[Asia Pump Network News] users most troublesome problem is the water ring vacuum pump leak rate detection problems. Leak - points within the leakage and leakage, leakage is better detection, leakage is difficult to do. Larger leak can be used flame method, the use of airflow can deviate from the principle of the flame, the first vacuum, such as candles or lighters in the vicinity of suspicious search step by step, you will find flames to the leak point, you can find the leak . Water ring vacuum pump leak rate detection methods 1, leakage and micro-leaks Find small leaks and micro-leaks is more difficult to check, we commonly used method is to use under high vacuum ionization tube to some gas sensitive to leak detection, such as Acetone or ethanol, the use of medical syringes to the suspicious areas of jet acetone or ethanol, spray to the leak, the gauge will have a significant swing indicator. Leakage test in this way must be patient, be sure to wait until the ion gauge showed stable - that is, vacuum pumping capacity and leakage rate of the balance, and then spray. It is best to repeat several times to confirm the leak. 2, leaks and leaks to find leaks occur in a water-cooled sets of equipment, check the leak did not find any doubt, but there are the following phenomena: mechanical pump pumping speed was significantly lower vacuum gauge indicates low mechanical pump The oil emulsifies quickly and the iron-based parts in the vacuum chamber are significantly tarnished. Have the above conditions can determine the basic leakage. Example: There is a 25㎠IF furnace, with 2X-70 rotary vane pump and two ZJ-150 Roots pumps plus only 10 Pa pumping, ZJ-150 pump does not show the role of the obvious did not find Leakage, but with a mechanical pump oil emulsion quickly, the vacuum chamber significantly corroded iron base conditions, after the disintegration equipment clean with cooling water through the method to detect the lid leakage, the rest is to detect leaks. First clean the inner wall, and then through the cooling water, see if wet point, wet place is the leak. (Editor: Li Juan)
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