Vogelsang: Since 1929, Vogelsang has been a world leading manufacturer of positive displacement rotary lobe pumps, in-line macerators, and sludge distributor heads for municipal and industrial wastewater applications. Vogelsang continues it's technological advancements with the recent introduction of 4 tip convoluted 100% pulsation free lobes, and cartridge seals as standard in all VX series pumps.