LC Roots pump http://www.akclyb.com/lgb/0017.htm have belt drive and gear reducer drive in two forms. The pump has: low rpm. Efficiency. Small. Flows. Consumption power of small. self-absorption ability. not cited oil. easy to use and so on. 
 Can be used to transport oil and petroleum products (petrol for copper wheel), and transport all kinds of plant oils and fluids. Such as crude oil. Paint. Lubricants. Sealant. Fat acid. Toothpaste and light alkaline (soap processing) liquid etc., can transport all kinds of liquid food processing. as miso. taffy and so on. loading and unloading tank trucks and oil tankers and other various fast. efficient. easy to use. to reversing work.