It is judged according to various parameters of the pressure regulator, such as raw materials, workmanship, pressure regulation accuracy, tightness, production and testing standards, and of course also includes after-sales service. AFK pressure regulator is a well-known brand in China, with CE certification, ISO 9001 certification, and its products are exported to dozens of countries at home and abroad.
If it is un-dangerous gas pressure regulator, the sealing of internal isn’t good. As it can’t be deducted, it will produce leakage when working, which will waste gas.
The quality of the gas pressure regulator itself has been verified, and there will be no waste. Only verifying the two pressure gauges does not correctly judge the quality of the gas pressure reducer itself. Not only have two pressure gauges been verified, but the quality of the gas pressure regulator has also been verified. The verification medium of the pressure gauge is water, and there is an adjustment mechanism that can corrode the gas pressure regulator, which causes the adjustment mechanism to fail.
The work table is gas medium, and the verification medium is also gas, which is scientific (not enough to arouse people's understanding) and will not pollute the checked table. After the reinstallation of the pressure gauge, there may be air leakage due to the inability to seal (because the measurement cannot be performed, only the afterthought). JJG52-1999 stipulates that the pressure gauge to be inspected must be vertical, and one of the pressure gauges of the gas pressure regulator is produced when used. This model is used to simulate the dynamic working process of a reverse unloading diaphragm pressure regulator and a pressure regulator used in a tank pressurization system. The steady-state value of the former simulation result is compared with the experimental data and simulation results of the early literature. Consistently. It shows that the steady-state accuracy of the finite-volume model meets the engineering needs; the latter's simulation obtained the response curve of the state parameters of the pressure reducer and the valve core opening, indicating that the tank pressurization process can be divided into the start-up section and the stable section. At the same time, it shows that the temperature is basically unchanged before and after throttling under the assumption of ideal gas adiabatic flow.
Mathematical models and modeling methods show good effectiveness and versatility. Obviously, the verification state of the pressure gauge is not the working state of the pressure gauge.
The verification state is the working state of the pressure gauge, which is very scientific. This has been ignored by most inspectors. If the low-pressure end pressure gauge is also verified with water (usually two pressure gauges are verified with water), it is not specified in Article 18.104.22.168 of JJG52-1999: that is, the pressure gauge with the upper limit of measurement not greater than 0.25Mpa, and the working medium is gas.
Both pressure gauges are verified by gas, which fully meets the requirements of verification regulations. There is no disassembly of the tested meter and no damage to the air tightness of the gas pressure reducer. The pressure gauge after reinstallation may not be restored to its original position and the viewing angle may change, which may cause inconvenience to use.
There is no disassembly of the tested meter, and there is no change in the angle of view of the pressure gauge on the gas pressure regulator. If the special gas pressure regulator for dangerous gas, its regulating mechanism has not been verified, once the regulating mechanism fails or leaks and enters the production site, it is very easy to cause an accident.
Post time: May-19-2021