API PUMP WITH GAS AND SAND PROBLEMS, CONSIDER THE TWO-STAGE HVR PUMP

If gas and particulates (sand & iron-sulfide) are becoming a problem for your API Pump, consider the rugged Two- Stage Hollow Valve Rod Pump. Which is the most popular and successful pump ever produced. This pump has several benefits and can be designed for numerous pump configurations. This paper will give a basic understanding of the sequence of operation of the Two-Stage Hollow Valve Rod Pump and its application.