What Faults Will Occur in the Daily Use of Liquid Ring Vacuum Pumps?

1. The working pressure of Liquid Ring Vacuum Pump should meet the requirements of ultimate vacuum and working pressure of vacuum equipment.

2. The liquid ring vacuum pump should be able to exhaust all the gas generated in the vacuum equipment process under its working pressure.

3. Combine the liquid ring vacuum pump correctly. Due to the selective pumping of vacuum pumps, sometimes the choice of a pump cannot meet the pumping requirements. In order to meet the pumping requirements, multiple pumps need to be combined to complement each other. This will allow the vacuum device to obtain a better vacuum. In addition, some vacuum pumps cannot work under atmospheric pressure and require pre-vacuum; some vacuum pumps require a pre-vacuum pump because the outlet pressure is lower than atmospheric pressure, so they need to be used in combination.

4. Requirements for oil pollution by vacuum equipment. If the equipment is strictly oil-free, various oil pumps should be used, such as water ring pumps, molecular sieve adsorption pumps, sputter ion pumps, cryopumps, etc .; if the requirements are not strict, oil pumps can be used and oil pollution prevention measures such as cold traps Baffles, grease traps, etc. , Can also meet the requirements of clean vacuum.

5. Understand the composition of the extracted gas, including non-condensable vapor, particulate dust, corrosiveness, etc. When choosing a liquid ring vacuum pump, you must understand the gas composition and select the appropriate pump for the gas being pumped. If the gas contains steam, particles and corrosive gases, auxiliary equipment such as condensers and dust collectors should be installed on the intake pipe of the pump.

6. Correctly select the working point of the liquid ring vacuum pump. Each pump has a certain working pressure range,

7. Whether the vibration of the liquid ring vacuum pump affects the process and environment. If not allowed, non-vibration pumps or vibration-proof measures should be adopted.

8. The impact of the oil vapor discharged from the liquid ring vacuum pump on the environment. If the environment is not allowed to be polluted, an oil-free vacuum pump can be used, or the oil vapor can be discharged outdoors.

Liquid Ring Vacuum Pump

For the above problems, Liquid Ring Vacuum Pump Manufacturer has made the following solutions:

1. Work under extreme pressure

It is not recommended to operate the liquid ring vacuum pump directly at the limit pressure before cooling. At the limit pressure, because the speed of the liquid ring vacuum pump is too fast, Z small or zero gas will not emit any heat through the gas or the surface of the casing. Due to the sudden temperature increase, the air gap between the rotor and the housing is too small, and the pump will stop rotating. In severe cases, this may cause the vacuum pump to fail completely.

2. Inappropriate temperature fluctuations

When the plug of the liquid ring vacuum pump is still very hot, a sudden large drop in the ambient temperature will cause the pump casing to contract, which will cause the pump to stop rotating. It is especially important to work at the limit pressure. Therefore, it is necessary to avoid sudden changes in ambient temperature at all costs. In addition, operators must take care not to suddenly open nearby shutters and other doors, especially in winter.

In addition, for those self-supporting pumps, they should be placed under the eaves or rain shed to avoid rain. If water is directed to the pump in the event of a fire, the pump casing may explode, especially in gray cast iron. Ductile iron plate pumps are more suitable to withstand such thermal fluctuations due to their high material strength.

3. Temperature control

When the liquid ring vacuum pump is working and the pressure difference Z is large, a temperature sensor should be installed at the exhaust end to prevent overheating and any damage caused thereby. This will generate an alarm at a limited temperature and turn off the pump when it reaches a large allowable temperature Z.

4. Quick evacuation

In application, a pumping cycle of several seconds is required, so the operator must ensure that the ratio of the liquid ring vacuum pump to the foreline pump is 1: 2. It is very necessary to ensure this ratio, because the fore-stage air pump occupies most of the pumping time at a pressure of 100hPa, while the liquid ring vacuum pump only needs a pressure of 10hPa to work effectively. The size of the front pump must be increased accordingly.

5. Start the pump

If a multi-stage pumping station or a combination of multiple liquid-ring vacuum pumps is used in parallel, these pumps need to be started with staggered intervals.

The above are the problems and solutions that the Industrial Pumps Wholesaler introduces to you in the daily use of the liquid ring vacuum pump.