Water pumps are now increasingly common, and whilst their characteristics are widely recognised, only correct operation can enhance their performance. To ensure optimal use, let us now examine the operating principles of water-ring vacuum pumps.

When a water-ring vacuum pump is in operation, the motor drives the piston within the cylinder to perform reciprocating motion via the crank-connecting rod mechanism. As the piston moves from the left end to the right end of the cylinder, the volume of the left chamber continuously increases, causing the pressure within that chamber to decrease. When the pressure in the left chamber falls below that of the container being evacuated, the gas from the container is continuously drawn into the left chamber via the intake valve in accordance with the principle of gas pressure equilibrium; this marks the intake phase. When the piston reaches its right-hand position, the left chamber of the cylinder is filled with gas. The piston then moves from the right-hand end towards the left-hand end, at which point the intake valve closes automatically. The gas is gradually compressed as the piston moves from right to left. When the gas within the cylinder reaches the discharge pressure, the discharge valve opens and the gas is expelled, completing one working cycle. As the piston moves from the left-hand end towards the right-hand end, the above cycle is repeated until the container being evacuated reaches a certain equilibrium pressure.

The intake and exhaust valves of a liquid-ring vacuum pump are vital and vulnerable components; their performance directly affects the pump’s ultimate pressure, pumping speed, power consumption and operational reliability. A clean vacuum can be achieved without any medium present in the pump’s working chamber. Consequently, an atmospheric-pressure condenser may be installed at the exhaust end of the vacuum pump to further condense solvents that cannot be condensed under vacuum conditions, thereby significantly improving solvent recovery rates.

The above outlines the operating principles of water-ring vacuum pumps. Owing to their distinctive advantages, they are now widely used. We would like to remind you once again that during operation, you must strictly adhere to the operating procedures to avoid unnecessary complications and losses. We hope the information provided here proves helpful.