... its outstanding performance and advantages will replace SK, 2SK series water ring vacuum pump, W, WY, WL series reciprocating vacuum pump. ... , to 0.26 MPa (maximum absolute pressure).2BV series water ring vacuum pumps as a new generation energy-saving products, and ... Seals can use viton or PTFE.2BV2 - Ex, 2BV6 series water ring type vacuum pump/compressor is mainly used for surking explosive ...