How to adjust the situation where there is liquid at the inlet of a water ring vacuum pump and the vacuum pumping effect is insufficient?
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There is liquid at the inlet; should I close the inlet valve slightly?
Liquid at the inlet is due to an excessively high liquid level in the buffer tank ahead, as well as poor cooling performance of the condenser. A high temperature of the vacuum pump, a high temperature of the working fluid, a low flow rate of the working fluid, and bubbles in the working fluid can all affect the vacuum performance.
There are many reasons for this. Temperature and flow rate of the working fluid? The inlet valve can be closed first to check the vacuum level when the unit is operating alone
1. First, it is necessary to identify the reason for the high amount of liquid carried along; generally, this is due to an excess of lighter components in the raw materials. Second, poor cooling performance can also be the cause, and in such cases it is necessary to adjust the cooler in order to reduce the amount of liquid carried along； 2. Once liquid is present, it will affect the vacuum pumping efficiency, as the operating temperature rises and the density decreases; at such times, it is necessary to replace the water in the buffer tank promptly and remove the oil as soon as possible. Additionally, regarding the inlet valve mentioned by the original poster, there is no need to adjust it; it has nothing to do with the presence of liquid. The vacuum-pumping effect is already poor, and closing the inlet valve will only make the situation worse.