... introduced from Japan.Features:l Various models including pressure type, vacuum type, dry type, wet type etc.l Small clearance position bearings made in Japan ... flow: 0.51~452m3/min, vacuum: -9.8~-49kPaSingle stage wet type vacuum pumps flow: 0.57~456m3/min, vacuum: -13.3 ... , aquatic farming, sewage treatment, pneumatic conveying etc. diverse industries. RR Type Roots Blower