Fluid-o-Tech are a world-renowned manufacturer of rotary vane pumps. One of their more popular is the TH 500-1000 Series Stainless Steel Magnet Drive Rotary Vane Pumps.The TH 500-1000 Series pumps work on the principle of positive displacement. They are available with stainless steel or brass … [Read more...] about Fluid-o-Tech Brass and Stainless Steel Magnet Drive Rotary Vane Pumps: TH 500-1000 Series