... Vacuum Pumps, Roots Vacuum Pumps, Gas-Cooling Roots Vacuum Pumps, Water-Cooling Roots Vacuum Pumps, Water Ring Vac We can supply various kinds of vacuum pumps:--H Series ... speed 8-1000 L/s)--ZJ and ZJP Series Roots Vacuum Pumps (Pumping speed 30-20000 L/s)--LQ Series Gas-Cooling ... L/s, 4.5-300M3/min)--LS Series Water-Cooling Roots Vacuum Pumps (Pumping speed 9-120 M3/min)--KT Series High ...