Rotor Pump usually beed used to transfer high viscosity liquid. we have Rotary Lobe Pump, roots pump, internal Gear Pump. stainless steel rotary lobe pump is one kind of food grade pump, pump be used to transfer many kind of food liquid, like: juice, beer, wine, milk, honey, molasses, sugar liquid etc. roots pump is also be called lobed rotor pump, this pump have big capacity and high pressure, it's high suction let pump powerful. pump can be usde to transfer high viscosity lliquid and thick liquid, like: toothpaste, glue, resin, bitumen etc, it's stainless steel material pump also can be used to transfer high viscosity food liquid. NYP series Internal Gear Pump with the heat insulation jacket, it's usually be used to transfer crystallized high viscosity liquid.