How to operate a liquid ring vacuum pump correctly
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Why does one need to turn on the outlet first and then the inlet when starting a liquid ring vacuum pump? Why does it vibrate violently at startup, and why does the vibration decrease after a while?
You can go online and search on Baidu for the working principle of vacuum pumps, and you’ll know.
Because it relies on the working fluid to function. Vibration occurs because the working fluid is not fully filled, or there is air in the working fluid.
Before installation and use, it is necessary to carefully check whether the fasteners in all parts are loose; if any are loose, they must be adjusted and tightened. Before starting the machine, the liquid level must be filled to capacity, and the pump’s inlet valve must be opened. It is strictly prohibited to operate the pump with no liquid or in reverse direction, to prevent damage to the seal and the pump itself. Before shutting down, empty the system or reduce the vacuum level to positive pressure first, then shut down to prevent excessive vacuum, as backflow can damage the check valve; if the check valve fails, open its cover and remove any debris. If the temperature of the circulating liquid is too high, it will affect the exhaust volume and vacuum level; it is necessary to replace or add water promptly
No, and those that do exist are not detailed
Before starting a liquid ring vacuum pump, it is necessary to ensure that the liquid level inside the pump reaches the specified height (that is, there are requirements regarding the liquid level in the outlet separation tank). The outlet throttle valve should be fully open (to ensure unobstructed flow at the outlet), while the inlet throttle valve should be slightly open (to operate at a low load initially). After startup, adjust the inlet throttle valve (thereby adjusting the load on the vacuum pump) to achieve the desired level of vacuum.