the operation in the upper space, but the price is low. The universal testing machine in the form of single space structure, the bottom of the test operation position, is ergonomic, the rigidity of the equipment is high, and there is no need to lay the foundation. At the same time, the universal testing machine with single space structure can be equipped with double-sided flat push fixture, tensile test. The jaws used can greatly improve the service life, and the use cost is low in the later stage. Generally, the steel enterprise users choose a single space structure. For the detection mechanism, the single space structure is actually a good choice. Compared with the electronic universal testing machine, the electro-hydraulic servo universal testing machine of 300kN or above has obvious price advantage. Five, after sales service The after-sales service of the testing machine is also very important, because the testing machine is a mechatronics equipment, involving mechanical, hydraulic, electrical, computer software and many other aspects, any aspect may affect the success or failure of the test and the experience of the test itself. . Therefore, when purchasing a testing machine, the comprehensive ability of the testing machine itself is mainly due to the research and development capability, because the quality of the equipment or the rationality of the design will affect the operation and equipment life, including the materials used. Hydraulic components, servo motors, reducers, etc., however, the "comfort" used is determined by the software, and the "accuracy" of the control is determined by hardware electrical control. Therefore, when purchasing a universal testing machine, we should not only consider the price factor, but comprehensively consider it, clarify the purpose of the test, and purchase the testing machine. Pressure Balance Lubricated Plug Valve Pressure balance lubricated plug valves are metal seated valves providing a tight shut off ( 0 leakage ) sealing, valves shall be regularly lubricated along with their operation by injection of suitable grease. Thanks to the absence of any body cavity and as well as a simple & tough design, they are highly recommended for any critical [Full ΔP" operation and for handling any media with an high % of solids contents, further more they provide an excellent resistance to abrasion, they are free from routine maintenance, providing a long service life. 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Shanghai's technology describes five aspects of the universal testing machine