4D-SY (4D-SY/60, 4D-SY/35, 4D-SY/3.5) electric test pump is mainly applied to various types of pressure containers, oxygen cylinders, pipes, valves, steam boilers and other pressure test for , to the stress process in new technology and laboratory equipment to obtain the liquid pressure source. Is the former Ministry of Machinery Industry General Machinery Research Institute test pump design was jointly designed the latest products, old products, it has a "three" high, long life, stable performance, mobile and flexible, light weight, and On this basis, an increase of transmission and cross conversion, making this series of comprehensive technical indicators have reached standard requirements, a variety of more stable and reliable, more safe and convenient to use, while achieving the energy saving effect. Selected in the product structure of a closed water tank, reducing the whole height, form more compact appearance. This product is at 5 ° -60 ℃ of water, emulsion and the viscosity of less than 45mm2 / s of oil as the working medium and specially designed test pressure in the initial stage of rapidly filling and boost to shorten the testing time, with great flow, when the pressure exceeds 1.6Mpa (this pressure can be lowered), in order to make the process more stable pressure test conducted, the flow rate automatically decreases. So the products in the high and low pressure, have two kinds of traffic, and can automatically transform. Where the following rated discharge pressure, the pressure can be any numerical test, the product of the working environment temperature: 5 ° -60 ℃.