2BV series water ring vacuum pump is suitable for pump air with water vapor, inspiratory pressure can reach 33mbar absolute pressure (97% vacuum degree). When the pump works under the inspiratory pressure is close to limit vacuum (work fluid saturation vapor pressure) for long time, should connecting cavitation protecting tube, to protect the pump. When work as the compressor, the greatest pressure is up to 0.26 Mpa (absolute pressure). As a new generation energy-saving products, with its excellent performance and numerous advantages, 2BV series water ring vacuum pumps will be fully replace SK, 2SK series water ring vacuum pumps and W, WY, WL series reciprocating pump.