One, Applications and Specifications of the SZ Series Water Ring Vacuum Pumps:

SZ Water Ring Vacuum Pumps and Compressors are used for suction or compression of air and other non-corrosive, water-insoluble gases, to create vacuum and pressure in sealed containers.

The SZ water ring vacuum pumps come in four models: SZ-1, SZ-2, SZ-3, and SZ-4, with maximum vacuum levels ranging from 86% to 95%. The maximum pressure achievable by the SZ-1 and SZ-2 models is 1.0 to 1.4 kg/cm², while the SZ-3 and SZ-4 models can reach up to 1.5 kg/cm² under the motor power rating. Increasing the motor power allows for a maximum pressure of 2.1 kg/cm² (pump model: e.g., SZ-1, S-Water Ring, Z-Vacuum Pump, 1-Pump Number)

Section 2: Working Principle of SZ Series Water Ring Vacuum Pumps:

The SZ water ring vacuum pump, as shown in Figure 1, has its impeller ① eccentrically mounted inside the pump body ②. Upon startup, a certain height of water is injected into the pump.

Therefore, as the impeller wheel rotates, water is subjected to centrifugal force and forms a rotating water ring ③ on the pump body wall. The inner surface of the water ring at the top is tangent to the hub and rotates in the direction indicated by the arrow. During the first half of the rotation, the inner surface of the water ring gradually detaches from the hub, causing the SZ water ring vacuum pump to form and gradually expand the space between the impeller blades. This allows air to be吸入 at the suction port. During the second half of the rotation, the inner surface of the water ring gradually approaches the hub, and the volume between the blades decreases, compressing the air between the blades and expelling it.

As this impeller rotates once, the volume between the blades changes, and the water between each blade reciprocates like a piston, continuously suctioning gas by the SZ water ring vacuum pump.

Due to heat generation during operation and the expulsion of some water along with gas, it is necessary for the SZ water ring vacuum pump to continuously supply cold water to cool and replenish the water consumed within the pump. The ideal temperature for the supplied cold water is 15°C.

When the exhaust gas from the SZ water ring vacuum pump is vented, a water tank is connected to the exhaust end. The waste gas and some of the water are drained into the tank, and then the gas escapes through the outlet pipe of the tank. The water falls to the bottom of the tank and returns to the pump via the return pipe for reuse. If the cycle time is prolonged, it will heat up, at which point cold water needs to be supplied to the tank at the water inlet to cool it down.

Due to heat generation during operation and the expulsion of some water along with gases, the SZ water ring vacuum pump must continuously supply cold water to cool and replenish the water consumed inside the pump.

When the gas discharged from the SZ water ring vacuum pump is waste gas, a water tank is connected at the exhaust end. After waste water and some of the tank's water are removed, the gas escapes through the outlet pipe of the tank, while the water falls to the bottom of the tank. It is then returned to the pump through the return pipe for reuse. If the water circulation time is prolonged, it will heat up, at which point cold water needs to be supplied from the water tank's supply point.

SZ Water Ring Vacuum Pumps, when used as compressors, require an air-water separator to be connected at the exhaust end. As the wet gas enters the separator, it automatically separates, with the gas exiting to the required location and the hot water being discharged through an automatic switch (compression gases tend to heat up, and the water coming out of the pump becomes hot). The SZ Water Ring Vacuum Pump also continuously supplies cold water at the bottom of the separator to replenish the hot water that has been discharged, while also serving as a cooling function.