Ring-top Group located in Tianjin, China. It started its business from 1995, manufacturing API Standard Pumping Unit. We have a 3000 units/year manufacture capacity and be granted the ISO in 2000 and first API Certificate in 2003. the company is mainly engaged in researching ,manufacturing and dealing in new types of serial energy saving pump in units, compared with the normal working modes, saving power effect will up to 15-45%. Now our pumping units including conventional pumping unit; Three fold walking beam pumping unit,; Adjustable Diameter and changeable moment pumping unit.In the past 10 years we have produced thousands of innovated products for our long-time customers. They are widely spread in main land china and America, Canada, Kazakstan and Thailand, etc. Our products are most well kwon in China and also are enjoying good reputation overseas.