... 2SK series water ring vacuum pump, W, WY, WL series reciprocating vacuum pump.Advantage2BV series pump for air and water ... pump can be directly mounted in a compressor, the pressure, to 0.26 MPa (maximum absolute pressure).2BV series water ring vacuum ... water ring vacuum pumps and W, WY, WL series reciprocating vacuum pump.Vacuum pump accessories: impeller,disc, the pump cover, pump body materials ...