liquid-ring vacuum pump

As water-ring vacuum pumps are being used in an increasingly wide range of applications and are receiving ever higher ratings, their advantages are becoming widely recognised. To help you understand them better, let us now take a look at the specific methods for filling a water-ring vacuum pump with water.

liquid-ring vacuum pump

Before using a water-ring vacuum pump, the filling operation is a crucial part of the pump’s operational management. The pump will only operate normally if both the pump and the supply pipe are filled with water before the equipment is started. For small pumping stations with supply pipes of 300 mm in diameter or less, the inlet of the supply pipe is usually fitted with a foot valve; in such cases, the manual filling method is generally employed, whereby water is poured through a filling funnel into the dedicated filling and venting port at the top of the pump casing. For small pumping stations without a foot valve, the vacuum tank filling method may be used.

liquid-ring vacuum pump

Before starting the water-ring vacuum pump, the water tank must be filled to capacity to ensure a watertight seal. Once the pump is started, it draws water from the vacuum tank; as the water level in the tank drops, a vacuum is created within it. Water from the reservoir then enters the tank via the inlet pipe under atmospheric pressure, establishing a water circulation cycle and enabling the pump to operate normally. A common practice is to install a hand pump on the suction port of the liquid-ring vacuum pump, or near the pump’s suction pipe, to draw in water. This serves as a means of priming the vacuum pump when the power is switched on, eliminating the need for a foot valve in the pump’s suction pipe, reducing energy loss and improving the efficiency of the pump system. The self-priming method utilises a semi-submerged pump station (i.e. a pump station where both the inlet pipe and the top of the pump are below the water level of the inlet tank), allowing water to flow into the pump automatically without the need for manual priming. The advantages of this type of pump station are clear: it facilitates automation and offers high operational efficiency.

liquid-ring vacuum pump

The above outlines the specific methods for priming water-ring vacuum pumps. Before starting up a water-ring vacuum pump, all necessary preparations must be made, and operators must be thoroughly familiar with safe and correct working procedures to ensure the normal operation of the equipment, minimise the occurrence of operational issues, significantly reduce the risk of accidents, and safeguard the safety of the operators themselves. We would like to remind everyone once again that operations must be carried out in strict accordance with the operating regulations to avoid unnecessary complications and losses. We hope the information provided above proves helpful.