Products Address: http://www.gdnashvacuum.com/product/showproduct.php?lang=cn&id=120 SKA/2BV series water ring vacuum pump using international technology, with a higher degree of vacuum, the powerful suction ability. Nasim vacuum Ltd. Yongjia County of 2BV series water ring vacuum pump is the overall structure of the coaxial single-stage pump. Mechanical seal, has a simple structure, easy installation, no oil, safe and reliable shaft.