These Aerzen GMb 16.13 HV (High Vacuum) Root's blower have pumps have a huge 11,800 m3/hr (9,000 cfm) pumping speed. This blower has been rebuilt by Aerzen factor and is in stock ready to ship instantly. This is the sale of a rebuild Aerzen GMb 16.13 HV blower pump only (motor not included). These vacuum blowers made by Aerzener distinguishes itself by O-ring-seals on the housing flanges, vacuum-tightness and air cooling of the blower stage. The lube oil supply is effected by splash lubrication. As lubricant mineral oil as well as Anderol and PFPE-oil mostly used for conveying oxygen can be used. The series HV is equipped with a special oil slinger-piston ring-labyrinth seal between conveying chamber and bearing chambers. In addition a largely dimensioned neutral chamber with condensate channels is installed. Furthermore the neutral chamber can be purged with seal gas, in order to achieve an increased purging effect. The sealing of the driving shaft is guaranteed by double radial seal rings with an oil chamber.