Product Description: The 2BV series water ring vacuum pump is a single-stage pump with an integral structure featuring a coaxial pump and motor. It utilizes mechanical seals for shaft sealing, offering features such as simple structure, easy installation, oil-free operation, and reliability.

The 2BV series water ring vacuum pumps are suitable for extracting gases and moist steam, with an aspiration pressure capable of reaching 33mbar absolute pressure (97% vacuum). When the 2BV water ring vacuum pump operates under an aspiration pressure below 80mbar for an extended period, it should be connected to an erosion protection pipe to safeguard the pump. If equipped with an atmospheric jet ejector, the aspiration pressure of the 2BV water ring vacuum pump can reach 10mbar, and the ejector can be directly mounted on the vacuum pump's aspiration port, serving as a compressor with a maximum pressure of up to 0.26MPa (absolute pressure).

The 2BV series water ring vacuum pumps and compressors are widely used in the oil, chemical, pharmaceutical, food, and sugar industries. As the compression process of gases is isothermal during operation, they are less prone to explosion when compressing and suctioning flammable and explosive gases, thus expanding their application scope.

Working Principle:

As shown in Figure (1), the impeller 3 is eccentrically mounted inside the pump body. Upon startup, a certain height of water is injected into the pump. As the impeller 3 rotates, water is subjected to centrifugal force, forming a rotating water ring 1 on the inner wall of the pump. 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, the inner surface of the water ring gradually detaches from the hub in the 2BV water ring vacuum pump, creating a sealed space between the impeller blades and the water ring. As the impeller rotates, this space gradually expands, lowering the gas pressure within. Gas is drawn in through the disk suction port. During the second half of the rotation, the inner surface of the water ring gradually approaches the hub, and the space between the blades narrows, increasing the gas pressure. When the pressure is higher than that at the exhaust port, the gas between the blades is expelled through the disk exhaust port. Thus, with each complete rotation of the impeller, the space between the blades is evacuated and pressurized once. Many such spaces operate continuously, allowing the 2BV water ring vacuum pump to continuously suction or compress gases.

The 2BV water ring vacuum pump, due to the heat generated during operation, can cause the working water ring to heat up, and at the same time, a portion of the water and gas are discharged. Therefore, during operation, it is necessary to continuously supply water to the pump to cool and replenish the water consumed within the pump, meeting the pump's operational requirements.

When the gas discharged from the 2BV water ring vacuum pump is not reused, a gas-liquid separator is connected to the exhaust outlet of the 2BV water ring vacuum pump. After the waste gas and the portion of water it carries are introduced into the separator, they are separated. The gas is expelled through the exhaust pipe, while the remaining water is supplied back to the pump through the return pipe for continued use. As the operating time extends, the working water temperature will continuously rise. At this point, cold water needs to be supplied from the water supply pipe to lower the working water temperature, ensuring the pump meets the required technical specifications and performance indicators.