... For more technical information,choosing pumps,quotation,pls contact with our seller engineers. Right ump,work stably and reasonable cost, ... Shaft seal-Wear-resistant materials,long-lifespan5.Bearing-Lubricated with diluted oil; reasonable cooling system guarantees the bearing ... series for multistage.More picture:More information, pls contact with TONGDA PUMP & VALVE GROUP COMPANY!Kevin Liu/ Market ...