SKA/2BV type water ring vacuum pump

Overview

SKA type water ring vacuum pump is suitable for extracting gas and water vapor, with a suction pressure of 33mbar absolute pressure (97% vacuum degree). When the vacuum pump works for a long time under a suction pressure of less than 80mbar, an air erosion protection pipe should be connected to protect the pump. If equipped with an atmospheric injector, the suction pressure can reach 10mbar, and the injector can be directly installed on the water ring vacuum pump. When used as a compressor, its maximum pressure can reach 0.26MPa (absolute pressure).
SKA/2BV water ring vacuum pumps and compressors are widely used in industries such as petrochemicals, pharmaceuticals, food, and sugar manufacturing. Due to the isothermal compression process of gases during operation, they are less prone to danger when compressing and suctioning flammable and explosive gases.

Application field

performance parameters

Structure and Characteristics

The coaxial direct connection design of the pump saves space and is easy to install.
Adopting mechanical seals as standard configuration eliminates leaks and makes maintenance easy.
△ Smooth operation, noise can be as low as 62 decibels
Unified corrosion-resistant design, bronze impeller improves the pump's corrosion resistance, while stainless steel material is more suitable for more demanding applications
The unique flexible exhaust port design ensures that SKA operates efficiently within its performance range without generating excessive compression.

working principle

The SKA (2BV) water ring vacuum pump, as shown in Figure (1), has impeller 3 eccentrically installed inside the pump body. When starting, a certain height of water is injected into the pump. Therefore, when impeller 3 rotates, water is subjected to centrifugal force and forms a rotating water ring 1 on the inner wall of the pump body. The lower inner surface of the water ring is tangent to the hub and rotates in the direction of the arrow. During the first half of the rotation process, the inner surface of the water ring of the SKA (2BV) water ring vacuum pump gradually separates from the hub, forming a closed space between the impeller blades and the water ring. As the impeller rotates, this space gradually expands, the gas pressure in the space decreases, and gas is sucked in from the disc suction port; During the latter half of the rotation, the inner surface of the water ring gradually approaches the hub, and the space between the blades gradually shrinks. The gas pressure in the space increases, and when it exceeds the pressure at the exhaust port, the gas between the blades is discharged from the disc exhaust port. In this way, every time the impeller rotates, the space between the blades sucks and exhausts once, and many spaces work continuously. The SKA (2BV) water ring vacuum pump continuously sucks or pressurizes gas.
The SKA (2BV) water ring vacuum pump generates heat during operation, which causes the working water ring to generate heat. At the same time, some water and gas are discharged together. Therefore, during operation, it is necessary to continuously supply water to the pump to cool and replenish the water consumed inside the pump, in order to meet the working requirements of the pump.
When the gas discharged from the SKA (2BV) water ring vacuum pump is no longer used, a gas water separator is connected to the exhaust port of the SKA (2BV) water ring vacuum pump. After the exhaust gas and some of the carried water are discharged into the gas water separator, the gas is separated and the gas is discharged through the exhaust pipe. The remaining water is supplied to the pump through the return pipe for continued use. With the extension of working hours, the temperature of the working water will continue to rise. At this time, cold water needs to be supplied from the water supply pipe to reduce the temperature of the working water and ensure that the pump can meet the required technical requirements and performance indicators.

1. Water ring. 2. Pump cover. 3. Impeller. 4. Inhalation port. 5. Exhaust port
Figure 1 Working principle diagram of water ring vacuum pump and compressor
When the 2BV water ring vacuum pump is used as a compressor, the pump exhaust port is connected to a gas water separator. The gas water mixture enters the gas water separator and is automatically separated. The gas is transported to the required system through the exhaust pipe, and the working water enters the 2BV water ring vacuum pump through the separator. When compressing gas, the working water is extremely hot, and the water is discharged from the pump exhaust port, causing the temperature to increase. Cold water needs to be continuously supplied from the water supply pipe to replenish the released water and also serve as a cooling effect, so that the working water temperature does not become too high, thereby ensuring the performance of the compressor, meeting technical specifications, and meeting process requirements.