Supply lng tank vacuum rebound, it means a long tank life time, mezzanine vacuum reduction will cause a rebound, leading to constant pressure relief valve exhaust. Cause lng wasted. To this end the company has developed a set of specially this question lng tank vacuum system, as long as the tank fill the vacuum sandwich can solve this ask questions. We set lng tank vacuum system, is composed by the vacuum pump system, ultimate vacuum can reach 5.0E-4Pa, vacuum degree of vacuum instrument directly from complex digital, modular design, simple operation, welcomed the new and old customers to inquire . Jiangsu East China Gas Equipment Manufacturing Co., Ltd. to provide you with cryogenic tanks mezzanine vacuum system information, cryogenic tanks mezzanine vacuum system provided by Jiangsu East China Gas Equipment Manufacturing Co., Ltd.. Products vacuum system consists of: vacuum system piping, diffusion pump unit / molecular pump unit, pre-pumping pre-Rhodes pump unit, cooling system, heating system, electrical protection system, automatic control system. Product Attributes electronic control units and the technical requirements of the diffusion pump Roots pump unit can be controlled manually and automatically controlled. Roots pump unit: a mechanical pump with a Roots pump can be manual and automatic control. 2. The mechanical pump inlet with anti-return oil installations. Diffusion pump unit / pump units etc. molecule: a diffusion pump exhaust port with anti-return oil installations. 2. The diffusion pump vacuum vent installation regulation can show the degree of vacuum in the vacuum diffusion pump is too low to protect. Vacuum valve can be manually controlled and automatic control, and prevent misuse apparatus according to the current working status and alarm. The system has automatic protection function and manual operation. Use and maintenance of ambient temperature: 10 ~ 40 ℃; Relative humidity: ≤75%; Power: Three-phase 380V, power 65KW; voltage fluctuation range: ± 10%; frequency: 50Hz; compressed air: 5-6kgf / cm2 (required filter water, oil); the other indicates that the device has a separate overheat the motors overcurrent protection to protect the equipment components; operator control panel buttons on the touch screen, such as control voltages are 24VDC safe voltage; equipment to work in a vacuum, there is no pressure on security issues. In the many factors that affect the performance of the multilayer insulation, the vacuum has played a very crucial role. Studies have shown that, when the degree of vacuum is low, i.e., P> 1 0 P a, the degree of vacuum changes have little effect on the thermal conductivity; when a vacuum degree of 1 O 1 O five P a range, with the increase of the degree of vacuum thermal conductivity of the rapid decline; when the vacuum better than 1 OP a, thermal conductivity approaches a constant value. Therefore, the apparent vacuum of general sandwich is better than 1 OP a, multilayer insulation effect can give full play to achieve good thermal insulation purposes. Vacuum process to obtain and maintain a direct impact on the degree of vacuum. The existing heating and vacuum process utilizes a combination of replacement can be better quickly achieve high vacuum, but in the application, there are some limitations. (1) heating mode selection. For small vertical cryogenic insulation container can be used within the recommended vacuum heating process, but for horizontal tank or large cryogenic vessels, mainly by external heating, the use of reasonable inner cylinder piping layout, the same can be used within heating evacuated. (2) the control of the temperature of the interlayer. In addition to the higher temperature sorbent sandwich more easily activated, and the high temperature of the soldering part of the container, and performance multilayer insulation materials are negative, so it is crucial to select the desired maximum heating temperature. Second, the current temperature of the interlayer difficult to monitor, unable to determine the actual temperature of the interlayer, so that upon heating to control the direction of the flow field to ensure a constant temperature in the interlayer and the heated gas is distributed in a reasonable state of future research. (3) the size of the evacuation process design. In the low temperature of the insulated container production lines, to achieve large-scale evacuation process is required for rational design process, including the replacement of planning gas heating system, gas flow control systems, heating systems, etc. sandwich. With the improvement of the theory of vacuum and vacuum-depth understanding of the process, the process will be the existing problems and limitations with the accumulation of theoretical and empirical gradually resolved and improved further resolved cryogenic pressure vessel manufacturing bottlenecks during evacuation problems and reduce energy consumption evacuation process.